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Old 06-21-2011, 06:50 PM   #1 (permalink)
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Default Ultra 150 low compression
I bought this ultra 150 2 weekends ago. One of my cylinders compression is at 102 the others are 118 and 120. The ski has been running ruff and will not go over 3k rpms on the water or over 7mph. Could the lower compression be why?
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Old 06-22-2011, 11:34 AM   #2 (permalink)
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Anyone. Right now I'm tearing the heads off to see
Last edited by korizmo; 06-22-2011 at 03:08 PM.
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Old 06-22-2011, 06:28 PM   #3 (permalink)
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Well I took of the cylinder head and everything looks good with no damage to the cylinder walls. I guess it's ring replacement time.... Could having slightly low compression in one cylinder make a ski run like crap?
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Old 06-23-2011, 06:31 PM   #4 (permalink)
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ISSUE SOLVED - took off my carbs and i'll be damn the whole float pin assembly came out. haha so the first cylinder was flooding with gas. Too bad some damage has been done though 102 compression. O well at least it will run again....
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Old 06-23-2011, 09:36 PM   #5 (permalink)
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Good to hear you found the problem but 102 psi of compression is walking the fine line. Anything under 100 and it's top end time.
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