1862 Governor surging

[cubs4lifeofme]

Mowing at Wide open throttle governor is always jumping, Helps if i pull the choke out a little....

 

[gary noblit]

Are you sure the very small spring around throttle shaft is still attached ??

 

[1811Cub]

Sounds like a lean surge, and by using the choke, you are richening up the mixture. Sounds like the carb needs mixture screw adjustment. If that does not help, then a carb overhaul will be needed, along with fuel filter replacement. Might have some junk in it restricting the flow of fuel.

 

[mgonitzke]

Are you sure the very small spring around throttle shaft is still attached ??

Got a pic? I have had and worked on quite a few KT17/M18 engines, and none of them have had a spring wound around the throttle shaft.

 

[cubs4lifeofme]

 

[gary noblit]

Matt, then I'm certainly not thinking of the right engine...sorry for mistake...

 

[tkhoffman]

What 1811CUB said. Jetting might be just a bit gummed up.

 

[gpapa]

May need to rebuild/clean the carb.

 

[cubs4lifeofme]

Cleaned carb to get it running.

 

[1811Cub]

Try slowly backing out the upper mixture screw, which is the high speed. The lower one is the idle mixture. Backing them out will richen the mixture, and help if not correct the massive surging problem.

 

[cubs4lifeofme]

This worked for about 1 min then it quit. Fired back up and runs well for abut 1 lap then dies unless i get the choke on before.

 

[1811Cub]

Definitely fuel supply related. Most likely a dirty carburetor, but fuel pump operation, fuel supply to fuel pump, and new fuel filter must be verified. Also, bad intake or carb to intake gaskets will cause a lean condition.

 

[Ken Black]

dirty carb....
the emulsion tube... probley has some crap stuck in it. some have 4 lil holes in them. some 2. has to come out to clean it.
20 or 30 bucks probley get a new carb. weigh headaches to loss of hair lol

 

[cubs4lifeofme]

Whats the emulsion tube look like ?

 

[Ken Black]

when you take bowl off. that center post rite in the middle of the float. thats where it lives. no idea if yours can come out without ruining it. look into the throat of the carb. its sticking up in the middle. some press in. some screw in. some once in never come out.

find the replacement carb online. confirm price and able to get.. if so ..
then go for repairing the one u have. at least if you mess it up. 1 you learn from mistakes. 2nd you order new one. no big deal win win rite.

 

[Ken Black]

mustie1 and taryl fixes all.. iam sure has a video or 2 on youtubers

 

[eweiss]

You can use a piece of wire clipped off a fine wire brush the rod out the holes, Faster, cheaper

 

[lpalma]

You either really gotta clean that carb in carb soaker, which I have done with these, and it still surged, so I chucked it out and put a carter carb in there.

Ken,
What you are showing is for a carter carb, his is a Walbro, and that part is not removable.

 

[Ken Black]

You either really gotta clean that carb in carb soaker, which I have done with these, and it still surged, so I chucked it out and put a carter carb in there.

Ken,
What you are showing is for a carter carb, his is a Walbro, and that part is not removable.

i understand. but it gives basic ideas of whats wheres and so on ...
not to be rude to OP... sounds like this is a new road for him... so more info can be good can be bad. but gives him idea what is in there.
and one never really knows what comes apart with a big hammer lol hahhaaa ....


biggest take away would be CLEAN CLEAN CLEAN... hahha like a real clean motor to put back togther. ask me how i know that hahahhaha wait dont lol

 

[lpalma]

No problem, I did install the carb into a 1860 after I cleaned it and still surged at WOT. Then I took the one off the 1861 and it put it on the 1860 and it ran fine, the 1861 started surging with the one from the 1860 so I chucked it in the trash...