Hey all,
Thought some of you might be able to answer a couple questions I have regarding my first rebuild.
Snowmobile in question is an '85 XLV with a 535cc.
Just completed my first rebuild where I had the cylinders bored and honed to new oem pistons .20 over. Just got everything put back together and it fired immediately. I also installed new Boyesen reeds. I went to check compression and I'm just over 100psi in both cylinders, both have roughly the same compression. I have cleaned the carb (only 1 on this model) and premixed the fuel along with utilizing the oil injection.
I ran it the other night on a stand, after warmup I gave it some throttle to break the track loose from sitting all summer. I killed the engine (not from Idle) and checked the plugs. The PTO side had a carbon deposit on the metal tip and the MAG side had oil on it. Note: These were new plugs BR9ES and both are getting spark.
I started up the sled again and pulled the MAG side plug wire off so its just running on the PTO cylinder and it never lost a beat. I did the opposite so it was running on the MAG side and I needed to give it some throttle to keep it going but it did run.
My question is: Is this all normal? Will I most likely see an increase in compression after a tank of gas?
Thanks!
Thought some of you might be able to answer a couple questions I have regarding my first rebuild.
Snowmobile in question is an '85 XLV with a 535cc.
Just completed my first rebuild where I had the cylinders bored and honed to new oem pistons .20 over. Just got everything put back together and it fired immediately. I also installed new Boyesen reeds. I went to check compression and I'm just over 100psi in both cylinders, both have roughly the same compression. I have cleaned the carb (only 1 on this model) and premixed the fuel along with utilizing the oil injection.
I ran it the other night on a stand, after warmup I gave it some throttle to break the track loose from sitting all summer. I killed the engine (not from Idle) and checked the plugs. The PTO side had a carbon deposit on the metal tip and the MAG side had oil on it. Note: These were new plugs BR9ES and both are getting spark.
I started up the sled again and pulled the MAG side plug wire off so its just running on the PTO cylinder and it never lost a beat. I did the opposite so it was running on the MAG side and I needed to give it some throttle to keep it going but it did run.
My question is: Is this all normal? Will I most likely see an increase in compression after a tank of gas?
Thanks!