normal compression ??

[hdkawi]

just did a compression test on my sleds rt 1000 145 psi pto 150 psi mag
05 rmk 900 100-105 psi
09 rmk 800 100-105 psi
r the polaris engines on there way out ? do they just have lower psi. all r stock

 

[Bnorth]

You're a sucker for punishment. Those three motors probably have the worst rep of any sled motor ever lol. The rt1k is within spec.

 

[hdkawi]

lol so u r saying the rmks r running low

 

[hdkawi]

You're a sucker for punishment. Those three motors probably have the worst rep of any sled motor ever lol. The rt1k is within spec.

got the fix kit for the 800 just trying to decide if i need to do it now or a little later

 

[ferniesnow]

got the fix kit for the 800 just trying to decide if i need to do it now or a little later

Maybe cheaper to doo it now rather than a little later…..just saying.

 

[hdkawi]

so 95-105 is low whats normal?i was suprised that my rt was around 150 that seems high
i thought normal was 110-125

 

[neilsleder]

Compression will depend on alot of things like altitude, warm or cold engine, how long ago was the motors last run, if they have fogging oil still in them. But I would say the Polaris motors are low. I would do the fix kit now if you have it. It's only a few hour job. And I'd your motor blows up back in a few bowls then you have a Heli ride on top of that.