Flywheel question

[ultrafast30]

is this part no 580810??

[sharpeye Mike]

Part # is hard to read but it looks like 580904 but I could be wrong.

[ultrafast30]

Was yours turned down on a lathe. The ones I am finding have a groove for a starter rope.Maybe I need to keep looking!!

[sharpeye Mike]

No, I haven't turn it down yet, mine has a small grove on top of the ring gear for a rope also. Stinger has a picture of it on post 5, that's the one you want.
Mike

[sheuninck]

mine weight 9 lbs.
see pics

[Billsboats]

on a 3 cyl 75?

[sheuninck]

the 71 and less had the coils under the flywheel, the 72 did not, the 73 and on where the 10lbs flywheels. The old EP and FE rules called for the 10lbs flywheel. Mine work as i have raced with them with part #580810. the brp site says the part number is 580956 http://epc.brp.com/ There is minor interference with the potted type timer base at the inner top radius. Either machine the timer base potting or the flywheel.

[sharpeye Mike]

Ok, well mine is similar but not exactly the same, for example serial # is 580904, the ring gear is set at the very bottom of the flywheel, has two series timming # from 36* to tdc and mine actually wheighs in at 8.2 lbs, the darn thing gained 0.4 lbs, that's what happens when they get into the chocolates.
Sorry for the lack of pics but I'm not a gadget guy, I just figured out how to stop the vcr from flashing 12:00....I put a piece of tape over it.
Mike

[Billsboats]

there are a few 72 65 hp flywheels on ebay but that one you are talking about the 580904 is not coming up do you know what the application is for it?

[sharpeye Mike]

I hear ya, i did a search on it too and came out with nothing. All I can tell you is that the flywheel did come from a 65 hp, I was there when the guy took it off and because of the shape off it, I didn't question the year. Now I know it wont just slip on, there's a small ridge on the inside to machine out other than that it should fit like a glove,,,umm with the help of a ballpeen hammer.
Mike