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-   -   454 Flywheel Differences (https://www.offshoreonly.com/forums/general-q/386519-454-flywheel-differences.html)

BillK 09-25-2025 11:06 AM


Originally Posted by F-2 Speedy (Post 4935378)
Ya I reported raray but nothing has been done to remove it

Thats funny because I did too. Mainly because the info is not really correct and could cost somebody if they dont know any better :(

Griff 09-25-2025 03:21 PM


Originally Posted by boostbros (Post 4935367)
Raray888 has to be an AI bot no one talks like that in the marine mechanical world

Yeah, I've been keeping an eye on him/her/it.


Originally Posted by Raray888 (Post 4935357)
The 454 is externally balanced. The flywheel is specific to balance the engine. Your Crusader and Mercruiser flywheels are not interchangeable. The starter spinning is because you have a mismatch between the flywheel's ring gear and the starter's engagement type (inertia vs. permanent magnet). You need the correct flywheel for your specific Mercruiser application.

Your profile says you're a marine mechanic in the United States. Where at ???
All your posts show your IP Address is in the Netherlands. Care to explain??

F-2 Speedy 09-25-2025 03:29 PM


Originally Posted by Griff (Post 4935404)
Yeah, I've been keeping an eye on him/her/it.



Your profile says you're a marine mechanic in the United States. Where at ???
All your posts show your IP Address is in the Netherlands. Care to explain??

Ive never seen it respond ( quote ) to someone else's post

Ryanw10 10-07-2025 03:32 AM

Flywheel removed. Looks like i need to take the ring gear off completely and flip it? There's around an 1/16" thick piece of steel between the Flywheel and the ring gear and it's wider than the ring gear? Both flywheel shown with crankshaft mounting surface facing up
https://cimg1.ibsrv.net/gimg/www.off...437aa08303.jpg
https://cimg7.ibsrv.net/gimg/www.off...801915ca2f.jpg

BillK 10-07-2025 06:23 AM

Correct. Knock the old ring gear off with a brass punch and a big hammer. Stick it in the oven at 450-500 degrees for 30 minutes and it should fall right back onto the other side of the flywheel. If it does not go all the way on you can use the hammer and punch to seat it all the way. Make sure and take some sandpaper and clean all of the paint and rust etc off the flywheel where the ring gear will sit.

Which flywheel is the one from your engine ?? Just want to mention that the second flywheel has been custom balanced to match a particular engine. I am saying that because of the row of smaller holes I can see drilled in it. It should not be used on any engine other than the one it came from.

Ryanw10 10-07-2025 08:40 AM


Originally Posted by BillK (Post 4935989)
Correct. Knock the old ring gear off with a brass punch and a big hammer. Stick it in the oven at 450-500 degrees for 30 minutes and it should fall right back onto the other side of the flywheel. If it does not go all the way on you can use the hammer and punch to seat it all the way. Make sure and take some sandpaper and clean all of the paint and rust etc off the flywheel where the ring gear will sit.

Which flywheel is the one from your engine ?? Just want to mention that the second flywheel has been custom balanced to match a particular engine. I am saying that because of the row of smaller holes I can see drilled in it. It should not be used on any engine other than the one it came from.

First one is the one from the engine im running. Second picture is the Flywheel from the old engine. Some backyard mechanic cobbled it together, lasted 3 hours after supposedly being rebuilt and lost a lifter.


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