New member - difference between 2 stroke and 4 stroke lawn mowers

[Grass ala Mowed]

One of the first oil injected snowmobiles was a Yamaha. They used a small belt to drive the oil pump, which worked very well on road motorcycles. However, snowmibiles bump and bang along and they had belt failures - not pretty. One of my friends had one, going wide open across a field he saw something fly over his head (the belt); most of the engine went over his head a few seconds later. Apparently the engine didn't like having no lubrication at 7,000 rpm. They quickly went to mechanical drive, pretty much the industry standard now.

 

[oldyellr]

One of the first oil injected snowmobiles was a Yamaha. They used a small belt to drive the oil pump

I had one! A 1971 292. It was cool stopping at a gas station and filling up from the pump while my buddies with Skidoos, etc, had to mix their gas. The Yamaha was very advanced for a snowmobile at the time and the rest were crude and agricultural in comparison. One morning after I'd left it out uncovered the linkage from the carb to the oil pump was frozen, so I took a propane torch to it and melted the plastic bits in the pump, so had to go to mixing. I eventually bored out the intake port and went to a bigger carb, but that little spring belt was there forever.

 

[Grass ala Mowed]

I resemble that! I had a 1971 SkiDoo TNT 340. With a little port and polish and clutch tuning my agricultural grade machine could run with most 440s.

 

[jmurray01]

:welcome:

The difference it pretty simple really.

2 Stroke has two cycles, or strokes, and a 4 Stroke has four cycles/strokes.

The 2 Stroke manages to do two things at once, whereas the 4 Stroke does each of the four steps (Intake, Compression, Fire, Exhaust) separately.

Which one is better has been debated many times, with no real answer, as they are both good at certain tasks and there will always be a fan of either who will perpetually defend the one they prefer, but it can all get confusing.

The simple fact is that 2 Stroke is better for being lighter and producing power quickly, and 4 Stroke is better for being more durable and producing more torque.

I'm sure some will disagree with the above statement, but that is what I believe.

 

[LazerZLandscaping]

And you have an oil/gas mix. The reason you have oil in your gas is because the oil lubricates the piston.

 

[exotion]

And you have an oil/gas mix. The reason you have oil in your gas is because the oil lubricates the piston.

Way to revive a thread that was last posted 2012

 

[LazerZLandscaping]

Way to revive a thread that was last posted 2012

And that's good or bad

 

[KennyV]

And that's good or bad

Yes... :smile:KennyV