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lorne

09-06-2004 04:48 PM

zz 502

I have a502zz in a 30 foot wellcraft,I am on my third engine rebuild.I lowered the compression to around 8.5-1.The engine is .060 over sized.I only got 20 hours on it when I lost compression on #4 cylinder,all three engine jobs failed on #4 cylinder.Can any body tell me what could be wrong?Thank-You Lorne.

cooltoys61

09-06-2004 06:33 PM

Re: zz 502

When you say engine job failed on #4 what do you mean? Just compression? Bearings/pistons? If just compression maybe you just need a detailed look at the head on that cyl.

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