A Yamaha G29 Drive that cranked fine last fall and now only coughs is a common spring story. Ethanol fuel sits in the carb, the pulse line gums up, and the cart gets parked again. Before you throw a whole engine at it, walk a short checklist.
This is for carbureted G29 / Drive gas carts (roughly 2007–2016). Drive2 Quietech EFI is a different animal—do not follow carb steps on EFI.
Safety first
Work outside or with real ventilation. Hot exhaust and raw fuel are a bad mix. Kill the key, chock a wheel, and keep a fire extinguisher nearby if you are spraying cleaner. If you are not comfortable around gasoline systems, stop and take it to a cart shop.
Step 1: Prove spark
Pull the plug, ground it against the head, and crank. You want a sharp snap, not a weak orange glow. A fouled or worn plug is still one of the cheapest misses on these engines. We keep a common Yamaha plug here: Yamaha NGK spark plug (1990-up). Gap it to the spec in your manual and try again before you dig deeper.
No spark at all points at kill wiring, coil, or the starter/generator side—not the carb. Fix spark before you buy fuel parts.
Step 2: Separate “no fuel” from “no spark”
With the airbox boot off, a one-second shot of carb cleaner into the intake that makes the engine fire once is a fuel-delivery clue. If it still will not pop with a little cleaner, stay on spark and compression. If it fires on cleaner and dies, you are in fuel territory: tank pickup, pulse line, pump, filter, or carb.
Step 3: Fuel path on a G29
G29 gas carts use a pulse-driven fuel pump. Three lines matter: tank to pump, pump to carb, and the pulse (pulsar) line from the crankcase/engine fitting to the pump. Moisture and oil sludge in that pulse line is a frequent forum complaint—pump clicks dead even when the pump itself is new.
- Confirm fresh fuel. Old gas from last season is guilty more often than a bad engine.
- Inspect the tank pickup for a collapsed or soft rubber tube.
- Pull the pulse line at the pump and check for restriction toward the engine.
- Look at the G29/Drive fuel pipe joint and related grommets for cracks that suck air.
Earlier Yamaha pumps (G16–G22 style) are a different OEM family than some G29 pieces. Match the listing to your years. A related earlier pump we stock for adjacent models is the Yamaha fuel pump for G16–G22—only use it when your cart’s year and OEM number say so.
Step 4: Carburetor—clean or replace
If fuel reaches the carb and the cart still only runs on choke, or surges and dies, clean the carb before you condemn the whole unit. Drain the float bowl. Look for varnish or white/green water residue. Clean the main and pilot circuits with spray cleaner and air—never drill out brass jets.
Photograph throttle, choke, and governor linkage before you pull anything. On the Drive the carb sits between the airbox and the head; cracked boots create vacuum leaks that feel exactly like a dirty pilot jet.
When the carb body is pitted, the float needle is scarred, or you have already cleaned it twice, replace it with the correct G22–G29 unit: Yamaha G22–G29/Drive carburetor (2003–2016). Pair tired mounting rubber with a fresh carburetor joint for G16–G29/Drive so you are not chasing leaks after the install.
Step 5: Airbox and belt while you are in there
A soaked or collapsed filter element will make a clean carb look bad. Inspect the housing and base while the airbox is off—the Yamaha air filter housing base (G16–G29/Drive) cracks with age. If the engine starts but the cart will not move, that is a clutch/belt problem, not a no-start. Still, if the belt is glazed and you are already wrenching, a severe-duty belt like the G29/Drive G-Boost drive belt is cheap insurance for a cart that works hills.
Fitment tips and FAQ
Will a Drive2 carburetor fit my G29?
Do not assume it. Buy the G22–G29/Drive listing that matches your years and OEM number.
My Drive2 is EFI. Can I clean the carb?
There is no serviceable carb on Quietech EFI. This checklist is for carbureted G29/Drive gas carts.
It starts with starting fluid but dies immediately.
That usually means fuel delivery. Check pulse line, pickup, pump output, and the carb inlet needle before you replace coils.
It runs only on full choke.
Think pilot circuit, vacuum leak at the joint/boot, or a needle/float that is not seating. Clean first; replace the carb if passages stay blocked.
How long can fuel sit?
Long enough to varnish a bowl. Stabilize fuel for storage, or drain the float bowl if the cart will sit for months.
Bottom line
Spark first, then fuel path, then carb. Most G29 no-starts we see are stale gas, a sick pulse line, or a gummed carb—not a dead engine. Match every part to G29/Drive years and the OEM number on the old piece. Send a photo of the carb side of the engine and your serial if you want help picking the right SKU.