Flywheel Replacement

[Pirate4Life]

I've got a 1997 Mercruiser 5.7 EFI (Alpha 1). It looks like I have a couple of broken teeth on my flywheel so the starter is not engaging properly. So I need to replace the flywheel. Before I take this thing apart where should I look to get the specs for my flywheel? (I bought the boat used, so I have minimal original documents/manuals.) I know the serial numbers for the engine, transom and drive. Is there a way I can use these numbers to look up the flywheel info somewhere? Also, do I need to use a Mercruiser part, or can I use an aftermarket part? I've noticed on eBay there's a lot of GM parts out there. I'm new to the boating world so I appreciate anybody's guidance on this issue or any other boating tips you'd like to share.

 

[Bt Doctur]

Re: Flywheel Replacement

all you need is a ring gear, it comes off with a hammer and drift, new one drops in place after heating it in an oven.

 

[Bondo]

Re: Flywheel Replacement

I've got a 1997 Mercruiser 5.7 EFI (Alpha 1). It looks like I have a couple of broken teeth on my flywheel so the starter is not engaging properly. So I need to replace the flywheel. Before I take this thing apart where should I look to get the specs for my flywheel? (I bought the boat used, so I have minimal original documents/manuals.) I know the serial numbers for the engine, transom and drive. Is there a way I can use these numbers to look up the flywheel info somewhere? Also, do I need to use a Mercruiser part, or can I use an aftermarket part? I've noticed on eBay there's a lot of GM parts out there. I'm new to the boating world so I appreciate anybody's guidance on this issue or any other boating tips you'd like to share.

Ayuh,... If original, yer motor has the small bolt pattern, 1 pc. rear main seal flywheel...

as BD said, ya just need a new Ring Gear....

There's only 2 options,...
The 12" ring gear, which is used for the straight across bolt pattern starter,...

'n the 14" ring gear, used with the staggered bolt pattern starter....

 

[Pirate4Life]

Re: Flywheel Replacement

Thanks to both of you for your replies. You've been very helpful.