I have a Mercury 125 on my Ranger 620 tiller. The motor starts fine, has excellent acceleration, and runs fine with the throttle opened up. The problem happens when trolling the motor will just suddenly stop. It starts right back up and runs fine for awhile but then it will just stop again. I have thought about a fuelpump but wouldnt I have problems like this at other speeds also. Could the carbs be loading up with fuel? Do I need to turn the idle speed up? Ant thoughts would be greatly appreciated.

threeway guy, have you changes the fuel filter? :lovit:Sounds like fuel starvation to me.

doubt if its the fuel filter since it runs fine at open throttle. And if it starts right back up then it has fuel. But you should change it anyway if you havent as part of a preventative maintence program.

what do the spark plugs look like? are they black and sooty?

More information please.

What year is this motor? Is it the ELPTO 2+2? Do you have the motor tilted all the way down which puts the exhaust ports under water? You might find tilting the motor up a bit will eliminate the dying.

I've had some experience with a 115 2+2, and yes they are prone to carb load up. Usually when they start to load up, the motor starts getting a rough idle then dies. Does this sound familiar? Does it idle fine and then just die? If you get that rough idle, just rev it up a bit in neutral to clear the carbs. Mike R.

I have a 90 hp ELPTO. Your problem sounds similar to what I went through for many years before my mechanic fixed the problem. What problem? While I troll the motor would make a cough or gasp for air and die. Sounds like what your motor may be doing. No problem starting it right up and going again for a while before it does it again. Didn't matter if I took her out for a 5 mile run wide open and back to trolling; back to the cough and die episodes. A real pain in the arse for sure.

SO what exactly he did I do not know. BUT it sure runs fine now. I know for sure it wasn't any fuel pump, fuel filter or anything parts related because there were no parts billed to me that day on the invoice. Been running great the past two years without any of those episodes. I run her now like I used to run her before so his magic fingers tinkered with something that cured the problem.

to rechen up the two idle mixture screws about a 1/4 turn each. It's just a little lean.