JCB beaver surging

[Fred Trevvett]

Hello, I've got a JCB beaver with a Honda gx240 which is hunting at idle (governor rod going back and forth like mad) and when you engage the hydraulics it stalls the engine (on demand valve works fine, thats obviously what's killing the engine).

I've rebuilt the carb with new jets, cleaned it from top to bottom about 50 times (well maybe 3 or 4), drained and replaced the fuel, cleaned the spark plug, tried running with air filter off, tried running with fuel cap off, and nothing has helped.

If I grab the governor rod to stop it going back and forth I can make the engine run fine. Any ideas what the issue is?

 

[awemawson]

Air leak at carburettor flange?

 

[8ob]

Idle jet blocked or needs adjusting, its not idling so it starts to die off and then the governor momentarily pulls the throttle wide open. By holding the throttle you are making it run/idle off the main jet.

Bob

 

[eLuSiVeMiTe]

Idle jet blocked or needs adjusting, its not idling so it starts to die off and then the governor momentarily pulls the throttle wide open. By holding the throttle you are making it run/idle off the main jet.

Bob

That would be my bet

Same issue on My Wacker plate.
Pulled it out of storage after 5 years so probably gummed up. On my list for tomorrow

Got it running but won't idle unless on choke

 

[Fred Trevvett]

Thanks, I'll pull it out again this afternoon and see what I can do with the jet. What's the best way of cleaning the it? I've already tried lots of carb cleaner and sewing needles...

 

[Fred Trevvett]

Well I've just been out to the garage and the surging has stopped...whether that will stay that way I don't know

I've taken a video of the stalling under load issue which I'll attempt to upload...

 

[Fred Trevvett]

Actually just remembered you can't upload videos, if anyone wants to see it please PM me an email address or something (I don't have access to YouTube etc)

 

[eLuSiVeMiTe]

Thanks, I'll pull it out again this afternoon and see what I can do with the jet. What's the best way of cleaning the it? I've already tried lots of carb cleaner and sewing needles...

My wife wasn't happy but I've boiled them on the hob before with a little vinegar
She made me do it on the BBQ next time

 

[p0689109]

Who's the boss then!!

 

[eLuSiVeMiTe]

Who's the boss then!!

Happy wife happy life

 

[8ob]

Who's the boss then!!

Depends on who is listening when the question is asked

Bob