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Gas Yamaha Gas Yamaha Golf Cars; G1 through "The Drive" and U-Max Utility Vehicles |
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06-16-2022, 03:33 PM | #1 |
Not Yet Wild
Join Date: Jun 2022
Posts: 7
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G3 w/215 is surging on flat ground, steady speed uphill
G3 w/215 is surging on flat ground, steady speed uphill, float height I assume? Dies, I let off throttle, throttle, fires back up, rinse/repeat. Also, when I throttle hard around a turn it goes well until it straightens out so definitely acts like a float height issue.
I plan to take apart and clean as I am sure it's filthy from sitting after being put away wet. |
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06-16-2022, 08:48 PM | #2 |
Searching for The Way
Join Date: Oct 2009
Location: Medina, Ohio (NEOHIO)
Posts: 11,421
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Re: G3 w/215 is surging on flat ground, steady speed uphill
That's the first place I'd look. I would take carb off, clean the outside really good, take bowl off, clean, set the float per factory specs in manual. Also, while the carb is open, I would remove the jets and clean them as well. I use small copper wires for the tiny jets.
One other thing on these is the fuel pickup tube in the fuel tank. They have a tendency to crack and leak fuel pressure. You can pull that out and inspect it. On past carts I have replaced it with 3/8 fuel hose, I usually make it long enough to lay on the bottom of the fuel tank. |
06-16-2022, 09:50 PM | #3 | |
Not Yet Wild
Join Date: Jun 2022
Posts: 7
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Re: G3 w/215 is surging on flat ground, steady speed uphill
Quote:
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06-17-2022, 07:30 PM | #4 |
Searching for The Way
Join Date: Oct 2009
Location: Medina, Ohio (NEOHIO)
Posts: 11,421
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Re: G3 w/215 is surging on flat ground, steady speed uphill
I should clarify:
If your suction tube in the tank is cracked or broken, it won't leak fuel pressure, it will leak suction and fuel won't pull throught the system by the pump. Same scenario if you dry to drink from a cracked/bent soda straw. |
06-18-2022, 12:09 PM | #5 | |
Not Yet Wild
Join Date: Jun 2022
Posts: 7
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Re: G3 w/215 is surging on flat ground, steady speed uphill
Quote:
Gave a ride to some friends, back seat/rear end was loaded down, actually ran better as far as constant speed and continuing to run. So float height is definitely suspect. |
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06-18-2022, 04:25 PM | #6 |
Not Yet Wild
Join Date: Jun 2022
Posts: 7
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Re: G3 w/215 is surging on flat ground, steady speed uphill
Cleaned the carb well. At first ran like a scalded cat but wanted the choke, once it warmed up a little, same surging although not as bad. I tried again with choke to see if it ran better, was hit or miss.
May as well replace the seals since their condition/replacement is unknown. |
06-27-2022, 01:22 PM | #7 |
Not Yet Wild
Join Date: Jun 2022
Posts: 7
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Re: G3 w/215 is surging on flat ground, steady speed uphill
I've cleaned the OEM Mikuni carb, soaked disassembled for an hour, blew out every orifice with compressed air. Did not touch the float (ran decent before any of this, just bogged down at higher speeds), wanted to run on choke.
Baked/cleaned muffler, clear, still wanted choke. Replaced seals, still wants choke. What am I missing? Intake boot looks intact. Update: carb joint boot has crack/leak behind clamp. Ordered a new one and a reed cage gasket. |
06-28-2022, 01:10 PM | #8 |
Gone Wild
Join Date: Jan 2017
Location: venice
Posts: 1,805
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Re: G3 w/215 is surging on flat ground, steady speed uphill
what is the mixture screw set at?
have you checked the throttle shaft for wear? |
06-29-2022, 12:26 PM | #9 | |
Not Yet Wild
Join Date: Jun 2022
Posts: 7
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Re: G3 w/215 is surging on flat ground, steady speed uphill
Quote:
No play on shaft atop carb. Ran decent/better before I performed all the maintenance chasing top end cut out issue. My assumption is with all the caked on grim, and the boot not being touched until I removed the carb for a through cleaning, I exacerbated the tear on the boot. Regardless, all belts etc were OEM and appeared original as Mitsuboshi, so was past time for maintenance of belts, seals etc. The engine is all original with all OEM components, once cleaned, looks brand new and very surprised it's made it this many years without someone bodging the components "fixing" or "improving" them along the way. |
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06-30-2022, 06:01 PM | #10 |
Not Yet Wild
Join Date: Jun 2022
Posts: 7
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Re: G3 w/215 is surging on flat ground, steady speed uphill
Checked carb again, fully functional, checked pump, clean as a whistle pumping as it should. Still wants choke to run it's best, backfiring on deceleration.
120 PSI compression, I have cleaned everything I can think of. |
Tags |
215, two stroke, yamaha g3 |
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