Got a used Zenoah 260 that I am overhauling and removed the bearings from the case. When I removed the bearing from the out put end I noticed there was a machined groove in the case. Looks like a snap ring groove but it was empty.Does a snap ring go there?

Yes one does and needs to be there for crank to have correct thrust spacing between bearings.

Thanks Scott. I am going to try to port this motor as per your Zen porting article. Don't have much invested in it so it's worth a shot. Been into alot of engines over the years but not like these.

I'm new to two stroke engines, could i ask where I could fing Scotts' atricle?
I'm running Zen 260 in a stock class, but have one in a GX sport hydro also.
Pat

<strong>tapkoote wrote:</strong>
In the Technical Articles section. Here is a direct link to that article: www.modelgasboats.com/Magazine...Engine_Porting/

thank you Karma
I'm going to "give it a try" engine mods this winter
Tap