GEBE 35cc Throttle Problem! Please help!

[bumwaiter]

I have a Robin/Subaru 35cc engine from Golden Eagle. I love it dearly, however, when I start the engine, instead of idling, the engine revs almost as if I had the throttle fully engaged. It engages the belt drive right after I start it with the pull cord.

The cord isn't tangled, I wonder if I banged something loose. Anyone else have this problem?

Please help, any suggestion or wisdom would be much appreciated.

 

[augidog]

...does it settle down after it starts or stay at a high idle? have you physically adjusted the idle down?

 

[bumwaiter]

adjustments

it goes to high directly after i start it, maybe a 1 second delay from when I pull the pull cord. It stays on high and sounds like its really straining, so I turn it off.

The GEBE website says not to touch the idle screw. It says to adjust the barrel nut and the lock nut that run close to the carberator.

I really don't know too much about engine maintenance, this is why this problem is such a challeng.e

 

[augidog]

so...let's start checking things, including the idle if we have to. something's wrong & we can't limit our troubleshooting options. if it idled fine before & now it doesn't, i have some ideas. look at the throttle-plate on the carby, is it fully-returned and resting on the idle screw? is the cable-end maybe stuck on the end of the barrel-adjuster instead of seated inside? turn the bars back and forth and see if the throttle-cable is traveling or tugging on the throttle.

for a "workstand" i put the bike on it's kickstand, stand on the left-side, lean the bike into me until it's on the front wheel and the kickstand, rear-wheel off the ground. lefthand on throttle, righthand to start & make adjustments. it's a good idea to have a functioning killswitch when doing this stuff.

 

[bumwaiter]

http://www.bikeengines.com/throttle.htm

i've been tweaking with this, let me know what you think.

 

[augidog]

that's the reference page we're using

and i'm trying to help you figure it out...see my post above...and let me know the answers so we can move forward.

 

[bumwaiter]

the housing on the cable slips out of the barrel nut, and when i put it back in place it gives more slack to the throttle cable.

i believe the throttle plate is where it is supposed to be. the throttle wasnt returning to its normal position fully, but i have adjusted it back to where it was.

 

[augidog]

ok...let's use the barrel to get the slack out of the cable-housing, but NOT to apply any pull on the throttle plate. when you have that adjustment finished, let's look at the position of everything again.

 

[augidog]

i'm headin' for ride & bbq...i'll check in when i get home.

 

[bumwaiter]

adjusted the idle screw and everything works fine.

however I believe both the throttle cable and idle screw are still not perfect.

how do I adjust both so they are perfect?