454 Flywheel Differences
09-25-2025 | 11:06 AM
#11
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From: Waldorf, Md
09-25-2025 | 03:21 PM
#12
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From: Omaha/LOTO
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.
All your posts show your IP Address is in the Netherlands. Care to explain??
09-25-2025 | 03:29 PM
#13
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From: Midwest & T-Rock
10-07-2025 | 03:32 AM
#14
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From: Holland MI
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
10-07-2025 | 06:23 AM
#15
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From: Waldorf, Md
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.
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.
10-07-2025 | 08:40 AM
#16
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From: Holland MI
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.
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.
