governor searching

[Anonymous-0]

Okay, I'm stumped! I am having a problem with my governor on my M searching, instead of running solid and constant. I got a very clean looking used original replacement, and installed it yesterday. When I start it up, it still does the searching. All the past posts I've read state a problem at the governor. Could it be spacers/bushings, or something else internal?

 

[d. coleman]

have you tried adjusting linkage or installing new/different springs? the stop on fan support bracket might need tighting to take up slack. good luck, d. coleman (48M&51B)

 

[JDD]

Does it search only at idle or at any engine speed?

 

[alabamafrog]

My buddies M was searching/surging and I moved the idle screw in a little and it stopped. Have you tried messing with the idle and load screws?

 

[Anonymous-0]

It searches at any engine speed.

 

[Anonymous-0]

I'm not sure if that is going to make a difference, if the engine searches at any engine speed. That part I tested and am certain about.

 

[Anonymous-0]

Our M's throttle was hunting all over the place and backfiring. Looked at everything. Turned out to be on bad spark plug. Put in a different set and it ran perfectly.

 

[d. coleman]

the governor works on the prencipal of centrifical force(engine RPM)trying to extend flyweights which close the throttle and are working against the spring tention setting(throttle handle setting)which trys to open throttle. slack or misadjustment of linkage will cause the "balance" to be off between flyweight movement and spring tention. this will cause the engine to surge and hunt as engine governor arm moves through the space of no resistance and finally reach spring tention and cycle will start all over. id check to make sure engine governor bushing (in engine block) isnt worn and all slack or free movement is removed from governoe arms. good luck, d. coleman

 

[d. coleman]

the governor works on the prencipal of centrifical force(engine RPM)trying to extend flyweights which close the throttle and are working against the spring tention setting(throttle handle setting)which trys to open throttle. slack or misadjustment of linkage will cause the "balance" to be off between flyweight movement and spring tention. this will cause the engine to surge and hunt as engine governor arm moves through the space of no resistance and finally reach spring tention and cycle will start all over. id check to make sure engine governor bushing (in engine block) isnt worn and all slack or free movement is removed from governoe arms. good luck, d. coleman

 

[Bob]

A carb that's not quite right... plugged passage, etc., will cause "hunting".

 

[toot]

If it "hunts" at any speed, have you tried giving it a slight choke while running to see if that helps a little? 9 out of 10 tractors that surge is because of dirty carb passages

 

[M-MAN]

The governor is rarely the problem when an M is hunting. A fresh tune up is a good place to start & this includes setting the timing and verifying fuel flow afterwards. This narrows down the possibility's.

Did you adjust both linkage rod's? (This is the usual culprit) (Gov rod is 2 rounds long & gov to carb is 2 rounds short.) Cotter pin on carb installed so it can't hit throughout it's travel? Carb in good shape? Dist springs and weight's good and free as well as no play in shaft?

 

[Kurt_JDB]

I had a similar problem on my "51 B. Turned out that one of the rod ends was binding. So the governor kept overcompensating.

Kurt

 

[Anonymous-0]

I'll have to look into that possibility. FYI - When I got it home, in pieces I might add, and got it all back together, I had a "John Deere Man" come and help me with the timing. We finally got it running, after about a half hour. Timing good, sparkies good, wiring good.

 

[Anonymous-0]

The bushing is new. I'll check the arms to see about 'slack' in their movement. Maybe a bent spring, but I don't remember seeing it bent when I was putting it back together. Most likely a bit loose. I'll check tonight, after work.

 

[Anonymous-0]

Soaked, cleaned, and thoroughly rebuilt prior to getting it to start.

 

[Anonymous-0]

I've read on this forum, that the governor is the usual culprit when the engine is 'searching', since it has the moving parts that get worn down/out. I'm going to check the spring and tension of the arms/rods, after work tonight. I'll post again and let everyone know.

 

[Anonymous-0]

Good to know. I'll check that, too.

 

[Drummer]

My 630 was hunting and I thought sure it was the governor. I bought a used governor for it but before I put it on the tractor started running only on one cylinder. I swapped a carb off my other 630 and solved both problems. The post that said plugged passage ways was right on for me. Drummer

 

[d. coleman]

soaking carb in cleaner won't remove rust from cast iron body passages. proper size drill bit turned by hand is proper way to clear passages of rust and debre. check Roberts Carborator web sight for referances to proper size for "M" carb. god luck, d. coleman

 

[d. coleman]

just a thought, did the wear washer get installed between the engine bushing and governor gear? also sorry for leaving a "o" out of "good" in my last post. d. coleman

 

[Anonymous-0]

No prob.
Bushing installed, not dropped inside.
I took a brush to the carb parts, after a good soak, but never CLEANED the pipe. Maybe there is some gunk built up causing my problem. I am going to break the carb down again, tonight. It's the TSX 245. At least that much is for sure. It says so on the little brass tag. Sidebar - The numbers 10 48 are also on the tag under the model number. Are they the month and year of assembly?