Outboard troubleshooting: Need some help diagnosing a small problem with my Mercury 25 hp 4 stroke. Great motor. Really like the displacement. Lately it has been stalling while...

Boomer

Need some help diagnosing a small problem with my Mercury 25 hp 4 stroke. Great motor. Really like the displacement. Lately it has been stalling while trolling at idle/slow speed. As many as 7 or 8 times per hour. Frustrating!
Could this be remedied simply by adjusting the idle up a bit? Or ??

Any help would greatly appreciated.

Boomer

Maximo Loc: Jupiter, Fl

Sounds like you may have a fuel blockage. Partially clogged carb jets. Also, check all your electrical connections. Maybe there’s one working it’s way loose. Let us know what you find out.

Gordon Loc: Charleston South Carolina

Pm Jeremy. He knows a lot about engines

Robert J Samples Loc: Round Rock, Texas

I agree, sounds like a fuel problem. I have no experience with Mercs. With Evinrudes it could also be the fuel pump. I don't know if Merc's have a similiar system or not. Just Sayin...RJS

Ron620DVS Loc: Guntersville Alabama

Boomer wrote:

Need some help diagnosing a small problem with my Mercury 25 hp 4 stroke. Great motor. Really like the displacement. Lately it has been stalling while trolling at idle/slow speed. As many as 7 or 8 times per hour. Frustrating!
Could this be remedied simply by adjusting the idle up a bit? Or ??

Any help would greatly appreciated.

Boomer

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You may want to check with this web site for help. I believe that there may be a charge for there service.

Please click on links for additional information, Thank You.

http://www.fishingandboats.com/boat-forum.html

http://www.bbcboards.net/showthread.php?t=22490

......🎣🐠🐸🦞USA....."Gone Fishing!!-----~~~<*))}}}}>><{{ 🎣🐠🐸🦞

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You may want to ask around on this web site they are very knowledgeable and helpful.

Please click on link for additional information, Thank You.

http://www.bbcboards.net/showthread.php?t=667376

......🎣🐠🐸🦞USA....."Gone Fishing!!-----~~~<*))}}}}>><{{ 🎣🐠🐸🦞

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Ron620DVS Loc: Guntersville Alabama

Boomer wrote:

Need some help diagnosing a small problem with my Mercury 25 hp 4 stroke. Great motor. Really like the displacement. Lately it has been stalling while trolling at idle/slow speed. As many as 7 or 8 times per hour. Frustrating!
Could this be remedied simply by adjusting the idle up a bit? Or ??

Any help would greatly appreciated.

Boomer

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The fuel filter/filters may need to be replaced. How old is the gasoline and do you use a gas stabilizer or SEA-FOAM, Or use StarTron/starbrite fuel treatment at EVERY fill up.

Make sure the vent on the gas tank was open and then pumped the little bulb on the gas line a few times and cranked it back up. You didn't say how old the motor is but the fuel supply line/bulb pump may need to be replaced.

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Ronniejw Loc: West Point MS

Fuel filter, have you changed the spark plugs?

EasternOZ Loc: Kansas City Metro

Gordon wrote:

Pm Jeremy. He knows a lot about engines

If Jeremy tells you let us know please

Gordon Loc: Charleston South Carolina

EasternOZ wrote:

If Jeremy tells you let us know please

He hasn't been on sense Friday.

EasternOZ Loc: Kansas City Metro

Gordon wrote:

He hasn't been on sense Friday.

Hope the fire is not the reason.

Gordon Loc: Charleston South Carolina

EasternOZ wrote:

Hope the fire is not the reason.

Didn't think about that OZ. Hope not

EasternOZ Loc: Kansas City Metro

Gordon wrote:

Didn't think about that OZ. Hope not

Then here in the next few days it will be everyone in the gulf area we will be worried about.

USA been getting hit pretty hard from several directions lately.

Fredfish Loc: Prospect CT.

Gordon wrote:

He hasn't been on sense Friday.

Hey G, I think he said he was going 4wheeling at the ranch for the weekend.

Gordon Loc: Charleston South Carolina

Fredfish wrote:

Hey G, I think he said he was going 4wheeling at the ranch for the weekend.

Good to hear Fred. Thanks for the heads up. Now just hope for the best for the people on the gulf coast.

threeCs Loc: Allen Texas

Boomer wrote:

Need some help diagnosing a small problem with my Mercury 25 hp 4 stroke. Great motor. Really like the displacement. Lately it has been stalling while trolling at idle/slow speed. As many as 7 or 8 times per hour. Frustrating!
Could this be remedied simply by adjusting the idle up a bit? Or ??

Any help would greatly appreciated.

Boomer

I would suggest checking carburetors for blow back which would indicate reeds not seating