Offshoreonly.com - Could backfiring cause this?

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- - Could backfiring cause this? (https://www.offshoreonly.com/forums/general-q/315947-could-backfiring-cause.html)

Randy Nielsen

08-01-2014 11:02 AM

4 Attachment(s)

[ATTACH=CONFIG]527253[/ATTACH][ATTACH=CONFIG]527254[/ATTACH][ATTACH=CONFIG]527255[/ATTACH][ATTACH=CONFIG]527256[/ATTACH]

F-2 Speedy

08-01-2014 11:59 AM

Randy I don't see any way this motor ran fine any time, wrong flywheel also, no weight to remove either, if the cranks OK then get the correct wheel @ remove the weight like Mike stated and you should be good. I think :eek:

mike tkach

08-01-2014 12:22 PM

ok randy,the bearings are correct and is narrowed ,the x indicates .001 extre clearance ,the h is a high perf bearing.those are good bearings and i use them a lot.as already stated the balancer&flywheel is not correct for internally balanced engine.

Randy Nielsen

08-01-2014 06:06 PM

The shop says they are going to rebalance the crank, I have a new flywheel coming also new bearings & will reassemble myself. He showed me the balance being off so I will have him show me the balance again when he's done. He says the crank is off by about 1 1/2 oz.

FIXX	08-02-2014 12:55 AM

Quote:

Originally Posted by Randy Nielsen (Post 4163914)

i read your earlier post,,in order to get the correct ballance he neesd ewverything to determine the correct weight to ballance the crank at,,rods,pistons,piston rings and the rod bearings being used in the engine..i say he will be a little off and that harmonic ballancer,,find one that has a fixed weight on it,that one is not so good..

Randy Nielsen

08-02-2014 01:49 AM

Everything is there so he could determine the weight for the Bob weights. As far as the balancer I will see what I can do. I really am sick of spending money on people's mistakes so I will look for one in my pile of parts. I can't believe I have to stand over someone's shoulder to make sure that what I paid for actually gets done!!!

F-2 Speedy

08-02-2014 07:46 AM

Seems to be a lot of this going on in the marine industry, good luck

Randy Nielsen

08-02-2014 09:40 AM

Thanks guys for the help & education. I will post what happens when I get it back together.

Randy Nielsen

08-11-2014 12:27 PM

Got my parts back, re-re-re balanced crank, new bearings, new flywheel, &rebalanced damper. Anything special I need to do when assembling?

Griff

08-11-2014 04:00 PM

Quote:

Originally Posted by Randy Nielsen (Post 4163713)

This engine is so screwy, as far as I know from personal experience this crank and this balancer ran fine on the dyno. The flywheel is suspect. If everything gets checked AGAIN in front of me so I can see it for myself, and I reassemble it with the correct bearings at proper clearances it should run shouldn't it? Apparently the builder in Omaha was a drunk monkey or something. I will not be sending him a Christmas card!!

Who are you using????
PM me if you like.

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