PDA

View Full Version : 1997 Mercury 90 flywheel magnets



pyrodenis
09-03-2019, 11:25 AM
All 6 of my flywheel magnets are loose and 3 are broken. I'd like to find new magnets and do the repair myself. Anyone know a resource? The flywheel is 261-9007-C3 (probably not original). The i.d. of the flywheel is 192mm (7 19/32") and the i.d. of the magnets is 170mm (6 3/4").
Can anyone guide me?
Thanks,
Denis

fastjeff
09-04-2019, 08:56 AM
Do yourself a MASSIVE favor--simply buy another flywheel on Flee Bay.

Jeff

RickM46
09-04-2019, 06:09 PM
The flywheel mags on my '92 40hp 4cyl 2 stroke are glued on; don't know what kind of adhesive Merc used; trying to reattach the mags can be problematic as there is very little clearance between the mags and the multiple heads on the stator; I would just get a new flywheel rather than risk destroying the stator - CDI replacements start at around $280. Also, the flywheel and magnets are probably balanced to minimize vibration.

fastjeff
09-04-2019, 08:23 PM
also, if that thing comes apart at 5,000 rpm....

Jeff

pyrodenis
09-06-2019, 09:08 AM
thnx all. I bought a used one off ebay. Not worth the misery of getting stranded. While waiting for it, I did glue up what I had and it's producing spec voltage.

fastjeff
09-06-2019, 10:13 AM
Smart move!

Jeff

pyrodenis
09-06-2019, 09:12 PM
So, the ebay purchased flywheel doesn't fit. The taper angle seems correct, but a smaller diameter.
I bought a 261-9007-C2 to replace a 261-9007-C3.
On marineengine.com I found that the original was 261-2008A58, replaced by 261-859234T12, replaced by OEM 261-878226T10. (This is using serial# from the freeze plug, as no other serial# can be found.)
I found another on ebay with both 261-9007-C3 and 261-878226A2 stamped on it.
Does anyone know about this taper difference? Thinking I should get this other one.
Thanks,
denis