SOURCE: golf cart smoking
It is most likely related to the rings, but running it would unstick them very fast if they were stuck. It's possible that sitting let rust develop in the cylinder walls and there may be some grooves in them now. They could also just be really worn cylinders. They make some oil conditioners which I wouldn't recommend on a car, but might work fine on a golf cart. I can't recall the name, but it was in a silver can, maybe called engine restore... You could always try that before resorting to a rebuild.
Testimonial: "thanks for your advice. I will try an additive before a rebuild."
SOURCE: I got 1997 yamaha G16
Hi and welcome to FixYa, I am Kelly.
The new carb. fuel mixture adjustment screw should be very close to the setting needed to operate the engine normally. You should not have to move the screw more than 1/8 th turn in either direction from the current ORIGINAL setting.
You mentioned the engine smokes really bad. Several things cause a smoking engine:
1. Older engine
a. Piston oil rings stuck to the piston skirt or rings worn out
b. Piston wear
c. Cylinder wear
d. Valve stem and valve guide wear
e. Valve head and valve seat wear.
f. Crankcase breather clogged
g. Overserviced engine oil.
Perform a compression test on the engine. You should have a minimum of 120 PSI pressure. The higher the pressure the better. If the cylinder compression is under 110 PSI the engine needs some serious maintenance.
I can not emphasize enough that the new carb needing any major adjustments is a symptom of other problems within the engine. Like I mentioned earlier if you have to make a fuel mixture adjust more than 1/8 th turn in any direction from the original setting something else is wrong.
IF by chance someone got over anxious and has moved the fuel mixture screw start at 1.5 turns from just barely closed. I am surprized that the new carb did not come with a plastic cap over the mixture screw.
Thanks for choosing FixYa,
Kelly
SOURCE: what is the spark plug
On the 1993 G8 it's 0.7~0.8mm
On the 2001 G16 it's 0.7~0.8mm
0.028~0.031 inches is the same measurement if you prefer in over mm
Here's the G8 manual: http://www.yamahagolfcar.com/partsandservice/assets/pdf/om_0000000061_QJZ6T.pdf
Here's the G16 manual: http://www.yamahagolfcar.com/partsandservice/assets/pdf/om_0000000095_LIKYT.pdf
Hope that helps!
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