Is the compression on my 357xp good or bad?

Is the compression on my 357xp good or bad?

Got the cylinder plug for my 357xp to replace the auto decomp valve, and the compression seems good. I know, I need to do a compression test to be sure, but it feels like the compression is good and I can suspend the saw (with bar attached) by the starter rope and it holds.

Do you need to do a compression test?

I know, I need to do a compression test to be sure, but it feels like the compression is good and I can suspend the saw (with bar attached) by the starter rope and it holds. I don’t have a compression gauge, so that’s why I don’t have a reading, but I’ll get it measured as soon as I can.

Why does my saw have spark, gas, and compression?

I have spark, and after repeated cranking the plug is moist with fuel, so I think I have spark, fuel, and compression, but it won’t even sputter, nothing at all. I thought about pulling the carb and doing a rebuild, since that’s fairly easy to do but I’m at a loss as to why this saw ran fine one day, then two weeks later wouldn’t even sputter.

How to fix spark, gas, compression, ignition?

Then change it again, they are cheap! If you have fuel, compression and ignition…….at the right time……it has to run, it has no option! As Fish said check the flywheel key and the air gap between the coil and magnet if the above doesn’t solve the problem.

Got the cylinder plug for my 357xp to replace the auto decomp valve, and the compression seems good. I know, I need to do a compression test to be sure, but it feels like the compression is good and I can suspend the saw (with bar attached) by the starter rope and it holds.

I know, I need to do a compression test to be sure, but it feels like the compression is good and I can suspend the saw (with bar attached) by the starter rope and it holds. I don’t have a compression gauge, so that’s why I don’t have a reading, but I’ll get it measured as soon as I can.

I have spark, and after repeated cranking the plug is moist with fuel, so I think I have spark, fuel, and compression, but it won’t even sputter, nothing at all. I thought about pulling the carb and doing a rebuild, since that’s fairly easy to do but I’m at a loss as to why this saw ran fine one day, then two weeks later wouldn’t even sputter.

What causes a snowmobile to have low compression?

If you have low compression, you will need to take the head off and check it out. Low compression can be caused by worn out piston rings, a scored cylinder or piston, bad crank seal, reed valve or a bad head gasket. Follow our guide on how to do compression tests to see if this is your issue.