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Message started by justin_o_guy2 on 06/24/10 at 06:35:40

Title: Small engine repair/maintenance
Post by justin_o_guy2 on 06/24/10 at 06:35:40

IDK if its repair or maintenance, but the lawnmower s Kohler engine started surging, terrible at idle, less terrible as RPM went up & finally, at full throttle, it was running steady. The governor was clearly the culprit, but crud, IDK hoot about those things. The weathervane type, like the 3 HP lawnmowers Ive messed wit, were enough to leave me a bit lost. This thing works different, a shaft goes thru the side of the engine, goes to?? Where?To What? IDK, BUt It was messed up so, I had to give it a shot. Anyway, after taking some parts off & tinkering around, oiling here & there, I decided to loosen the adjuster on the governor. Not a bad idea IF I woulda made some note of how the governor shaft was oriented first.. OOOps. put it together & started it, It was headed for Full RPM & I shut it off, did that 3 times b4 I got it adjusted about right. Now, the surge is gone, running fine & I dont have one solitary clue what was done to make it work.
Anyone ever mess with these things? Can you tel me what I did & what to do next time? Or am I stuck with the Braille method?

Title: Re: Small engine repair/maintenance
Post by T Mack 1 - FSO on 06/24/10 at 12:30:25

Hey Justin,
Welcome to the small engine world.

I have old mini-bikes (Rupp's) that use tecumseh engines. Most small engines use a centifical govenor setup. L-shaped weights fly out, push a bobbin against a lever/rod that goes thru the block. The lever attaches to the arm you adjusted.

Tecumseh has a setup procedure in a docuement I have electronically. I'll try and find where I have it and sent a link in a PM.

What I remember... with engine off, pull throttle to WOT, and adjust arm to full .... (aaaaa was it CW or CCW????? ). What I remember is that it made the mini-bike slow and I tweaked it a bit ....

Title: Re: Small engine repair/maintenance
Post by justin_o_guy2 on 06/24/10 at 20:16:07

Cool, man, Id like to have some real info. If you find it, fire it on over. Thanks.

Title: Re: Small engine repair/maintenance
Post by runwyrlph on 06/26/10 at 08:01:30

4C3555797B7329180 wrote:

i'd like a copy of that tecumseh info if it's possible - trying to resurrect/build a go kart for my kids!

Title: Re: Small engine repair/maintenance
Post by Phelonius on 06/26/10 at 13:03:38

It's just PFM

Phelonius

Title: Re: Small engine repair/maintenance
Post by T Mack 1 - FSO on 06/27/10 at 19:21:25

Took a while to remember where I had it saved.

I had found this as a free download from the Tecumseh website several years ago.

Click---> Tecumseh Manual (http://www.users.fast.net/~tommack/692509.pdf)

T-Mack

Title: Re: Small engine repair/maintenance
Post by serenity3743 on 06/29/10 at 10:34:07

Wow, thanks. My 13 yo twin boys and I are restoring a go-kart. This manual will help a lot!

Title: Re: Small engine repair/maintenance
Post by T Mack 1 - FSO on 06/30/10 at 13:05:01

I used the manual on my first thumper.

1971 Rupp Roadster.

Yep, that's a snowblower motor on there. Bike looks bigger than it really is, but will do somewhere between 45 & 50 mph. And on something that small that 's a little scary.

http://home.ptd.net/~tommack/Minbike_photos/Rupp-Tom3_sm.JPG

Click here for bigger pict (http://home.ptd.net/~tommack/Minbike_photos/Rupp-Tom3.JPG)

Title: Re: Small engine repair/maintenance
Post by bill67 on 06/30/10 at 13:20:44

Well thats a thumper too