lifted club cars - lifted ezgo
Home FAQDonate Who's Online
Go Back   Buggies Gone Wild Golf Cart Forum > Golf Cart Repair and Troubleshooting > Gas Yamaha
Gas Yamaha Gas Yamaha Golf Cars; G1 through "The Drive" and U-Max Utility Vehicles



Post New Thread  Reply
 
Thread Tools Display Modes
Old 08-23-2010, 08:26 AM   #1
jiminpa
Gone Wild
 
jiminpa's Avatar
Club Car
 
Join Date: Jun 2010
Location: Snowy NW PA
Posts: 273
Question '93 G9 Gas - barely runs after after electrical issue

Ok Yamaha guys, need a little direction here for the Club Car guy...
Back story: Friend owns a golf course, Jim-in-PA helps out now and then with fixing stuff. Yesterday while visiting I get "Hey can you take a look at that cart, it won't do anything, I think the battery is dead or something." Well, turns out that the connection on the battery was bad & after that, found the ground connection on the starter/generator to be bad. It had burned the stud almost through and when I went to take it off, it almost fell off in my hand. I took a starter off a parts cart of older vintage, looked right except 2 wire plugin for regulator had wrong socket, but, right wire colors, so, I took a chance and spliced it in.
Well, I thought I had it because it started to spin right over when I touched the gas pedal. Put it all together and jumped on for a test ride. It started, but the best I could get was a fast uneasy idle, not even fast enough to engage the clutch and get the cart moving at a crawl. Ideas? I will add, I removed the fuel tank for access to the starter when I was trying to see if I could salvage the original starter. also, unpluged a control unit of some sort (ignitor?) below the front corner of the fuel tank. (reconnect both when finished) After I did all this the grounds keeper told me the guy who had it out said he was coming down the fairway and it backfired and quit and wouldn't start. I am thinking that the 2 issues I fixed were not the cause, but only compounded the problem.

I am at somewhat of a disadvantage as I am about 40 minutes away from the cart with no internet access at the cart location.

It almost seemed like fuel but gave it a shot of starting fluid in the carb while it was barely running and it made no difference (slightly worse). These Yamahas have no timing adjustment right? Almost seems like late timing, like a timing belt jumped a tooth or something. But these have nothing that can fail in that fashion right? Does it have a keyway that tends to fail or shear keys?

One more thing I should mention, when I first touched the gas pedal to see if I had resolved the starting issue, it took right off, enough so that the cart started to move. It has not run that well since I first hit the pedal.

Do these have a pickup on the flywheel and is the pickup on the inside or outside of the flywheel?

Ideas???

Thanks.
jiminpa is offline   Reply With Quote
Alt Today
BGW

Golf car forum Sponsored Links

__________________
This advertising will not be shown in this way to registered members.
Register your free account today and become a member on Buggies Gone Wild Golf Cart Forum
   
Old 08-23-2010, 08:39 PM   #2
sho305
Vegas modded 420
 
sho305's Avatar
Yamaha
 
Join Date: Jun 2009
Location: West MI
Posts: 15,344
Default Re: '93 G9 Gas - barely runs after after electrical issue

I would swap the plug first. Check the fuses and rest of the wiring, especially any ground wiring everything is grounded the frame is not ground on these. I suppose the ignition grounds are most important here. I would swap the ignitor from another cart if you think its that, they are pricey and don't go out that often. Wiring connections are the most problems on these, airbox not on tightly will make them run poor but usually not affect the idle. Make sure the generator is not spinning it backwards, it spins counter clockwise from clutch side.
sho305 is offline   Reply With Quote
Old 08-23-2010, 10:51 PM   #3
jiminpa
Gone Wild
 
jiminpa's Avatar
Club Car
 
Join Date: Jun 2010
Location: Snowy NW PA
Posts: 273
Default Re: '93 G9 Gas - barely runs after after electrical issue

sho305,
did they switch rotation on these like club car did? the starter I pulled came off a Yamaha, so unless A1/A2 got switched on the old one, it should be OK on rotation. It will run at idle, just nothing above idle, won't speed up enough to engage the clutch.

On the air box issue, is it a seal issue around the top?
Where is the ignitor located on these? Do the pickups on the flywheel go bad? Does it have pickups on the flywheel?
I can bring a spool of wire along with me next time and I can run some ground jumpers to test every **** electrical item for bad ground. It's beginning to annoy me since I opened my big mouth when I found the first bad connection at the battery and said something like "Oh, we should have this back up and running in no time."

Headed back to take a 2nd look Tuesday so if you have any other ideas on things I should check let me know, before about 9:00 AM.

I will post results...
jiminpa is offline   Reply With Quote
Old 08-23-2010, 11:32 PM   #4
Mike Mac
G8 Specialist
Yamaha
 
Join Date: Jun 2009
Location: Phoenix
Posts: 7,799
Default Re: '93 G9 Gas - barely runs after after electrical issue

Check throttle cable is opining the carb. Do you know for certain that it is getting spark?
Al chassie grounds need to be rerouted to ground lug of starter, or to - battery cable.
Mike Mac is offline   Reply With Quote
Old 08-23-2010, 11:46 PM   #5
sho305
Vegas modded 420
 
sho305's Avatar
Yamaha
 
Join Date: Jun 2009
Location: West MI
Posts: 15,344
Default Re: '93 G9 Gas - barely runs after after electrical issue

The older 2 stroke G1 ran in both directions, if a 4 stroke I think but not positive they are the same. Is it running or just the generator spinning the engine? If wired wrong it will spin the wrong way, but of course it would not run at all.

The ignitor on a G9 is on the lower front of the gas tank with the larger plug into the bottom of it, black plastic box. The pickup is under the flywheel. IIRC the wiring for a G9 is posted here on the forum. In short the 12v goes to the key and pedal switch, then to both ignitor and the generator to start it. The small wires on the generator are for charging and go to voltage reg on left fender well next to fuses.

Spark and gas, it should run. These carts have relatively few problems excepting wiring issues. The seal on top of airbox yes, but it should still start and idle. If that is off it can foul the plug and the plug will still look good. Do you have a spark tester? Anything is possible but not heard of flywheel key issues. Have heard of bad wires on the pickup where it comes out of block, ignitors go bad once in a great while, as might a coil or pickup, in general they don't.

If you think it could be gas all you have to do is pull the line on the pump to carb, it should shoot out cranking. Clean the carb just spray the passages with carb clean. Idle mix 1.5 (stock) to 2 turns out. Set idle speed so it barely idles above starter speed. If needed pull the floor panel at pedals and set throttle cable so it idles without moving throttle at carb, though that is usually only a problem from private owners.

Backfire could be fouled plug from air or fuel issue, wiring issue, or maybe something else. Grounds you should be able to follow from the battery, just check connections or test. Mine has a couple of small wires have new connectors near the starter solenoid, I forget what they are for. Check the ground wire on the coil. I'd grab a spark tester, though a bad plug can show good. Another trick is to pull the plug boot part way off so it jumps inside there a little, and it will make the spark stronger to a bad plug and sometimes make it run if thats the issue. If it was out and you just put a little gas in it, it takes a while to pump the fuel up. If you fill it up it will start pretty fast from dry tank.
sho305 is offline   Reply With Quote
Old 08-24-2010, 07:22 AM   #6
jiminpa
Gone Wild
 
jiminpa's Avatar
Club Car
 
Join Date: Jun 2010
Location: Snowy NW PA
Posts: 273
Default Re: '93 G9 Gas - barely runs after after electrical issue

It is actually running, just can't get it much off idle speed, once in a while it will get up high enough to start the clutch to close up, moves the cart an inch or two, then I have to back out of the throttle or it will stall. I never heard it backfire, that is what the grounds keeper said. I did manage to come up with a PDF of a service manual for this cart last night late, I see it has test procedures and resistance reading for various ignition components. I did not really look at it close, but, at quick glance, I think it will give me enough info to figure out what is wrong without just replacing a bunch of parts and hoping I get the right one. I swapped out the plug with a new one that was on the shelf in the garage, but, different brand and I am not sure it is the exact right plug. Looks the same, but didn't have info on which plug should be in it and what the gap should be set to. I now have that info in the Service Manual PDF.

Thanks, for the info.
I am on my way to the cart in about 40 min.
Will post back results.
jiminpa is offline   Reply With Quote
Old 08-24-2010, 10:04 PM   #7
jiminpa
Gone Wild
 
jiminpa's Avatar
Club Car
 
Join Date: Jun 2010
Location: Snowy NW PA
Posts: 273
Default Re: '93 G9 Gas - barely runs after after electrical issue

Update: did not get to work on the cart today. Walked in to find the greens mower badly screwed up. Someone intentionally messed up the adjustments on the reels so they did not cut even or at all in one case. Spent most of the day fixing and doing a setup on the cutting heads. also issues with fairway mower. may try again Friday.
jiminpa is offline   Reply With Quote
Old 08-25-2010, 06:19 PM   #8
sho305
Vegas modded 420
 
sho305's Avatar
Yamaha
 
Join Date: Jun 2009
Location: West MI
Posts: 15,344
Default Re: '93 G9 Gas - barely runs after after electrical issue

Oh yes, I used to grind those reels in the winter, lap them in every two weeks or whatever it was in summer. They are not for people to mess with, very expensive and if you change the height the golfers all have "screaming monkey" attacks. You don't set them right and take the edge off, you have to lap the snot out of them or they don't work right. We had the grinders there so I could do one if I had to, if a bearing went out or something in the summer and goofed one up.
sho305 is offline   Reply With Quote
Old 09-04-2010, 03:13 PM   #9
jiminpa
Gone Wild
 
jiminpa's Avatar
Club Car
 
Join Date: Jun 2010
Location: Snowy NW PA
Posts: 273
Unhappy Re: '93 G9 Gas - barely runs after after electrical issue

Ok, finally got back and had a chance to fool with the cart again. (by the way, I guess I did a good job on the greens mower, the grounds keeper was happy and the golfers were happy too. Not bad for a guy that had never really touched a reel mower before to have to setup a 6 foot multiple head reel and have it work right) But, back to the Yamaha cart...
Ok, followed to diagnostic in the Yamaha shop manual, checked the resistance on the coil, wires and the pickup, all in speck. checked the resistance between the motor and the ground on the batt., no problem. Checked the rest of the connections I could easily see, all look fine. Checked the compression, looks fine. changed the plug. Cleaned the carb., looked good to begin with. made sure no water in fuel. Still no better. swaped out coil & igniter from another good cart. even though it was within speck on resistance, still no better. Had to leave at that point. Next time I visit, I may swap the pickup with one from a running cart even though it's resistance was within speck. But, that is a bit more monkeying around then I like for just a shot in the dark. Any other thoughts on this mystery? It is beginning to annoy me...
jiminpa is offline   Reply With Quote
Reply
Go Back   Buggies Gone Wild Golf Cart Forum > Golf Cart Repair and Troubleshooting > Gas Yamaha


Thread Tools
Display Modes


Similar Threads
Thread Forum
Ez Go PDS electrical issue ? Electric EZGO
89 parcar rebuild, barely runs..wrong piston? Gas Columbia ParCar
82 ParCar will not run, electrical issue Gas Columbia ParCar
87 ez-go 36volt electrical issue (Help) Electric EZGO


All times are GMT -5. The time now is 10:36 PM.


Club Car Electric | EZGO Electric | Lifted Golf Carts | Gas EZGO | Used Golf Carts and Parts

Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2022, vBulletin Solutions, Inc.
This Website and forum is the property of Buggiesgonewild.com. No material may be taken or duplicated in part or full without prior written consent of the owners of buggiesgonewild.com. 2006-2017 Buggiesgonewild.com. All rights reserved.