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Low compression on 99 Ultra 150

All 3 cylinder are 60-65.  Is there any issues with testing compression on these.  I have an inexpensive harbor freight compression tester.  It has always worked fine.  I just bought this Ski and know...

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Re: Low compression on 99 Ultra 150

seems strange that all cyl. read that low,i would try another guage because the oring on the guage can wear out after awile an give you a false reading then go from there.

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Re: Low compression on 99 Ultra 150

My harbor freight guge reads about 20-30PSI lower than a good craftsman or snapon gauge.

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Re: Low compression on 99 Ultra 150

I am now trying to remove the pump to try to isolate the slow crank problem that may be causing the low compression. I can't seem to get it loose. I guess the ski was in salt water more then I...

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Re: Low compression on 99 Ultra 150

some guys have made pullers to get them off. I was lucky and was able to pry mine out from the side but I did chip my gelcoat alittle while doing it. Do a search on pump puller on here and you should...

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Re: Low compression on 99 Ultra 150

here is a link to the puller. http://ultra150.yuku.com/reply/18229#reply-18229

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Re: Low compression on 99 Ultra 150

Does anyone have a puller for rent or sale?

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Re: Low compression on 99 Ultra 150

I could not get the pump off, so I unbolted the motor and pulled it back from the pump.  The good news I do not need to pull the pump.  It seems very smooth.  The bad news is there is a slight bind at...

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Re: Low compression on 99 Ultra 150

It turns out that I have 2 problems. The starter was bad causing it not to turn over fast enough. After changing the starter the compression is 90, 120, 120. The second is some scoring to the front...

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