Erratic revving on barn find 1962 cc

[cubby102]

Sounds to me like its running a bit on the lean side. Try turning the screw facing straight up off the top of the carb out maybe a quarter turn or so. It should make the surging a little better. Once you learn to "read " the spark plug and read good in the carb are of the manual you will be able to get it tuned in. Good luck and remember that manual can be your best friend

[finz68]

Thanks for the suggestion! You folks have been so helpful- I think that I became so obsessed with getting this dormant machine running on it's own power that I forgot the basics- research all that is available, create an educated game plan and THEN ask for the appropriate help when you hit a wall!

[Sam Mac]

Originally Posted by finz68

Thanks for the suggestion! You folks have been so helpful- I think that I became so obsessed with getting this dormant machine running on it's own power that I forgot the basics- research all that is available, create an educated game plan and THEN ask for the appropriate help when you hit a wall!

OK now we are getting somewhere. These things are pretty basic but carb and ignition can give you fits. The manual will help you understand how they function. If it has been sitting for a long time you almost certainly will need to rebuild the carb, then you can get it adjusted properly. If you post engine questions in the engine section you will find that we have some very talented guys that know these old engines inside out and should be able to get you running as good as new in short order.

Sorry if I jumped on your case yesterday. Good luck with your Cub.

[finz68]

Thanks bro- when you wrote, "do you want us to fix your tractor and drop $20 on the counter?", I was like, "whoa, I guess I pissed the moderator off pretty quickly, huh?" Delivery: 0, Point made: 1

[Sam Mac]

Originally Posted by finz68

Thanks bro- when you wrote, "do you want us to fix your tractor and drop $20 on the counter?", I was like, "whoa, I guess I pissed the moderator off pretty quickly, huh?" Delivery: 0, Point made: 1

Nope I didn’t get PO’d just that you had the same question posted in 2 threads. I don’t get PO’d that easy. But I have been known to bust on occasion.

[Leadslingingdaddy]

All comes down to the old saying

Take me fishing and feed me for the day or teach me to fish and feed me forever.

[cub123]

I know you said you cleaned the carb, so that's a plus. Did you clean out the rest of the fuel system too? Tank, filter/bowl, and gas line? I know for a fact it can clog a clean carb in a hurry if you didn't

[finz68]

the entire fuel system: gas tank, lines and carb are rebuilt and cleaned. The governor control rod and attached throttle level freely surge when idling. I am combing through the manual right now.

[J-Mech]

Bad fuel, misadjusted carb, any problems in the fuel system can cause this. Something else to look at it how much "play" is in the linkage from the governor control lever to the carb. Any play in that rod that attaches the two, (I.E. the hole in the carb or governor is wore too big.) Any looseness in this linkage will cause it to surge.

[nikster]

Originally Posted by finz68

any help will be greatly appreciated! when i open full throttle via the dash lever, the magneto lever on the engine that is attached to the butterfly on the carb by a thin rod keeps opening and closing revving erratically while the engine is running. I can only get full throttle if i manually hold the magneto lever and butterfly open. Any suggestions? I have tried playing with the 2 screws on the carb with no luck.

Here's what I found out on my #127-12hp.;

I rebuilt the carb, new points, new spark plug, new head gasket, adjusted to specs (from the engine manual). & had that erratics reving from that governer rod at high idle. Broke the manual out on kohler engines, followed it to a T, & adjusted the arm to specs. Not good enough.

I had to tinker around a bit but got it running right & now it purrs.

I by no means am a mechanic, but by following the manual did help & helped me understand the mechanics of the engine a little more.

NIK,

Oh, new gas filter, line, oil change,

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