which flywheel to fit nitro buggy engine .21 with sg style shaft

[Andre girouard]

Hello all. This is probably an old topic for some but im looking at powering a small deep vee with a .21 dynamite nitro buggy engine that has a sg style shaft, typically found on these engines. Looking for a marine type flywheel that will fit out of the box, the threaded part of the shaft has 1/4-28 threads. I know nova rossi sells a kit to use car engines in cars but at $90, too costly. There are thin flywheels available on ebay like the gp18, which are made for .18 engines. Looking at older internet threads i see that the os Flywheel for .15-.18 engines is used but that has been discontinued. Octgura has flywheels but they would require machining. Any info is appreciated.

 

[BobSmith1]

Hello all. This is probably an old topic for some but im looking at powering a small deep vee with a .21 dynamite nitro buggy engine that has a sg style shaft, typically found on these engines. Looking for a marine type flywheel that will fit out of the box, the threaded part of the shaft has 1/4-28 threads. I know nova rossi sells a kit to use car engines in cars but at $90, too costly. There are thin flywheels available on ebay like the gp18, which are made for .18 engines. Looking at older internet threads i see that the os Flywheel for .15-.18 engines is used but that has been discontinued. Octgura has flywheels but they would require machining. Any info is appreciated.

I have one that might work, will post a picture, if good it's yours just the shipping

 

[Andre girouard]

ok thanks.

 

[Andre girouard]

Where did you get it from ?

 

[shoboat]

Andre,

We just cut the end off of the crankshaft and
thread the collet on.

Thanks,

Mark

 

[Andre girouard]

What do you use as a flywheel, where does the starter belt fit ? Thx.

 

[BobSmith1]

here is one I have, looking now for others...

 

[BobSmith1]

another one

 

[Andre girouard]

Hello. Happy thanksgiving. Looks like its something that will work. Do they both have thin shoulders, the part of the flywheel that rests on the collet ? Thx.

 

[BobSmith1]

Hello. Happy thanksgiving. Looks like its something that will work. Do they both have thin shoulders, the part of the flywheel that rests on the collet ? Thx.

Happy Thanksgiving, they both look like they would fit a 1/4" shaft

 

[shoboat]

Andre,
We use O.S. Flywheels and then put on the collet.

Thanks,

Mark

 

[Andre girouard]

Andre,
We use O.S. Flywheels and then put on the collet.

Thanks,

Mark

Which part #,any idea ? Os #71801050 for .15-.18 has been discontinued, this is what people used to use according to old threads, going back 20 plus years.

 

[shoboat]

Andre,
You can find small flywheels on eBay and other sites.
Novarossi made plenty of them for their marine engines
as well. You can machine down other flywheels if you have
a lathe.

Mark

 

[Andre girouard]

Happy Thanksgiving, they both look like they would fit a 1/4" shaft

 

[Andre girouard]

Hi.. Please let me know what shipping would be for the 2 flywheels. Zip code is 85004. Thks.

 

[Daniel's Racing]

https://www.ebay.com/itm/3145733186...lp:2332490&itmmeta=01JE7DWBJ7D7FGF5X3K1Y7YP44

 

[Andre girouard]

Thanks! So thats a guaranteed fit no machining required ?