Part of our complete Small Engine Troubleshooting Guide.
Work through it in this order. The first two steps are free and account for a good share of the machines that reach us not starting, and each step afterwards tells you something the next one needs. If yours is a four-wheeler rather than a side-by-side, our guide to an ATV that will not start covers the shorter list those have.
Park it on level ground, selector in park, parking brake set, and pull the key before you reach past the seat. A UTV that suddenly finds its starter with somebody leaning over the engine bay is a serious way to get hurt, and so is a winch that decides to run while a hand is on the cable. Disconnect the negative battery lead before you touch any accessory wiring.
1. The Selector, the Brake and the Seat Belt
Nearly every side-by-side refuses to crank unless its interlocks are all satisfied, and there are more of them than on a quad. The gear selector has to be properly home in park or neutral, the brake usually has to be applied, and on a lot of machines the seat belt has to be latched before the starter will turn at all.
Two of those fail quietly. A selector left resting between gears feels like it is in park and is not, so work the lever firmly home and try again. And a belt buckle full of hayseed, or one whose switch has given up, reads to the machine as an unbuckled driver. Latching it slowly and firmly is a thirty-second test that has saved plenty of people a tow.
2. Nothing at All? Start at the Main Fuse
Separate the two failures before you spend anything. A machine that gives one click, or cranks slowly, has power getting to the starter. A machine that does nothing — no dash, no click, no fuel pump whirring at the key — usually has lost power well before that.
The main fuse or fusible link is the first place to look, along with the fuse box under the hood or behind the dash, and it is worth pulling the suspect fuse and looking through it rather than trusting a glance. After that come the battery terminals, the ground strap where it bolts to the frame, and the ignition switch itself, which gets a hard life on a machine that lives outside. A machine that will start when you wiggle the key is telling you which one it is.
3. A Slow Crank on a Machine Full of Accessories
This is the UTV-specific one. Work machines collect a winch, a light bar, a sprayer pump, a cab heater, and each one is a draw the machine was not sold with. Add the short run times that come with hauling and plowing, which never fully recharge a battery, and you get the machine that cranks slower every week until it will not crank at all.
Clean and tighten both terminals, check the ground strap, and look hard at anything wired straight to the battery without a fuse, because that is what flattens one in a shed. A battery that charges and holds points at the charging side; one that will not hold at all is replaced rather than nursed. Our guide to batteries and slow cranking covers testing one properly.
4. Cranks Steadily But Will Not Fire
A machine that spins over at a healthy speed and never catches has lost fuel or spark, and on anything that has sat it is nearly always fuel. Ethanol-blended fuel takes on water and leaves varnish behind, and a few months is enough to turn a full tank into the reason nothing fires.
Drain the old fuel, put fresh in, and fit a new filter rather than looking at the old one. On a fuel-injected machine, listen at the key: the pump should run for a second or two before you crank, and silence there sends you back to a fuse, a relay or the pump's wiring. On an older carbureted unit the varnish collects in the float bowl and the jets, which is an ordinary carburetor clean and rebuild. Our guide to ethanol gas and small engines covers how to stop it happening again.
5. Spark, and Why a Twin Can Fool You
Most side-by-sides run a twin-cylinder engine, and that changes what a spark fault looks like. One dead plug, cracked cap or failed coil on a twin does not leave you with a machine that does nothing — it leaves one that fires, runs badly, shakes and dies, which is easy to read as a fuel problem.
So pull both plugs, not one. Look for fouling, a wet plug that says it is flooded, a dry plug that says it is getting no fuel, and an electrode worn past its gap. Check the caps are pushed fully home and the leads are not chafed on the frame. Replace plugs as a pair, because a new one beside a worn one just hides the problem.
6. Barn Faults and the Diesel Case
A machine that lives in a barn gets faults no checklist predicts. Mice chew harnesses and nest on the airbox; damp gets into connectors and leaves corrosion that looks like nothing and conducts like nothing. A walk along the loom, reseating the connectors you can reach, finds more of these than testing does.
If yours is one of the diesel side-by-sides, add two things to the list: water in the fuel, which collects in the filter bowl and is the first thing to drain, and the glow plugs or intake heater that a cold diesel needs before it will fire at all. Neither is exotic, but both are easy to miss when you are working through a petrol machine's list.
Matching the Symptom to the Cause
READING THE SYMPTOM
| What It Does | Where to Look First |
|---|---|
| Dead silence, no dash lights, no click | The interlocks, then the main fuse, the terminals and the ignition switch. |
| One click, or cranks slowly | Battery charge and the ground strap, then accessory draw, then the solenoid. |
| Cranks well and never fires | Last season's fuel and the filter, then the pump at the key, then spark. |
| Fires, runs rough, dies | One plug, cap or coil on a twin. Pull both plugs and compare them. |
When to Call the Shop
Working the selector home, latching the belt, pulling a fuse, cleaning two terminals and putting fresh fuel in are all barn jobs, and between them they fix a good share of the side-by-sides that arrive here not starting. If one of them fixes yours, note which, because the same one tends to come back.
Bring it to us when the starter clicks with a known-good battery, when the fuel pump stays silent at the key, when it will not fire on fresh fuel and good spark, or when the fault moves around as you drive it, which is a wiring or ground problem that needs a meter and a diagram rather than a guess. We will tell you plainly what it needs and what it would cost, with a firm quote before any work begins. For the service side of the same machine, our UTV and side-by-side service guide for farm work covers what keeps it off this list.
UTV No-Start FAQ
My side-by-side was fine last fall and now does nothing at all. Where do I start?
Check the gear selector is fully in park, the brake is down and the seat belt is latched, then the main fuse. Those three cost nothing and account for most of them.
It cranks strongly but will not fire. Is that the fuel pump?
Usually it is the fuel itself. Pump-out last season's fuel, fit a fresh filter and try again before anyone buys a pump, because stale fuel is far commoner than a failed one.
Why does mine crank slowly every Monday morning?
Short run times that never recharge the battery, plus a winch or light bar drawing on it between jobs. Clean the terminals, check the ground strap and fuse any add-on wired to the battery.
Do you work on UTVs and side-by-sides in Richmond, KY?
We do, across Madison County. Electrical and interlock faults, starters and charging, fuel systems, clutches and drive belts, with pickup and delivery available and a firm quote before any work begins: (859) 661-8877.
Side-by-Side Dead in the Barn? Get a Firm Quote First.
Honest diagnosis, fair pricing and fast turnaround from Turf & Trail Small Engine Repair in Richmond, KY. We will tell you what it needs before we do it, and what it is not worth spending on. If it starts fine but will not pull, that is the drive rather than the engine.
We handle UTV and side-by-side repair, ATV and four-wheeler repair and the pickup and delivery in Madison County that means a machine which will not start does not have to be pushed onto a trailer. Serving Richmond, Berea, Waco and Kirksville.
Call (859) 661-8877