KubotaKid24

Looking at a used (18 hour) aquatrax. Wanting to find out factory acceptable compression range. actual cyl 1 175psi, cyl 2 170psi, cyl 3 175psi, cyl 4 160psi. Just a little gun shy buying used. Recently cooked my 1999 Yamaha xl 1200 having 98-115 psi compression with only 62 hours on it.

Thanks for your input.

jrinjax

Usually after being run for a while and the throttle WOT with all the plugs removed, you should have at least 190 from what I remember. Lower readings are frequently salt water corrosion in the valves from water intrusion.

glockm22

I'm pretty sure that the manual calls them for 171psi for compression. and 180psi on non turbos

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