What should compression be on a snowmobile?
New it should be around 140+psi. When it gets to less than 120 or has more than 5k miles on it, a top end refresh is a good idea.
What is good compression on a 2 stroke snowmobile?
A two stroke or ANY internal combustion engine will not fire below 100psi of compression. 100 is VERY low sleds with good motors should be over 120psi and 135-145 is kinda a target number on pump gas that is.
What should the compression be on a 800 ETEC?
I believe the normal compression should be around 150psi.
Is 150 compression good?
150 psi is considered a good compression. Low compression is lower than 130. The cylinder should be within 10%.
What is considered low compression on a snowmobile?
The optimal compression is 120 psi (pounds per square inch) or greater. Anything below 110 could signal a potential issue, and an engine typically won’t run with much less than 100 psi compression. You also want to make sure the compression is equal in all cylinders.
What causes low compression in a snowmobile?
If you find the compression in one or all cylinders is low, the problem could be scored cylinders or pistons, a damaged crank seal, piston rings that are worn out, or a defective head gasket.
What is normal cylinder compression?
100 psi
Healthy engines should have compression over 100 psi per cylinder, with no more than 10 percent variation between the highest and lowest readings. With a compression tester, a few hand tools, and 20 minutes, you can try this yourself.
Can you run a snowmobile with low compression?
The optimal compression is 120 psi (pounds per square inch) or greater. Anything below 110 could signal a potential issue, and an engine typically won’t run with much less than 100 psi compression.
What is low compression in a snowmobile?
When did Ski Doo introduce the two stroke triple?
Ski-doo introduced their new Blizzard race sleds in 1970 with 636 and 776cc twins. Ski-doo had a successful season in 1970 but the writing was on the wall. The horsepower war was ramping up and to compete with the “Honker” motors Rotax would up the anti in 1971 with new free air 645 and 797cc triple/triples.
What was the displacement of the Arctic Cat Ski Doo?
Yamaha engineering believed the twin cylinder motors that Arctic Cat and Ski-doo were still using was limited in displacement to 600cc due to detonation issues given the lack of engine monitoring electronics and fuel induction technology available at the time.
What kind of engine does a Ski Doo snowmobile have?
Bones–Stator from a 340 F/A with a hub that is too small to fit a `75 crank & engine has a single carb….You most likely got the hub froma `77/78 – 340 F/A, doo you have the whole engine The stator from that engine would work great in a `73/75 conversion.
What was the track for the 71 Ski Doo Blizzard?
The new Ski-doo triple-cylinder Blizzards were built on a wider tunnel using a 16.5” wide track vs. the 15” track used on the twin-cylinder versions. The ‘71 Blizzard had these big triples sitting right there in your lap with the motor mounted on top of the tunnel.
