How much hp is 420cc

What's the horse power rating for this engine? ... 12 hp. Helpful? Yes · 24

How much hp is 420cc. Stage 1 kit comes with 0.042 and 0.043 main jets. It will increase the amount of fuel entering the combustion chamber for combustion.. This is necessary once you have an upgraded air filter that increases the air entering the engine since too much air in the air-fuel mix will cause improper combustion, i.e, the Engine will run lean.

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How much HP does a 420cc Briggs and stratton engine have? Roughly 16.5 HP. Gap on spark plug Briggs and stratton engine 4.5? 0.030 is the gap for briggs and stratton 4.5 hp mower.XP16HP Specifications Specifications Manufacturer DuroMax Power Equipment Part # XP16HP Engine Type 4-Stroke Valve Type OHV Engine Cooling Type Forced Air Displacement 420cc Bore 90mm Stroke 66mm Max Output 3600 RPM Max Torque 28.5 Nm / 23.34 ft/lb. Compression Ratio 8.8:1 Shaft Orientation Horizontal Shaft Size 1" Dia.342 cc = 15.5 to 16.5 Gross Torque = 11 to 12 hp 357 cc = 13 hp 420 cc = 14 hp. To me, cc’s is not a good comparison from one motor to another. It is also not a good comparison from one manufacturer to another. For example, a 190cc Briggs & Stratton side valve motor will not have the same power as a Honda 190cc overhead valve motor. cc’c ...XP16HPE Specifications Specifications Manufacturer DuroMax Power Equipment Part # XP16HPE Engine Type 4-Stroke Valve Type OHV Engine Cooling Type Forced Air Displacement 420cc Bore 90mm Stroke 66mm Max Output 3600 RPM Max Torque 28.5 Nm / 23.34 ft/lb. Compression Ratio 8.8:1 Shaft Orientation Horizontal Shaft Size 1" DPREDATOR 13 HP (420cc) OHV Horizontal Shaft Gas Engine – EPA – Item 60340 / 60349. Compare our price of $379.99 to HONDA at $669.99 (model number: GX390UT2QAA2). Save $240.00 by shopping at Harbor Freight.

2021 Rancher 420 ATV Miles Per Gallon: 41.4 MPG. 2021 Rancher 420 4×4 | TRX420FM1 Price / MSRP: 2021 FourTrax Rancher 4×4: $6,499 (Phantom Camo $6,999) 2021 Rancher 420 4×4 Release Date: 2021 Ranchers have a staggered release date schedule: July, August, December 2020. 2021 Honda Rancher 420 Model Lineup Color Options:Power Equipments - Offering 13 HP Approx Air Cooled 420 cc Briggs & Stratton Make Petrol Run Engine,Portable Petrol Engine, Model Name/Number: XR2100, ...The Predator 4400. Powered by an impressive 420cc (13 hp) engine, its brass triplex pump can deliver a pressure of 4400 PSI (around 73 times more than a standard garden hose) and a flow of up to 4.2 GPM ( values claimed by the manufacturer ). With these values combined, the Predator 4400 boasts a cleaning power of 18480 Cleaning Units.How to Calculate CC to HP. Example:- if your car engine displacement is 2000 cc then find power in hp. HP = CC / 15. Horsepower = 2000 / 15 = 133.333 hp. The car engine power is 133.33 HP.Jul 19, 2017 · Therefore it is a good idea, whenever you are adding the oil to the engine, to slowly and checking the level frequently to prevent overfilling. Service Tip! - When purchasing oil for seasonal maintenance, most small engines (such as those on push mowers) have total capacities of less than one quart (32 oz.) and most medium size engines (such as ... The better answer is 113 hp because it is more precise. Is It Important To Know The Horsepower Of A Vehicle? Before we dive into the conversion of cc to …

Jan 18, 2018 ... 13 hp go-kart go cart.Toro Premium 420cc OHV 4-cycle: Engine Brand: Toro: Engine Displacement (cc) 420 cc: Fuel Capacity: 1.2 gal. / 4.5 L / 4.8 Qt. Fuel Type: Gasoline: Hand Warmers: Yes: Ideal Snow Depth: 21 in / 53 cm: Ignition: Electric: Intake Height: 21.5 in / 54 cm: Lights: LED Headlights: Number of Forward Speeds: 6: Number of Reverse Speeds: 2: One Hand ...In this video I show you how do do a number of performance modifications to the Predator 420cc engine. This engine is rated for 13hp stock, and after these s...Jul 19, 2017 · Therefore it is a good idea, whenever you are adding the oil to the engine, to slowly and checking the level frequently to prevent overfilling. Service Tip! - When purchasing oil for seasonal maintenance, most small engines (such as those on push mowers) have total capacities of less than one quart (32 oz.) and most medium size engines (such as ...

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Forgetting your password can be a major inconvenience, especially if you need to access your laptop quickly. Fortunately, removing a password from your HP laptop is an easy process...Toro Premium 420cc OHV 4-cycle: Engine Brand: Toro: Engine Displacement (cc) 420 cc: Fuel Capacity: 1.2 gal. / 4.5 L / 4.8 Qt. Fuel Type: Gasoline: Horsepower: 5 hp: Ideal Snow Depth: 21 in / 53 cm: Ignition: Electric: Intake Height: 21 in / 53 cm: Lights: LED Headlights: Number of Forward Speeds: 6: Number of Reverse Speeds: 2: One Hand ...Location. Durham, CA. Jan 23, 2019. #9. You can gain more hp by making the intake a proper length. On a 420cc engine thats going to run at about 6500 rpm the intake has to be 13.5" inches long. The measurement is taken from the valve to the end of the carb. That makes the intake tube 6" inches long.Nov 13, 2020 ... I Bought a 100-HP ... 420cc Mega Moto First Ride ~ Too Much Torque!!!! ... 25+HP Predator 420cc Hemi Everything Billet Build ~ XXL Go Kart Engine.420cc liquid-cooled OHV wet-sump longitudinally mounted single-cylinder four-stroke: Valve Train: OHC; two valves per cylinder: Bore x Stroke: 86.5mm x 71.5mm: Compression Ratio: 9.9:1: Induction: Programmed Fuel Injection (PGM-FI), 34mm throttle body: Ignition: Full transistorized with electronic advance: Starter: Electric with optional ...1 horsepower is equivalent to 750 Watts or 550 foot-pounds per second.

This manual is also suitable for: View and Download Predator Engines 420cc owner's manual & safety instructions online. 420cc Horizontal Engine. 420cc engine pdf manual download. Also for: 69736.3) Horsepower is a U.S. Customary Weights & Measure calculated measure that includes torque, engine speed in RPM (Revolutions per Minute), where the HP is calculated (engine crankshaft, drive train, wheels, etc..) and other factors. Like torque, horsepower measurements can vary significantly with operating conditions and measurement techniques.Jul 10, 2023 · CC to HP Formula. The following equation can be used to convert a CC to HP of a typical combustion ending. HP = CC/15 H P = CC /15. Where HP is the horsepower. CC is the cubic centimeters. To calculate horsepower from CCs, divide the CCs by 15. The Zongshen GB420S is a 420 cc, (25.63 cu·in) single-cylinder air-cooled 4-stroke internal combustion small gasoline engine, from GB-series manufactured by Zongshen Power Co. for general-purpose applications. The Zongshen GB420S engine has an overhead valve (OHV) design, carburetor fuel system, transistorized ignition system, and recoil or ...Apr 9, 2021 ... a 420cc Predator but most small engines ... How to Change the Oil in a Small Engine | 420cc Predator Engine | TYRANIS TIPS ... I put a Duromax 18 HP ...To get its HP rating, divide 2,000 by 15 and 17. The resulting figures are 117 and 113. Another example is an 800-CC engine. Using this calculator, you will get an HP figure of between 47 and 53 HP. Conversely, you can estimate your car’s engine displacement if you only have the HP figure. To do this, simply multiply the HP rating by 15-17. DuroMax 420cc Predator 420cc; Fuel: Gas Multi-Purpose, 87-octane gasoline Gasoline and Petrol Engine: Product Image View on Amazon: View on Amazon: Engine: The heavy-duty engine features a 4-stroke OHV durable 16HP 420cc engine: 420cc OHV Horizontal Shaft, This heavy-duty gas engine allows you to tackle a variety of projects in and around your ... HP = CC ÷ 15. In this formula: HP stands for horsepower. CC represents the engine’s cubic centimeters. Simply, to compute the horsepower from the engine’s CC, divide the value of CC by 15. The Science behind CC and HP. CC measures the volume of the cylinder, which in essence gives an idea of the size of the engine. A larger CC indicates a ...Are you experiencing the frustration of having your HP printer show up as offline? Don’t worry, you’re not alone. Many users encounter this issue, but fortunately, there are severa...Horizontal Threaded Crankshaft − .002 − .008”. Horizontal Threaded Crankshaft − .002 − .008”. Horizontal Threaded Crankshaft − .002 − .008”. Both Rod Screws Same Size: Torque to 185 In. Lbs. ** Torque Small Rod Screw First: 160 In. Lbs. Torque Large Rod Screw Second: 260 In. Lbs. Clearance With Valve Springs Installed ...

This Powerhorse® OHV Horizontal Engine is an easy-to-install solution for small engine needs. With 420cc, 12.5 HP and 18 ft.-lbs. of torque, this 1000-hour engine provides enough power to run a wide range of equipment, including log splitters and pressure washers.

Dec 9, 2022 · How many hp is a 420 cc engine? 14 hp in 420cc you take 420cc devide by 30 = 14hp. How much HP does a 420cc Briggs and stratton engine have? Roughly 16.5 HP. How do you convert hp to kilowatts? Our Price:$449.00. Stock Status:In Stock. Part #:ENG-OEM-HF-13HP. Qty: Description -. Technical Specs. 13hp 420cc Predator Engine. This Predator 420cc gasoline engine has gas-saving overhead valves for cooler, cleaner performance and longer life. The horizontal shaft is ball-bearing mounted, making this gas engine an ideal replacement for most ...DuroMax 420cc Predator 420cc; Fuel: Gas Multi-Purpose, 87-octane gasoline Gasoline and Petrol Engine: Product Image View on Amazon: View on Amazon: Engine: The heavy-duty engine features a 4-stroke OHV durable 16HP 420cc engine: 420cc OHV Horizontal Shaft, This heavy-duty gas engine allows you to tackle a variety of projects in and around your ...Solution. Horsepower is a unit of power in the U.S. Customary Weights & Measures System equal to 745.7 watts or 33,000 foot-pounds per minute. During the 1800's an early pioneer in the history of combustion engines, James Watt, determined that the average horse could move 33,000 lb. on a linear plane 1 foot in 1 minute.The Marine Turbine Technologies 420 RR has 420.00 HP (306.6 kW)) @ 52000 RPM. How much does a Marine Turbine Technologies 420 RR weighs? The Marine Turbine Technologies 420 RR weighs 226.8 kg (500.0 pounds). How tall (seat height) is a Marine Turbine Technologies 420 RR?Aug 5, 2022 · 420cc liquid-cooled OHV wet-sump longitudinally mounted single-cylinder four-stroke: Valve Train: OHC; two valves per cylinder: Bore x Stroke: 86.5mm x 71.5mm: Compression Ratio: 9.9:1: Induction: Programmed Fuel Injection (PGM-FI), 34mm throttle body: Ignition: Full transistorized with electronic advance: Starter: Electric: Driveline Toro Premium 420cc OHV 4-cycle: Engine Brand: Toro: Engine Displacement (cc) 420 cc: Fuel Capacity: 1.2 gal. / 4.5 L / 4.8 Qt. Fuel Type: Gasoline: Hand Warmers: Yes: Ideal Snow Depth: 21 in / 53 cm: Ignition: Electric: Intake Height: 21.5 in / 54 cm: Lights: LED Headlights: Number of Forward Speeds: 6: Number of Reverse Speeds: 2: One Hand ...To get its HP rating, divide 2,000 by 15 and 17. The resulting figures are 117 and 113. Another example is an 800-CC engine. Using this calculator, you will get an HP figure of between 47 and 53 HP. Conversely, you can estimate your car’s engine displacement if you only have the HP figure. To do this, simply multiply the HP rating by 15-17.FAQs. How do you convert cc to HP? The conversion of CC (cubic centimeters) to HP (horsepower) varies based on factors like the engine's efficiency and …

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How Much CC Is Equal To 1 HP? As calculated with this horsepower to CC converter, there are 32.5 CC in 1 HP. Automobiles CC & HP Table: Engine: CC: HP: RPM: CC / HP. Model car 2 stroke diesel – Rossi 236R21: 3.5: 3.45: 42,600: 1.0145. Top fuel dragster V8 supercharged: 8194: 8000+ 8 200: 1.0243. F1 racing car 1987 turbo-qualifying: 1494:Jul 27, 2023 ... In this video we show how to remove the governor and add more power to my predator 420cc this is getting me one step closer to riding this ... PREDATOR 13 HP (420cc) OHV Horizontal Shaft Gas Engine – EPA – Item 60340 / 60349. Compare our price of $379.99 to HONDA at $669.99 (model number: GX390UT2QAA2). Save $240.00 by shopping at Harbor Freight. Understanding Horsepower. Understanding Engine CC. FAQ. Conclusion. Horsepower To CC: How To Convert Them? Converting horsepower to CC is fairly …Aug 5, 2022 · 420cc liquid-cooled OHV wet-sump longitudinally mounted single-cylinder four-stroke: Valve Train: OHC; two valves per cylinder: Bore x Stroke: 86.5mm x 71.5mm: Compression Ratio: 9.9:1: Induction: Programmed Fuel Injection (PGM-FI), 34mm throttle body: Ignition: Full transistorized with electronic advance: Starter: Electric: Driveline The power output of a naturally aspirated engine is between 25 and 70 horsepower per liter or 14 to 34 cubic centimeters per horsepower. Over time, the technology used to design engines has improved significantly, and now even the smaller engines can get a lot of power out despite the lack of a turbo.Predator 420cc Governor Adjustment. Thread starter Neverdone; Start date Jul 29, 2016; Status Not open for further replies. N. Neverdone New member. Messages 179 Reaction score 0 Location Maybee, MI. Jul 29, 2016 #1Enter a injector size and we can give the max horsepower supported for the entered injector size. 561-427-0082; My Account. Register; Login; Wish List (0) Shopping Cart; Contact us. Telephone 561-427-0082 E-mail [email protected] Address 12848 SE Suzanne Dr Suite A Hobe Sound, FL 33455 ...PREDATOR 13 HP (420cc) OHV Horizontal Shaft Gas Engine – EPA – Item 60340 / 60349. Compare our price of $379.99 to HONDA at $669.99 (model number: GX390UT2QAA2). Save $240.00 by shopping at …We would like to show you a description here but the site won’t allow us. ….

Now let’s dive into all of the details on the 2022 Honda Foreman 520 ATV…. 2022 Honda Foreman 520 Release Date: Fall 2021. 2022 Honda Foreman 520 Model Lineup Options / Prices: 2022 Honda Foreman 520 – $7,499 (TRX520FM1) 2022 Honda Foreman 520 EPS – $8,199 (TRX520FM2) 2022 Honda Foreman 520 ES EPS – …I answered this question on Quora: https://www.quora.com/How-much-horsepower-is-a-420cc-engine/answer/Scott-Krager My video answer to the question: How Much ... The Stage 1 Performance Kit for 301/420cc Engines is the perfect upgrade for anyone looking to boost their engine's performance. This kit includes a high-quality air filter, air filter adapter, and a jet kit, all designed to work together to improve the power and efficiency of your engine. The air filter is made from premium materials and provides superior filtration, while the performance ... Jul 19, 2017 · Therefore it is a good idea, whenever you are adding the oil to the engine, to slowly and checking the level frequently to prevent overfilling. Service Tip! - When purchasing oil for seasonal maintenance, most small engines (such as those on push mowers) have total capacities of less than one quart (32 oz.) and most medium size engines (such as ... PREDATOR 13 HP (420cc) OHV Horizontal Shaft Gas Engine – EPA – Item 60340 / 60349. Compare our price of $379.99 to HONDA at $669.99 (model number: GX390UT2QAA2). Save $240.00 by shopping at Harbor Freight.Stage 1 kit comes with 0.042 and 0.043 main jets. It will increase the amount of fuel entering the combustion chamber for combustion.. This is necessary once you have an upgraded air filter that increases the air entering the engine since too much air in the air-fuel mix will cause improper combustion, i.e, the Engine will run lean.Nov 2, 2008 · 179 cc = 5 hp. 208 cc = 8 to 9 Gross Torque = 5.5 to 7 hp. 243cc = 8 HP. 277 cc = 11 to 11.5 Gross Torque = 8 to 9 hp. 305 cc = 13.5 to 14.5 Gross Torque = 9 to 10 hp. 342 cc = 15.5 to 16.5 Gross Torque = 11 to 12 hp. 357 cc = 13 hp. 420 cc = 14 hp. To me, cc’s is not a good comparison from one motor to another. 420cc (13HP) Predator Engine. This Predator 420cc gasoline engine has gas-saving overhead valves for cooler, cleaner performance and longer life. The horizontal shaft is ball-bearing mounted, making this gas engine an ideal replacement for most standard engine configurations. The powerful gas engine features a durable cast iron cylinder making ... How much hp is 420cc, Toro Premium 420cc OHV 4-cycle: Engine Brand: Toro: Engine Displacement (cc) 420 cc: Fuel Capacity: 1.2 gal. / 4.5 L / 4.8 Qt. Fuel Type: Gasoline: Horsepower: 5 hp: Ideal Snow Depth: 21 in / 53 cm: Ignition: Electric: Intake Height: 21 in / 53 cm: Lights: LED Headlights: Number of Forward Speeds: 6: Number of Reverse Speeds: 2: One Hand ..., 420 horsepower is equal to about 313 kilowatts. Mechanical horsepower is commonly used to measure the maximum power of a car's engine in the United States. It is slightly different than Metric horsepower, which is used in Europe. A kilowatt is 1,000 watts. Usain Bolt's maximum power output while sprinting was about 2.6 kilowatts., HP = CC ÷ 15. In this formula: HP stands for horsepower. CC represents the engine’s cubic centimeters. Simply, to compute the horsepower from the engine’s CC, divide the value …, Predator 420cc Governor Adjustment. Thread starter Neverdone; Start date Jul 29, 2016; Status Not open for further replies. N. Neverdone New member. Messages 179 Reaction score 0 Location Maybee, MI. Jul 29, 2016 #1, PREDATOR 13 HP (420cc) OHV Horizontal Shaft Gas Engine, EPA. Add to List. Shop All . PREDATOR. Customer Videos $ 379 99. Compare to. HONDA GX390UT2QAA2 at $ 669.99. Save $ 290. Replacement for 13 HP Gasoline Engines Read More. Add to Cart. Legendary Reliability & More Power. Learn more and shop the entire Predator engines …, ... HP 16HP 420cc Air Cooled. 12 months/18months ... many discounts and specials provided by various suppliers here occasionally. ... Are you tired of going through ..., In this video I unbox, assemble, use, and review the 4400 PSI 4.2GPM Predator pressure washer that I bought at Harbor Freight. I explain some quick possible ..., How much horsepower does a Predator 212 have? 6.5 HP Predator Engine 212cc (6.5 HP) Harbor Freight. Who makes the 420cc Predator engine? They are made by Loncin who makes most of the good Chinese engines including the Briggs and Stratton engines. There is a ton of aftermarket support as well. The 212cc is most popular and the 420cc is very ..., How to Calculate CC to HP. Example:- if your car engine displacement is 2000 cc then find power in hp. HP = CC / 15. Horsepower = 2000 / 15 = 133.333 hp. The car engine power is 133.33 HP., The Predator 420 is typically found on heavier and more powerful go-karts, as this engine is much heavier and also delivers much more power. With a displacement of 420cc, it manages to produce a total of 13 hp. At 2,500 rpm this powerhouse of an engine produces 18.4 ft-lb of torque., With easy installation and a perfect fit for your 301/420cc engine, this kit is a must-have for anyone looking to take their engine to the next level. Upgrade ..., Horsepower (metric) Definition: The unit horsepower (symbol: hp) is a unit of measurement of power (the rate at which work is done). Mechanical horsepower, also known as imperial horsepower, is defined as approximately 745.7 watts (550 ft·lbf/s), while metric horsepower is approximately 735.5 watts (75 kgf·m/s)., Predator 13 HP (420cc) OHV Horizontal Shaft Gas Engine EPA/CARB ... This Predator 420cc gasoline engine has gas-saving overhead valves for cooler, cleaner ..., Inkjet printers are ubiquitous nowadays, but not all of them use ink cartridges. HP has developed a new printing technology called Insta Ink that doesn’t require any cartridges. He..., Sep 20, 2023 · How much HP does a 420cc Briggs and stratton engine have? Roughly 16.5 HP. Gap on spark plug Briggs and stratton engine 4.5? 0.030 is the gap for briggs and stratton 4.5 hp mower. , Have you ever encountered the frustrating situation where your HP printer suddenly goes offline? It can be a major inconvenience, especially when you need to print important docume..., APWC9310 All-Power Woodchipper JD Engine 15HP 420cc Shredder 5" Opening with Off-Road Tow Hitch Model APWC9310. Your Price: $1,899.99. Retail Price Retail Price: $1,999.99. ... STRONG MOTOR — Powerful JD Engine gasoline powered motor will provide 15 HP with a 420cc engine., Let’s use an example where we’ve got a 75 HP engine. Multiplying 75 HP by 15, we would calculate it to have 1,125cc. For simple numbers, let’s look at converting 1 HP to cc. 1 HP …, From what I read you divide CC by 2 then divide that answer by 2 = HP. Today a salesman told a certain machine 420CC was same as 10HP. When I calculate it, it comes out to 13HP, am I wrong on how to calculate. Honda HS622T., 14 hp 420cc ohv gas engine with electric start (53 pages) Engine Power Fist 8513533 User Manual. 5 hp open drip proof electric motor (25 pages) Engine Power Fist 8937260 Manual. 6 hp 224cc vertical shaft gas engine (37 pages) Summary of Contents for …, Is your HP laptop refusing to turn on? It can be a frustrating experience, especially if you rely on your laptop for work or personal use. There could be several reasons why your H..., Solution. Horsepower is a unit of power in the U.S. Customary Weights & Measures System equal to 745.7 watts or 33,000 foot-pounds per minute. During the 1800's an early pioneer in the history of combustion engines, James Watt, determined that the average horse could move 33,000 lb. on a linear plane 1 foot in 1 minute., Effortlessly convert engine performance! Use our CC to HP Calculator for accurate cubic centimeter to horsepower conversions. Unlock the power with precision., Effortlessly convert engine performance! Use our CC to HP Calculator for accurate cubic centimeter to horsepower conversions. Unlock the power with precision., Cars & Cameras have a couple 40 horsepower builds using #420 chains with no issues, but right now I plan on using a #428 or #530 chain as I'd rather not risk it. #428 is what I'm leaning towards at the moment. ... probably a 420cc. So to answer your question, that would be a 40-Series torque converter (CVT). Sure I'm probably not going to get ..., The Stage 1 Performance Kit for 301/420cc Engines is the perfect upgrade for anyone looking to boost their engine's performance. This kit includes a high-quality air filter, air filter adapter, and a jet kit, all designed to work together to improve the power and efficiency of your engine. The air filter is made from premium materials and provides superior filtration, while the performance ..., How much horsepower does the Rancher 420 have? The Rancher 420 is manufactured with a 420cc horsepower single-cylinder engine. Liquid cooled, electronically fuel injected and ready to ride, it has the ability to race down the trail at a good speed., DuroMax 420cc Predator 420cc; Fuel: Gas Multi-Purpose, 87-octane gasoline Gasoline and Petrol Engine: Product Image View on Amazon: View on Amazon: Engine: The heavy-duty engine features a 4-stroke OHV durable 16HP 420cc engine: 420cc OHV Horizontal Shaft, This heavy-duty gas engine allows you to tackle a variety of projects in and …, approximately 4 horsepower. The small engine has a cylinder, housing, a piston, and a head. The space, or volume between the top of the piston and bottom side of the head is …, Mar 8, 2021 · How much oil does a 420cc take? A 420cc is close to a 13 hp, so the oil capacity is 64 oz. How many cc is a 12.5 hp engine? How many cc is a 12.5 hp engine? Briggs & Stratton Intek 344-cc 12.5-HP Briggs & Stratton Replacement Engine for Riding Mower. How do I know the horsepower of my lawn mower? Torque x Speed (RPMs) divided by 5252 ... , Jan 18, 2024 · For this method of conversion, you can use these numbers. 1. Divide the size of your engine by 14. 2. Divide the size of your engine by 17. The range of horsepower your car engine has is what you get as a result. The result of step 1 is about the maximum HP, and the result of step 2 is about the minimum HP. , Jun 29, 2014. #1. Hey guys, I just bought a small Sears Craftsman lawn tractor made by MTD, and it's got a Chinese 420cc OHV engine with full pressure lubrication. I've got a couple of oil-related questions that I was hoping someone here might be able to help with. The oil filter has a really weird thread (1-12) and I can't find a cross …, The formula below is used to calculate engine horsepower (hp) from wheel horsepower (WHP). HP = WHP * 1 / (1 – DL ) Where HP represents engine horsepower. WHP is wheel horsepower. DL represents drive train loss. For front-wheel drive, the drive train loss is 10%; for rear-wheel drive, it is 15%; and for all-wheel drive, it is 25%.