Outboard Motor Won’t Start. Won't start again until gas is evap … read more Come back out after a while and it will start right up. This might happen if you don't disengage the choke fully, if your outboard has low compression in one or more cylinders, if the engine's sensors fail or because a bit of gas -- more than can evaporate before you try to start it again -- continues to flow after you turn off your engine. Most outboards won't start unless the shifter is in neutral. If it is, and the engine won’t fire, proceed to “Spark Check,” below. Double-check that the motor hasn't been left in gear by moving the shifter in and out of gear a couple of times. Advertisement Of course, we're barely scratching the surface of what can go wrong with an outboard, and how to fix it. It will start right away and idle when I first put it in the water (every time). Look for obvious causes. Typical, after sitting up start, is two, maybe three pulls and it's up and running. Or, it would be, if you hadn't seen this video on basic troubleshooting when your outboards won't start. Mercury f25m 2006 Not rated yet Motor will start run perfect but when I go to use boat the next morning,it won't start. Come back out after a while and it will start … If it were a leak as described above, I understand that a compression test will find it. My 97-98 Mercury 40hp outboard won't start after it has warmed up. If your motor has an electric starter, troubleshooting the battery is not unlike a car. I have a 1999 Yamaha 4-stroke 15hp outboard. An outboard floods when there's too much gas in the air-fuel mixture. Next time it won't start after it warm find the solenoid and there is a red level on it. If your motor doesn't start turn the red lever forward and back 3 or 4 times and I bet she will fire right up. Five to 15 pulls wearing yourself out to re-crank. BUT when I go to restart the motor after I have been sitting in a fishing spot, it won't start. It also runs very strong after it is first started. The engine is starved for fuel, and won’t start. This happens over and over again, because many quick-disconnect fittings that attach the fuel line to the outboard are just plain cheap. The mix becomes so rich it won't burn. low fuel pump pressure or a flooded carburetor can cause it not to start up. The same goes for the barbs that attach the fitting and the fuel line, and/or the hose clamps that secure them. Installed new carburetor but it leaks gas out of breather after starting then stops running after thirty seconds or so. Engine Cranks But Won't Start Kill Switch: A simple thing to overlook; ensure that the emergency shutoff switch cap is in place. Small outboards give us the freedom to roam away from the dock and past the mooring field. If you turn the key and only hear a clicking, it might be that the battery is dead. Any suggestions on what this could be? It's easy to tell if this is your problem. Runs fine, then if you shut off and try to re-crank, it won't! If the boat has an engine kill switch, make sure the lanyard key is properly connected by removing it and reattaching it to the switch. The red lever is a manual primer. Spark Check: Your outboard needs spark at the spark plugs in order to start… Unless you’re booked into a slip, an engine that won’t start puts a major crimp in your plans, whether you’re headed out for a weekend or living on the hook. Mercury 9.9HP (9.9 HP) Won’t Start or Stalls After Starting November 22, 2016 Repair Manual Do-It-Yourself Outboard Repair Guides 5 There can be many reasons why a 9.9 horsepower Mercury outboard will not activate; e.g.
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