My 4hp Johnson Seahorse does not run

[bozza_boatie]

I recently recieved a 4hp Johnson motor. I dont Know anything about its history or how old it is. I tried to start it,It starts but cuts out after 5 minutes. What is its problem? Can someone give me som tips on maintence. <br />Thank you

 

[G DANE]

Re: My 4hp Johnson Seahorse does not run

Hi Bozza<br /><br />Sounds like your fuel pump is out of order. Try squezzing primer bulb while running, i guess you will see it continues

 

[Paul Moir]

Re: My 4hp Johnson Seahorse does not run

While you're squeezing check to see if fuel is dripping out around the fuel line connections. Could be the seal (o-ring) there is bad and your sucking in air.

 

[Chinewalker]

Re: My 4hp Johnson Seahorse does not run

Did you just try to start it the once? Was it pumping water? Perhaps the motor overheated and stopped? Have you tried to start it again? <br /><br />Anytime you get a motor with uncertain service history, a few checks should be done before attempting to run the motor. Check for spark (both cylinders, strong blue spark), good fuel flow (you should hear the carb filling with fuel when priming the bulb, fuel should NOT come out of the carb when priming, but some may dribble out if the motor is spun over with the choke on) , inspect the impeller (recommend replacement as a matter of course). Compression can be done by "feel" if you're just trying to see what you're in for. If it feels pretty good and even, then go ahead and fire it up. <br /><br />In any case, start eliminating what it ISN'T by troubleshooting the motor one system at a time...<br />- Scott

 

[bozza_boatie]

Re: My 4hp Johnson Seahorse does not run

Thanks for all the tips IT WAS MUCH APPRECIATED.

 

[bozza_boatie]

Re: My 4hp Johnson Seahorse does not run

I cant sqeeze the primer bulb due to my boat not having one, the tank is inbuilt.

 

[madecool]

Re: My 4hp Johnson Seahorse does not run

Check out your engine good. You said you got running for a few minutes so it is worth trying a few more things. I would try these things if you already tried just skip them.<br />1) Make sure the gas is new and proper mixture and the tank is at least 1/2 way full. <br />2)I always like to get a new spark plug when I working on a engine. Also check the boot spark plug wire connection should seen clean metal if not clean the best you can.<br />3) The carburetor may need cleaning you might have take it off and clean it. Be aware some times when you take these parts off the gasket could get damaged and you will have to make a new or order a new one.<br />4) If at this point it does not run or fire up you want check to make sure you are getting a spark. Just don't shock your self in the process.<br />I could be that during the process since your first attempt to start the engine the spark went bad some how.