GX200 Generator engine conversion problem

[twcxz]

Ok, so here goes.

A few months ago I bought a 196c generator engine. It's very similar to a Honda GX200 (It fits GX200 parts, etc.)

The engine came with a crankshaft with a conical end on it, to drive a generator, so I bought a standard 3/4'' crankshaft, for a clutch. It fit, but with some major problems.

The engine wouldn't complete a full rotation, at TDC on the crankshaft, the piston protruded out the top of the cylinder. at BDC, the piston hit the counterweight.

When I look at the piston, compared to a photo of a standard one, It has a cross hatch pattern on the sides, which the standard one doesn't have.

The rod looks a little different to the standard one, too - at the top.

So, my question is, Where's the problem? is it the piston or the rod? Has the 196 got a different piston? is the rod too long? too short? Or did i buy the wrong crankshaft?

See the attached photos for more info.

Sorry for the long post

Thanks.

Below are the imgur links for the photos

https://imgur.com/a/MXmXFik
https://imgur.com/a/ZRbcZNz
https://imgur.com/a/LtxrQHg
https://imgur.com/a/dDUUv0P
https://imgur.com/a/1K3Xnio

 

[Kaptain Krunch]

Sounds like your new crank has a longer stroke. Carefully measure each crank, side by side and report back.

 

[J.S.@SMS]

Are you sure that it's a 196 clone. A gx160 clone (they exist) uses the same block as a gx200, but it has a 9mm shorter stroke. The only way to tell is the stroke, because the bore is the same.

 

[twcxz]

Are you sure that it's a 196 clone. A gx160 clone (they exist) uses the same block as a gx200, but it has a 9mm shorter stroke. The only way to tell is the stroke, because the bore is the same.

Hi there,

As it turns out, that is correct.

Thanks!

 

[J.S.@SMS]

So, you're going to need a 160 crank.