Boat motor starts but wont stay running

Make sure a fuel problem isnt the culprit. Most outboards will not crank if the boat is in gear.

If the engine cranks slowly or doesnt crank at all its possible your battery may be dead or low.

Boat motor starts but wont stay running. First you need to check if you have a portable fuel tank that has a screw-type vent. In most cases people tend to overlook this vent and end up being closed. Open the screw which will in turn cause the engine to begin running properly.

If you are using a boat with an installed fuel tank you need to examine the tanks vent. Motor will start but wont stay running. Hello all Im a newbie to this and looking for help.

I have a 1985 Yamaha 90etlk 2 stroke it will start and run at WOT but die seconds after putting it to idle. I have cleaned the carbs checked if Im getting gas to the bowls and checked the sparks and everythink seems to be good. Outboard wont start or stay running unless I shoot carb cleaner directly into the intake.

Then it runs great and will stay running on carb cleaner. Already checked fuel pumps and rebuilt them. There must be a problem in between the fuel pumps and the carburetor.

Engine will not stay running without choking Thanks I am going to soak and clean one more time. The primer bulb does relax after the motor starts. We had sprayed carb cleaner around carbs checking for leaks with no changedo you suggest rebuild kits at this point.

Thanks again for the help looking in the right place. 43 liter mercruiser engine starts but will not stay running. There is live power to the electric fuel pump with the switch in the cranking position however when switch is released the on position the live power at the fuel pump ceases and the engine will not stay running.

Switch and fuel pump and starter and solenoid have all been recently replaced. A bad coil would but it seemed in your original post that the motor started while cranking then died when the key was turned to the run position. If this is true then the coil is OK.

Rather than run the new wires that you mention just turn your key on and see if 12v is present on the side of the coil. 18 rows Engine Starts But Will Not Keep Running. I have a 1996 lowe pontoon boat with a 1999 50 hp Johnson motor.

I just bought this boat and its my first boat. I bought new plugs and a boot to put water on the engine for testing it out. After cleaning the carbs and replacing the fuel lines and cleaning the tank.

Fogged the cylindars and started right up. But the engine will not shut off. My engine starts and runs at high idle BUT will not idle once warmed up.

The only way I can keep it running is to up the rpm to around 1200 or more. I have checked plugs wires vacuum lines replaced coil. I removed the gas line from carburetor and I can fill a bottle slowly as I turn the engine over - mechanical pump.

Outboard Boat Engine wont stay running - Adjust Carburetor FuelAir Mixture - EASY - YouTube. Open up the screw and the engine should start running just fine. If youre on a boat with an installed tank you need to check the tanks vent.

Mud wasps are commonly the culprit in this situation. I finally got the engine to crank with every turn of the key but it will not run. It starts and it may run for a few seconds then it dies.

Possibly could have messed something up when I removed the carbs and cleaned them but it does start and run wellfor a few seconds. I can get 20-30 seconds at best. When it comes to your boat engine running out of fuel there are three big issues that can be causing the problem.

Either the engines lift pump has failed the boat is out of fuel. Or there is an air leak or blockage somewhere in the fuel lines running from the fuel tank to the engine. Make sure a fuel problem isnt the culprit.

Fuel problems can sometimes be mistaken for ignition problems. Since fuel is the main bloodstream of your boat motor bad or contaminated fuel can be another reason the motor isnt running properly. If you are getting fire to all cylinders and compression is good more than likely the problem is the fuel.

Tecumseh wont stay running. I took the carb off my tecumseh HSSK40-55610S engine to clean and rebuild it. Soaked it good blew it out replaced the needle seat and needlefloat looked good replaced the idle mixture needle valve and the main.

When I got it back on the snowblower it will only run. Most outboards will not crank if the boat is in gear. If the engine wont crank but other lights and gauges work correctly check that the gear shift is in neutral.

If the engine cranks slowly or doesnt crank at all its possible your battery may be dead or low. Use a voltmeter to check the condition of your battery. Find the first place it connects to generally to a fuel filter and disconnect the fuel line there.

Insert the clear hose into the fuel line prime up the engine and start it up. Let it run for a little while and carefully watch the fuel passing through the clear hose. You have to keep your foot on the gas to keep the vehicle running.

In this case you are required to disassemble the sensors out of the throttle body. Using a throttle cleaner spray on it to dissolve the stains and carbon out of it. The boat starts fine at home with the ear muffs but wont start when we launch it in the bay.

The boat just had the upper unit and carb rebuilt with all new fluids in october 07 by professional mechanic and tested fine in the shop. It hasnt been run in the. Leave the motor off and tilt it up to check then remove whatever you find.

Make sure to get it all. If the motor wont start dont just keep pulling and pulling or wearing the battery down. Systematically think about what the problem is most likely to be and check those items first.