here is a pic of a 3250 I have been doing, converted to gas will be ok on 50:1 mix . Has needle bearing rod and hard pin in crank.

Looks good.
The 3250s we have done, have real good power, a full step up from a 3000.

hered that Evolution had yoy for lunch today

Sweet,I've been looking for treads the last couple days on this topic. I just bought a ST G-4500 that I want to covert to gas,and am gonna need lots of help. I'm gonna need to know if/how I need to convert it over to needle bearing. I'll need to know what kind of gas mixture to run in it. And I'll need to know what kind of spark plug to run in it. And what I should do with the carb.

Good work Ken.

Looks like you have all the bases covered

Nothing that a 3lb nonsparking brass hammer couldn't deal with[>:]

You can run it with out converting it to needle bearings.
You just need to keep the oil ratio the same.

You may want to look into Gas/Glow.
There are two threads here on RCU that cover it pretty well.

I run all mine on 50:1 Klotz synthetic/ KL 310, I run every thing the same so I only have one fuel can and 1 mix , and I enjoy doing the engines. I haven't been staying up with gas glow ,I havent purchased glow fuel in years .

Ken
Santa will be there soon, better late than never.

thanks, can't wait

Santa just came to Texas thanks , what a surprise!!!!

No problemo, should keep you out of the honky tonks for awhile.

. . . and TX has some Hoooonky-Tonks!

Jack

I am not allowed in them , said I was too ugly and scared all the custamers off.

here is a link to a video of the engine running . First run
http://www.youtube.com/watch?v=qcu_3ihCxZo

Ken,

Have you played with changing the compression ratio at all?

Aren't the compression ratios in gas engines generally a tad higher than in glow?

Mike

very nice. Does it damage an engine at all running with out exhaust?

the compresion is up
I don't run them long without mufflers but it shouldn't damage it for short runs, just the ear drums

thanks, thats good to know. I have been dying to get my stihl running, but i dont have a muffler yet. Ill just wear ear plugs

I am converting a Stihl FS-72 and would like to know where did you get the prop adapter for your engine? Keep us posted on how it runs.

Lambert
Do you sell these carb adapters. I would like to convert my ST 2000 to gas.

yes they are for sale on RCU and my site

Ken,

I got the conversion parts for my 2500 today. They look great, Thanks.

Just waiting on some CM-6 plugs, 10mm plug cap kit and a tap and drill bit.

Sorry if this sounds stupid but the brass spacer that goes on the crankshaft, does the inner diameter bevel go towards the crank, or towards the front bearing?

Thanks,
Mike

Now what oil ratio are we talking about? The ratio for the glow fuel or the 40:1 ratio for gas.

To run the big ST on gas with a stock rod you use a 10:1 oil mix (10%)