1991 G9A yamaha


New Member
Have a 1991 G9A yamaha cart. Have to pull the choke out to get full speed, please help what is the problem????


Welcome to the forum.

I'd start with taling the carb apart and clean it. Make sure the air filter box is sealed every where. Check gas lines for cracks. Check fuel filter.


Look for a cracked intake manifold. (plastic)

These were common failure (check with starting fluid).

These also had a pilot jet rework (poor off idle acceleration) located on top of the carb.

Let me know what the 3 digit number is and I will be able to tell you

if you have the correct one.

Run an ngk b4es plug instead of the 5. These have the weakest ignition systems

I have ever worked with.

Also if the airbox is not sealed the engine will run lean and you will need to

choke it so it will run.

Check for all 4 rubber straps and make sure there isn`t a hole in the bottom

of the airbox from running over something.