Evinrude 112 SPL tilt trim, motor running rough

[Texas Redfish]

1) Tilt/trim is stuck. When I push the up or down button, the only thing that happens is the relays click. I replaced the relays - no result. No fluid leaks, etc. Before the tilt/trim stopped working completely, it worked intermittently for a short while.

2) Same outing - motor started running rough, and won't idle properly. I installed fresh plugs, and noticed the top right cylinder as viewed from the rear had burned the plug black. :faint2:

I recently replaced the powerpak and had the carbs rebuilt.

Any help would be greatly appreciated !

 

[racerone]

Re: Evinrude 112 SPL tilt trim, motor running rough

The black plug may indicate that the cylinder is cold.----Plug is not getting hot to keep clean.----So the #1 check on that particular motor is a compression test.---Then you check and see if spark will jump a gap of 5/16" or more with a snap you can hear.----Report what you find please.

 

[boobie]

Re: Evinrude 112 SPL tilt trim, motor running rough

Got a model # ??? Give the T/T motor a few raps with a screw diver handle once and see what happens.

 

[emdsapmgr]

Re: Evinrude 112 SPL tilt trim, motor running rough

You said no apparent trim fluid leaks....did you pull the fill plug to actually see if the reservoir was full of trim oil? A blackened plug could indicate overfueling. You could pull the airbox cover off and see what the fuel looks like going into the carbs when running. I'd also do a spark check when cranking, or a cyl drop test when running. Nice to know if it's actually firing on all 4 cyls.

 

[Texas Redfish]

Re: Evinrude 112 SPL tilt trim, motor running rough

Got a model # ??? Give the T/T motor a few raps with a screw diver handle once and see what happens.

Thanks, I will try knocking on the trim motor, and let you know. I've seen that work with frozen auto starters. I'll have to check for model #.

 

[Texas Redfish]

Re: Evinrude 112 SPL tilt trim, motor running rough

You said no apparent trim fluid leaks....did you pull the fill plug to actually see if the reservoir was full of trim oil? A blackened plug could indicate overfueling. You could pull the airbox cover off and see what the fuel looks like going into the carbs when running. I'd also do a spark check when cranking, or a cyl drop test when running. Nice to know if it's actually firing on all 4 cyls.

No, it's out in the driveway and the weather turned foul ! Maybe I can check it today. Yesterday, I filled a 5 gallon tank with fresh ethanol-free white gas, fresh oil, and 5 oz. of Seafoam, and ran it on that. Although the gas in the main tank was EtOH-free and had StaBil in it, the boat hadn't been run since last April's trip to the Florida Keys. I noticed a big difference with the fresh fuel . . . but it was still coughing just a little bit. I revved it up to 5500 rpm real quick on the hose, and in jumped right up there. I know you really shouldn't do that on the hose, but I backed it right back down. Previous to the new gas, it wouldn't run over about 2500 rpm. Of course the old gas LOOKED fine, RACOR filter was clean, etc. . .

The boat may run just fine in the water. I'll try to do your other checks today, and report back. THANKS!

 

[Texas Redfish]

Re: Evinrude 112 SPL tilt trim, motor running rough

Got a model # ??? Give the T/T motor a few raps with a screw diver handle once and see what happens.

I will check for # and whack on that pump motor this afternoon. THANKS! See reply below re/ Yesterday's fuel test.

 

[emdsapmgr]

Re: Evinrude 112 SPL tilt trim, motor running rough

That engine will seem to run just fine on 2-3 cyls when on the trailer. You need it firing on all 4 when it's in gear in the lake. An engine will run on fuel with a little water in it, just won't make any hp-so stick with fresh fuel. Ethanol fuels attract water naturally, so it can go bad after months of storage.

 

[Texas Redfish]

Re: Evinrude 112 SPL tilt trim, motor running rough

Right. I run ethanol-free gas only. Regardless, even with Stabil, the fuel was bad after sitting for 10 months. No water in the tank--I think the evaporation leaves varnish, though.

 

[Texas Redfish]

Re: Evinrude 112 SPL tilt trim, motor running rough

Still rainy and cold in South Texas! Maybe I can try your tests and get model # this weekend.

 

[Texas Redfish]

Re: Evinrude 112 SPL tilt trim, motor running rough

90 lbs. compression on 3 cylinders, 30 lbs. on the bad one !:facepalm: And, when I inspected the trim motor, I discovered a large hole had rusted all the way through it! I can't believe it worked as long as it did! So, I suppose I should pull the head and inspect that bad piston. A friend here on the Island, a marine mechanic, says if the cylinder is scarred badly, I may get by with a new piston and rings.

 

[Texas Redfish]

Re: Evinrude 112 SPL tilt trim, motor running rough

Where do I find the model number? Also, I found a rebuilt "long block" powerhead for $1300. That may be the fastest, easiest way to go. Any thoughts, folks? Reman OMC Johnson Evinrude V4 Crossflow BUBBLE112 115 HP Outboard Powerhead | eBay

 

[racerone]

Re: Evinrude 112 SPL tilt trim, motor running rough

This is very common on the crossflow engines.---Might be a bad head gasket------That is why a compression test is the first step in trouble shooting one of these.---------Many folks will clean carburetors / install powerpacks / stators etc as a guess. That does get expensive.---------------Take the cylinder head off and have a look in there.-------If it is a cylinder / ring / piston ring problem then rebuild it with WISECO pistons.--------Then it will run properly for a long time.

 

[emdsapmgr]

Re: Evinrude 112 SPL tilt trim, motor running rough

You can replace just that bad piston. Even if it's requiring an overbore. Just make sure you get an original factory piston, so that it matches the other 3. (I would not mix pistons from various manufacturers in an engine.) Also, I'd to an autopsy on the carb that feeds the bad cylinder. Could be a fuel restriction in the main jet on that one carb throat. Best to figure out why it failed before you reassemble and try to run it. The model/serial number is on the id tag on the engine's swivel bracket.

 

[Hinand86]

Any resolution to what was wrong with the tilt/trim motor? Sorry I know it’s an old post. Any info greatly appreciated

 

[GA_Boater]

Any resolution to what was wrong with the tilt/trim motor? Sorry I know it’s an old post. Any info greatly appreciated

If you start a thread of your own, you might get some answers from those that are still here, unlike the the OP who joined and left within 2 weeks.

Closed.