Yahama Golf Car - Follow UP

Tom-NoCenTX · May 2, 2014

Thanks to John cub owner, Old Tanker, Pat Williams, Glenster, Some Dayz, Chris(WA), and GordoSD for the original post, about 8 pages over. Its a 1984 Yahama G1-AM4 2 cycle gas golf car. I pulled gas one off at carb, and turned over with starter, and it pumped plenty of gas, so fuel pump seems OK. I checked compression and cold, dry turned with starter it shows 80 lbs, Is that good, fair, or too little?? Today it would not restart down in South 40 - - I could choke it for 30 seconds continuous cranking, pull the spark plug and it was dry. Suggestions please. The plug is new and air filter looks completely clean. Tom

1sarge · May 2, 2014

It sounds like it could be the crank seals. If one of the seals is bad those carts will not run. I have one like it. Try hanging a temp gas tank and gravity feed fuel to it. If you have good spark and it don"t run then, might as well get ready to put crank seals in it.

Tom-NoCenTX · May 2, 2014

1sarge,
It really run good today, as I drove all over the pasture, climbing modest hills, etc, very responsive. Then I killed it at the cattle lots to shut some gates and open some more to get ready to feed my cows. When I tried to restart it, would not start. Before today I had it up on jackstands in the shop for several days, must have started it 20 times over several days and it always started. I also run it up on the stands for 30 minutes. So took it out today and got stranded. Thanks Tom

bo · May 2, 2014

As was said, you have 2 seals ..one each side of the engine. They're not that expensive and not that bad to put in. If those seals fail, it won't suck gas. By the way, 80 compression is border line. but it all depends how you measured it. You really can spin the engine by had and get a good read.
http://www.buggiesgonewild.com/gas-yamaha/7061-yamaha-g1-step-step-instructions-change-crankshaft-seals.html
yamaha seals

bo · May 2, 2014

This is the clutch side...google the fan side.
So here is my quick walk though in putting crank seal in the clutch side of a G1.

Step 1. remove the gas tank
SAM_0203.jpg
Step 2. remove the outter clutch cover via the phillps head screw
SAM_0204.jpg
Step 3. Remove the long bolth holding the outter clutch plate one (7/8" head)Remove the outter clutch plate
SAM_0205.jpg
Step 4. Remove the drive belt and starter belt.

Step 5. Using a clutch puller (can be bought or you can make your own. I bougth mine) remove the inner clutch plate/shaft
SAM_0206.jpg

Step 6. Remove the oil pump gear houseing and pull BOTH the inner and outter housing off of the engine case
SAM_0207.jpg

Step 7. run a screw into the seal and using a claw hammer pry the old seal out.

Step 8. put the new seal in (put some oil on the part of the seal where it slides on the crank shaft to keep it from catching and tearing).

Step 9. Reinstall everything the way it came off.

Hope this helps

oliver fan · May 2, 2014

Replace the coil. It is breaking down when it gets hot.

Pat Williams · May 2, 2014

Got to thinking about this today. Another problem I have had with these is the wiring harness below the fan shroud on the coil side of engine. Its where the engine harness connects to the harness coming from body. Its hard to see may have to jack up cart.cant remember which wire it is. Check them all. Not much goes wrong with these carts. Still leaning toward the seals though.

Pat Williams · May 2, 2014

I agree. 80 lbs is borderline.also is it smoking quoet a bit? The mufflers are known to plug up on these. Google muffler bbq on g1 Yamaha

Yahama Golf Car - Follow UP

Tom-NoCenTX

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