Chipper engine issues

[njc110381]

Hey guys. I've got a little Entec 18/100 gravity feed chipper and the engine is having trouble when put under load. It runs fine at tick over, but when I try to rev the engine up it starts missing badly. It can just about pick itself up and then holds smoothly at full revs and can cope with branches up to about 2" (so stuff that the flywheel momentum can handle without loading the engine). As soon as anything bigger is put in, it starts coughing again until the chip has cleared and it's free from load again.

 

I've stripped the carb and it's clean. Plug connections are tight and I can't see any holes in the fuel hose etc. I'm not big into engines so I've now hit my limit. Any idea what it could be before I take it in to be repaired?

 

I'd be really grateful for any ideas.

[Rich2484]

Change the plugs, check the oil, and clean the air filter out.

[Graham]

Could it be something interfering with the govenor?

[Breezeblock]

is it 1 or 2 cyl take the plugs out and make sure your getting a good spark go for basics first