Mercruiser 4.3 mpi rattle when stopped

QBhoy

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:D Always a gem hidden somewhere. ;)

With that bit of information, I'm going to postulate that something is loose. I'd be looking at balancer bolt, crank pulley screws, anything else that was loosened in the process of replacing the balancer.

Chris......

Ah. Ok. Glad you have suggested this Chris. I thought I had mentioned this originally. Looks like I didn’t. I have literally only heard it run once or twice before and once or twice after. But I’m certain I would have noticed this noise previously, if it was there. Especially when we serviced it just before.
No doubt we have something to look at now. Thanks.
 

QBhoy

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Why is this video 2 years old? Is this a new problem, or an old problem being re-investigated? It's also a TKS engine, and the original was an MPI....

:noidea:

Chris.........

Chris. Read the post I put on and you’ll understand it. Cheers.
 

achris

More fish than mountain goat
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Chris. Read the post I put on and you’ll understand it. Cheers.

Ok, so the video in the first post is the engine you're actually working on. This latest video is one of a 'similar' noise...

Not by my ear. That second video is definitely a loose 'something'.. The noise in the first video is the same as the noise my engines (2006 MPI and 1994 4.3LX) have always made. And that noise is the backlash of the balance shaft gear...

Chris...
 

QBhoy

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Ok, so the video in the first post is the engine you're actually working on. This latest video is one of a 'similar' noise...

Not by my ear. That second video is definitely a loose 'something'.. The noise in the first video is the same as the noise my engines (2006 MPI and 1994 4.3LX) have always made. And that noise is the backlash of the balance shaft gear...

Chris...

Yeah. That’s right. Ok. Thanks for that Chris. He is having a panic about it. His engine seems to take a wee while to come to a stop. Instead of stopping dead
 
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