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Jet Boats
General Jet Boat Discussions
Bad news...Piston cracked.
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<blockquote data-quote="bnt5" data-source="post: 387727" data-attributes="member: 13957"><p>Noticed the jetjon running a little rough and had a hard time getting any throttle response....hmmmm....Got home and did a compression test, rear cylinder was way low. Pulled the top end off and found a chipped piston. The cylinder walls are still in great shape, one has very slight scoring that I can feel with my fingernail barely and the other is perfect, a good honing should take care of them in preparation for the new pistons. I don't know what caused the rear piston to go, I am running premix gas at 50:1, possibly the carb was lean or fuel pump issue? I am going to rebuild the carbs and do a leak down test once everything is put back together. Any other suggestions to finding the reason of a blown piston? Also the cylinder head has some pitting and damage from the piston would it still be ok to use if cleaned up?</p></blockquote><p></p>
[QUOTE="bnt5, post: 387727, member: 13957"] Noticed the jetjon running a little rough and had a hard time getting any throttle response....hmmmm....Got home and did a compression test, rear cylinder was way low. Pulled the top end off and found a chipped piston. The cylinder walls are still in great shape, one has very slight scoring that I can feel with my fingernail barely and the other is perfect, a good honing should take care of them in preparation for the new pistons. I don't know what caused the rear piston to go, I am running premix gas at 50:1, possibly the carb was lean or fuel pump issue? I am going to rebuild the carbs and do a leak down test once everything is put back together. Any other suggestions to finding the reason of a blown piston? Also the cylinder head has some pitting and damage from the piston would it still be ok to use if cleaned up? [/QUOTE]
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Jet Boats
General Jet Boat Discussions
Bad news...Piston cracked.
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