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Monsoon 340 long block cost?


Ryan Gergler

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I was just informed that cylinder number 3 has 0 compression. The plug at number 3 is white and the guts were broken off and obsorbed in the cylinder causing catastrophic engine failure. Likely cause is a bad fuel injector. No fuel caused the plug to overheat and fall apart.

Has anyone had this problem? They are working the numbers tomorrow, anyone know how much a long block installed may cost?

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Ryan.....that totally sucks! Here is a bit of good news. Long block from Marine Power USA is approx. 2700 plus 200.00 or so in shipping. You have an awesome mechanic practically in your back yard. He just did an engine for me and his price was more than fair. I am going to PM his info.

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Been there, done that. Typically when you "drop a valve" or anything into a running engine, the piston will shatter and it goes downhill from there. If you're lucky, you could either sleeve the cylinder or bore the entire block, assuming the damage to the cylinder wall isn't that bad and assuming you can get oversized pistons. Yea, I know, a lot of assuming, but you won't know until you tear it down. Good luck.

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