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Unread 10-26-2017, 07:31 PM   #321
A Gal with a Cart!
Yamaha
 
Join Date: Aug 2015
Location: Northeast in the Republic of Texas
Posts: 420
Default Re: G2/G9 Twins I've Inherited - Non-running

You are right.
I didn't describe it correctly.

I removed the t-bypass from the fuel line, not the pulse line.
So far, I haven't driven very far or very fast but have not noticed any issues yet.
Although my brother told me it was smoking some when I tried to start it later this evening.

I'm sure I need to adjust the fuel/air mix and I'd like to get the choke reconnected before it gets cold this winter.

I'll see about putting the bypass back in now that I know I have the pump/fuel delivery worked out.
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Unread 10-26-2017, 08:26 PM   #322
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Default Re: G2/G9 Twins I've Inherited - Non-running

If your fuel is not over flowing out of your carb, you will not need a bypass..
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Unread 10-26-2017, 09:04 PM   #323
A Gal with a Cart!
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Location: Northeast in the Republic of Texas
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Default Re: G2/G9 Twins I've Inherited - Non-running

Good point.
I'll watch the carb and I think I have the fuel mixture a little rich.

Just feels good to have this a bit further along.
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Unread 10-27-2017, 07:49 AM   #324
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Default Re: G2/G9 Twins I've Inherited - Non-running

If you need the return line it will be real obvious. Like gas pouring out of the carb.
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Unread 04-27-2018, 02:37 PM   #325
A Gal with a Cart!
Yamaha
 
Join Date: Aug 2015
Location: Northeast in the Republic of Texas
Posts: 420
Default Re: G2/G9 Twins I've Inherited - Non-running

Here we are several months later and this is the continuing saga.

In November the cart was spewing black gunk everywhere, wouldn't stay running and seemed like it was running hot. I was experiencing the funk of my first Christmas with both Mom and Dad being dead so I just put this aside. Spent most of this spring attending to estate issues. Most estate issues are now complete.

I called Tony (IronMonkey) and he suggested I go through the fuel system.

Smart guy.
Tony's first rule of carts is 'Did you make sure the carb fuel switch is in the ON position'.
His second recommendation was to drain the tank and check the filter.

I hate the filter being in the tank just for that reason. Seems there is no easy way to remove the fuel without getting it all over.

I drained the tank and pulled it.
I touched the filter and the little metal cap came off. I started to gently push it back on and the filter unfolded and came apart.

Probably explains the particulates floating in the last of the gas that came out of the tank.

I cleaned off the cap and replaced the fuel line on the outside so I could have a long enough line to add an 'in-line' filter.

I had purchased a new oem fuel pump and installed that. It is what was supposed to be on the cart but it is not as wide as the old pump. The fuel filter never completely fills with fuel. There is always air in the filter.

I decided to run the filter down low and it lays horizontal on the frame.
This is a filter that was going to be used in the 63 Willys pickup so I'm wondering if it is too large. I'd have to measure it but I think its about 3 inches long and about 2 inches inches across.

With IronMonkey answering the phone several times, we were able to get it dialed in and running. I drove it 1/4 mile to the mailbox and 1/4 mile back from the mailbox-- up and down a hill.

Going to the mailbox -- everything was fine.
Coming back from the mailbox it slowed down greatly coming up the hill which makes me wonder if the gas filter is too large or the new pump to small.

I don't have the bypass T in it since it is starving for fuel, not overwhelming the carb with fuel.

I get within 30 feet of my shade tree I work under and it stops moving.
Won't go forward or reverse.

I sit for a few minutes, try again. Engine kicks on and it still won't move.

I pushed it back to the tree and came in to get some advice.
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Unread 04-27-2018, 03:25 PM   #326
A Gal with a Cart!
Yamaha
 
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Default Re: G2/G9 Twins I've Inherited - Non-running

After about an hour, IronMonkey called back and I went outside to try again.

Cart starts and moves, forward and reverse.

But run it long enough and it stops moving although the engine is still running.

Is the big belt too loose? He suggested I try moving the motor and removing some of the slack in the belt.

After dinner... I'll give it a whirl.
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Unread 04-27-2018, 05:56 PM   #327
A Gal with a Cart!
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Default Re: G2/G9 Twins I've Inherited - Non-running

Went downstairs after dinner and got on the cart.
Drove it to the tractor and back.
Sigh.

It was louder than normal.
The nuts were backing off the exhaust pipe. I tightened them again. One of the nuts was missing.

Can I use loctite on those? Or maybe I should use two nuts on each stud.

I repositioned the fuel filter so it was at a downward angle rather than laying horizontal. My thought there is the gas would gravity drain into the filter helping keep it filled when stopped.

I tested the gas line to the carb. Pulled it off the carb and with the cart in neutral, pushed on the pedal--- gas was coming out.

I reconnected and repositioned that gas line... using the line clip on the motor, I laid the line in the clip. The excess line I made sure was lower than that clip. It had been riding about 2 inches higher than the top of the motor.

Basically, I tried adjusting the fuel system so that the lines ran as low as possible and the fuel filter was using gravity to help it maintain a good level. There is definitely a smaller air bubble in the fuel filter.

I'll try shifting the engine forward tomorrow morning, trying to tighten the big belt a little more.
Most everything in the engine area is now a wee bit too hot to muck around with this evening.

Pulled the plug and checked compression -- about 105. Seems like enough to get a good vacuum in the pump.

Lol. Progress was made today!
Whats that line? - Don't know where I'm going, but I'll know when I get there.
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Unread 04-27-2018, 06:58 PM   #328
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Default Re: G2/G9 Twins I've Inherited - Non-running

A lean carburetor mixture (too much air and not enough fuel) can cause an engine to overheat even with plenty of cooling air. Backfiring under load will be a symptom in this case, caused by a plugged fuel filter of pickup screen in the fuel tank, might need to turn that screw a wee bit more out... I know you just changed the oil, too much will cause it to smoke and run hot..
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Unread 04-27-2018, 08:20 PM   #329
A Gal with a Cart!
Yamaha
 
Join Date: Aug 2015
Location: Northeast in the Republic of Texas
Posts: 420
Default Re: G2/G9 Twins I've Inherited - Non-running

Thanks for the tips ... I'll see about it in the morning.
I just feel like this is nearly there..... with your help!
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Unread 05-23-2018, 02:00 PM   #330
A Gal with a Cart!
Yamaha
 
Join Date: Aug 2015
Location: Northeast in the Republic of Texas
Posts: 420
Default Re: G2/G9 Twins I've Inherited - Non-running

SUCCESS, dare I saw VICTORY?

After taking a detour to get the Massey Ferguson 165 tractor running (after 5 years of non-use), I had to rebuild the carb and reinstall it correctly before it ran.

That made me have a much better understand of this golf cart fuel/air issue.

I removed all the efforts I went to for the airbox.
Released the motor mounts and moved the entire engine over about 3/4 inch.
Tightened the engine back down.

Removed the right rear shock (put the jack under the bumper and jack it up to release the tension on the shock... sitting on the bumper does you absolutely no good... Leave the shock alone and move the frame until you can easily get the bolt out.)

Went back to the 'pile-o-parts' and pulled the vegas carts low-profile airbox back out and shazaam, it now has enough room to go in-- just barely.

Tightened it down, tightened the engine plate down, and put the shock back in, then tightened the bolt for the shock.

Made sure the gas screw was 1 1/2 turns out instead of 2 1/2 turns.
Adjusted a squeegy bit more than the 1 1/2 turn and it runs just fine.

IT RUNS JUST FINE!

Does not stall on the hills. Doesn't spew black gunk. Doesn't need to be primed. Doesn't overflow the carb. Doesn't seem too loud. Doesn't shake you to death.
RPMs go up when you push on the gas pedal.
RPMs go down when you release the gas pedal.

Finally.

The problem (other than myself)
1. Improper setting of the carb gas screw
2. Air leaks around my pitiful airbox solution.
3. Fuel filter inside the cap of the gas tank had failed and there was mondo particulates in the gas.
4. New external tank fuel filter was re-oriented to be nearly level as low on the chassis as I could get it.
5. Fuel line was shortened so it didn't have a 'high' curve putting it several inches higher than the engine.
6. Moved the engine further to the center of the cart by just 3/4 of an inch. Made all the difference in space so the airbox would fit better.
7. Tighted the starter belt more after moving the engine plate. I noticed there was wear on one side of the belt. No doubt I had it too far out of alignment prior to this. I guess I need a different combination of eyes and glasses. lol

8. Biggest change was in my attitude. I expected this to be fixed. I realized the fuel is just part of the carb success. The air is equally important.

Thanks to everyone that helped.

I'm now going to order the parts needed for the 2nd cart (already have the new engine.).

The last cart is going to be put back with a stock engine. I figure I have 2 1/2 stock engines, I should be able to get something running out of that pile-o-parts.

JW
(P.S. Ironmonkey17 -- thanks for helping and answering my phone calls. You are a treasure to the forum!)
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