Got a 2017 420 rancher fa2. Reading the manual it says to start engine ,run for 5 minutes ,shut off for 2-3 min. then check oil. On my old quad I used to check the oil before starting. Is there a specific reason for running engine before checking oil?
Checking oil
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Hi: This should help with why
This you may or not know -- your bike has a Dry Sump engine
Dry sump engines are a bit different from wet sump engines. On Dry Sump engines you will need to start and run the engine for five minutes or so -- then shut the engine off and wait for 2 - 3 minutes BEFORE you check the oil level.
Also if the engine has been sitting for any length of time you have to run it for 5 minutes, then shut off -- wait 2 - 3 minutes and check. Even if you have just changed the oil, you will need to run the engine.
This is because the oil tanks are all above the engine's oil pump. The oil is gravity feed to the pump. The oil will back feed through the pump gears and into the sump. The longer the engine sits, the more oil seeps back into the sump.
You have to run the engine so the scavenging oil pump will pump all the excess oil out of the crankcase and into the oil tank. Once the crankcase is empty of oil and the oil tank is full of oil, you can get a accurate oil level reading. Don't check the oil immediately after coming in from a hard run.
This you may or not know -- your bike has a Dry Sump engine
Dry sump engines are a bit different from wet sump engines. On Dry Sump engines you will need to start and run the engine for five minutes or so -- then shut the engine off and wait for 2 - 3 minutes BEFORE you check the oil level.
Also if the engine has been sitting for any length of time you have to run it for 5 minutes, then shut off -- wait 2 - 3 minutes and check. Even if you have just changed the oil, you will need to run the engine.
This is because the oil tanks are all above the engine's oil pump. The oil is gravity feed to the pump. The oil will back feed through the pump gears and into the sump. The longer the engine sits, the more oil seeps back into the sump.
You have to run the engine so the scavenging oil pump will pump all the excess oil out of the crankcase and into the oil tank. Once the crankcase is empty of oil and the oil tank is full of oil, you can get a accurate oil level reading. Don't check the oil immediately after coming in from a hard run.
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I'm not sure the 420 is a dry sump engine
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I checked, it is a semi dry sump engine.......someone explain this to ,me. Thanks
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Hi: Just some info I have,
ENGINE/DRIVETRAIN
Powerful 420cc longitudinally mounted engine eliminates 90-degree power transfers and boasts exceptional horsepower and torque. Overhead valve design provides compact engine dimensions for excellent ground clearance.
Cylinder head redesigned with higher compression, revised camshaft profile and larger intake valves (38 vs. 35mm) and exhaust valves (33 vs. 30mm) to ensure strong mid-range and top-end power
Programmed Fuel-Injection (PGM-FI) features a 34mm throttle body, 12-hole Denso injector, and Idle Air Control Valve (IACV) for crisp performance, excellent economy and trouble-free operation in cold conditions and varying altitudes
Large 7.2-liter airbox with washable, reusable foam air filter provides more air to the engine for increased performance
New high-capacity oil system features a high-flow filter and a two-rotor pump to provide oil for the engine and the pressurized transmission clutches
Rubber-cushion engine mounting and gear-driven counterbalancer reduce vibration
Large radiator with cooling fan ensures optimal engine cooling under difficult operating conditions
ENGINE/DRIVETRAIN
Powerful 420cc longitudinally mounted engine eliminates 90-degree power transfers and boasts exceptional horsepower and torque. Overhead valve design provides compact engine dimensions for excellent ground clearance.
Cylinder head redesigned with higher compression, revised camshaft profile and larger intake valves (38 vs. 35mm) and exhaust valves (33 vs. 30mm) to ensure strong mid-range and top-end power
Programmed Fuel-Injection (PGM-FI) features a 34mm throttle body, 12-hole Denso injector, and Idle Air Control Valve (IACV) for crisp performance, excellent economy and trouble-free operation in cold conditions and varying altitudes
Large 7.2-liter airbox with washable, reusable foam air filter provides more air to the engine for increased performance
New high-capacity oil system features a high-flow filter and a two-rotor pump to provide oil for the engine and the pressurized transmission clutches
Rubber-cushion engine mounting and gear-driven counterbalancer reduce vibration
Large radiator with cooling fan ensures optimal engine cooling under difficult operating conditions
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On a side note, if it has a dipstick that you screw in, you normally check the level without screwing it in. Most quad manufacturers are like this.
Rob
Rob
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