New starter grinding

[pensacola]

Hello I am having a big problem with my starter.
I have a 1999 bayliner 2050 capri. It has a Mercruiser 5.0 engine
I was having problems with it starting and I had to rebuild the distributor. Once I did that we had to mess with the timing for awhile then it started a couple times and then the starter went out. So I replaced the starter and now its grinding on the flywheel. I tried to shim it with every combination possible and it is still grinding. Please help me I am so frustrated with this thing.

 

[Don S]

Re: New starter grinding

What starter did you put on it?

 

[pensacola]

Re: New starter grinding

They gave me a Arco 30470 to put on it.

 

[pensacola]

Re: New starter grinding

I am looking on mercury marine and then arco and cross reference them and i am getting a 30433 part number. Would that make a difference?

 

[Don S]

Re: New starter grinding

Have you checked to make sure the pinion gear on the new starter is the same as the old one you took off?
Is it engaging the ring gear, or just hitting it?

 

[pensacola]

Re: New starter grinding

Its engaging it and it will turn it over. Its like on the third revolution when it grinds.

 

[Coors]

Re: New starter grinding

Pull the starter and use a flashlight to see if any flywheel teeth are damaged at that spot.

 

[pensacola]

Re: New starter grinding

There is some damage on the teeth of the fly wheel. But not enough to make it eat like it is I wouldn't think.

 

[pensacola]

Re: New starter grinding

Another question is will this happen if the timing is off?

 

[Coors]

Re: New starter grinding

only a very little maybe if advanced far enough.
The story is, a v8 flywheel always stops at one of the same 3 places, giving a 30% chance of landing on the bad teeth.

 

[Don S]

Re: New starter grinding

When you was playing with the timing, did you actually put it in base timing mode and set it correctly or just try it by ear?

 

[pensacola]

Re: New starter grinding

We just did it by ear. I need to take it somewhere and have them put a timing light on it. Could this make it grind on the flywheel?

 

[Don S]

Re: New starter grinding

No, it won't make it grind, but a lot of kicking back when the timing was way off may have caused the damage to the ring gear and starter which was possibly the beginning of the whole problem.

 

[pensacola]

Re: New starter grinding

well we didn't have any problem until I replaced the starter. So I am convinced that it has to be the wrong starter.

 

[Don S]

Re: New starter grinding

50-863007A1 is the Mercruiser starter number. You will probably find it's cheaper than the aftermarkets. Be sure to get NEW bolts for it too.

 

[pensacola]

Re: New starter grinding

Thats what I found and when I go to Arco.com and cross reference it I get a 30433 part number where they gave me a 30470 starter. So I am hoping they have a different bendix and that is the problem.

 

[Coors]

Re: New starter grinding

Maybe you can get a dremie in there, and somewhat debur the ring gear.

 

[pensacola]

Re: New starter grinding

Anything would be better than pulling the engine again for $700.

 

[fishrdan]

Re: New starter grinding

I'll let the marine expert's qualify my suggestion, but here it goes.

I had a Chevy 350 with starter wine and adding shims wouldn't fix the problem, adding shims actually made the noise worse. It turns out the starter was too far away from the flywheel and I needed to file 1/8" or so (can't remember) off the starter mounting pad to solve the problem.

How does the starter wine change when you add the shims, the same, more wine as shims are added, less wine as the shims are added? Have you compared the distance from the mounting pad to the gear on the old and new starters?

 

[pensacola]

Re: New starter grinding

They are telling me that those two starters are the same and its because I am getting hydro lock is why its grinding.

As for the shims it doesn't change for the first two then it starts to miss when I put all three.