Comet 30? Help

[swh]

I've got a tractor supply UTV but the setup is similar to what many of the builds here run. 9hp Subaru motor with a Comet Torque Converter. I am having trouble shifting the cart and when idling, the cart pushes forward pretty hard.

I thought it was just the idle set too high but adjusting the idle down just caused the cart to die. So now I believe I may have a clutch issue. The driven clutch is spinning pretty hard in neutral so I assume that is what is making it so hard to shift. The cart shifts just fine when off. It is a spicer rear end with a forward neutral and reverse setting similar to a gas golf cart.

All of my searches on google looking for help landed me here so hoping posting specifics can give me an idea of what needs to be addressed?

Springs on the drive clutch, driven clutch adjustment bad belt or need to crank the idle lower but adjust the carb ratio???

 

[maknwar]

Is the belt real tight?

 

[swh]

It's not real tight but seems like the clutch is engaging at least slightly during idle. Just didn't know if there was an easy way to trouble shoot if I have a motor or spring issue?

---------- Post added at 04:14 PM ---------- Previous post was at 04:14 PM ----------

And it may actually be a 40 series. Don't have it in front of me but the comet 30 appears to be only for 8hp and below.

 

[KartFab]

idle should be set to about 1600-1700 rpms.

Clutch drive unit should be disassembled to make sure it works. One glaring problem i see immediatley is you have a comet 30 series, but you are running it on a 9 hp engine. 30 series are only rated for up to 8 hp. Take that for what its worth.

So assuming you ignore that, you will wear out belts faster and ruin the torque converter over time. what maknwar is asking has to do with your center to center distance -center of engine crankshaft to center of torque converters jackshaf (what the bigger driven unit rides on) measure the center to center distance and write it down, then look at the number on your belt. Then you go look up 'comet 30 series belt chart" to make sure the center to center distance you measured is for the belt you have. The belt should NOT be tight when the engine is off.

other posibilities for the torque converter acting the way it does could be:
the weight springs could be shot, making it engage at lower rpm
drive and driven units not lined up
dirty drive unit does not open up when weight pack disengaged
scuffs/wear on weight pack and or hub prevent smooth engagement/disengagement


anyway, do your homework on this stuff and get back to us. Also, is carb ratio even a thing?

 

[Poboy kartman]

It's controllable by finger pressure on the bottom hole of the device while sucking in.