1991 G9A yamaha
- Thread starter hunter
- Start date
HotRodCarts
Cartaholic
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.
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.
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.