I have a 2000 OX66 and the highest compression on any cylinder is 95, with all others within 5% of each other....Should I be worried???
I have a 2000 OX66 and the highest compression on any cylinder is 95, with all others within 5% of each other....Should I be worried???
2020 Ranger Z520L 250 Pro XS 4
if they're all within 5% id try another gauge, ill bet you're ok
So the lowest cylinder was around 90. Sounds a little low but not too bad. If this were mine I would run some engine tuner through it and shock treatment with ring free run it a while and recheck it. As long as they a even its probably OK
Could this hurt my boats performance or top end speed???
2020 Ranger Z520L 250 Pro XS 4
maybe but your numbers dont sound very low to me. The only way to fix it is to overhaul it. Try the tuner and the ringfree shock like I said and see if that helps it.
are you performing this compression test with the throttle plates wide open?????? if not do so![]()
Can you give some input on how to open the plates, thanks......
do you have a hot foot? if so pull the kill lanyard and have someone push hot foot wide open
I would like to see the difference in the numbers when you hold the throttle open. I have never found it to make much difference.