what is compression on mercury optimax 175

[jbutlerjr]

can someone please tell me what the compresion is on a mercury optimax 175. thanks for any help.

 

[Overnighter20]

Re: what is compression on mercury optimax 175

can someone please tell me what the compresion is on a mercury optimax 175. thanks for any help.

Good luck finding a specific number, most important thing is that all cylinders are pretty much the same, all within 10% preferably.

 

[ENSIGN]

Re: what is compression on mercury optimax 175

I agree and make sure the test is done on a warm engine with the throttle open

 

[Hackamore]

Re: what is compression on mercury optimax 175

If my memory serves me right it should be between 110# and 130# for the motor to perform with the power it should. Others are right there is now set, this is just for it to perform at its best. Anything below the low is usually caused from ring problems. Good luck