Motor Help Please

[troutman10]

So I'm all excited to get out and do a trial trip to make sure everything is working when I start having motor trouble at the launch. Here is the scenerio. Any help is greatly appreciated.

My motor starts right up on choke. I leave it running and after about 5 minutes then it stalls out. I start it up again and it does the same thing. I decide to tinker around with it by starting it in choke, quickly taking it out of choke and then putting it in forward. I take off and it stalls out while in motion. I do the same thing again with the same result of stalling out while in motion. Then I try to keep pumping the gas while I'm in motion and the motor responds by running fine. As soon as I stop pumping the gas the motor quits again. I happened to notice a small amount of gas going in the water next to the motor as I'm pumping. The gas was coming out of the upper housing area. I took the top cover and the sides off of the motor without any success of finding where the leak was coming from.

Has anyone had a similar experience? My motor is a 1998 Suzuki 15 Hp 4 stroke. I havn't had any problems with it until now. I bought it used about 5 years ago and the nearest place to get a Suzuki serviced is an hour away. The engine oil and filter are new, the gear oil is new and the fuel filter is new. Any help would be greatly appreciated.

[bbolger]

Make sure hose from tank to motor are a good seal at both ends..... also in my haste in the past i have forgotten to vent the tank. Good luck!

[FishinEd]

Do you drain the carbs in the fall? I have had problems with varnish in the carbs plugging the jets if gas sits in it too long. Also, if you have a small gas leak under the hood, you may have a small hole in the fuel line.... which means it will suck air when you are not pumping fuel by hand... actually, that sounds more like it cause it runs for 5 minutes.. probably just about a carb bowl full befre it quits.

[LongLine]

I'm guessing 1 of 2 things: . 1- fuel pump is on the way out. Primer ball is stronger than your fuel pump & will fill carbs quickly. 2 - see #1.

Tom B.

(LongLine)

[lakebound88]

the primer check valve could be stuck, stopping flow of fuel to the engine. How old is the hose?

[Hookedup]

Had it happen with new 4 stroke last year one of my fuel lines was sucking air at the tank. Also had it happen with an old two stroke once that had a bad fuel filter. If you pump the primer ball and it never gets hard you got air coming in at some point.

[PaulR]

If fuel line is ok you probably need a fuel pump.

Paul