From a merc.115 to a 140 evinrude

[Galaxy owner]

My problems mirror a few posts here but I have a few more.Its a 87-89 got it for a few bucks after blowing up my 115.It was sitting for a few years when I got it.I have cleaned the carbs followed the de-carb directions in this forum.It misses a lick or two every other rotations and badly!Sea foamed it.That seemed to clear it up,butwhen I put it in the water it won't even idle rushing to the back with cover off I manage to grab the linkage rev it up it revs then just quits?making a funny noise in the process like a faint honking sound? ran about 4 gallons of fuel through it.Tank is fine(clean)!carbs been cleaned 5 times just to see 150 140 150 125 is the compression.Plugs are new but not the Qs you guys speak of.Carbs are sincro-ed.Wires are new does backfire a small amount through 1 or two carbs while reving does fine with the muffs on though?did I miss anything NO #S but I looked for days online found it has to be 1 of those due to the hood design Any clue to what is going on?

 

[Galaxy owner]

Re: From a merc.115 to a 140 evinrude

btw the wires aren't crossed they can't be only fit 1 way

 

[iwombat]

Re: From a merc.115 to a 140 evinrude

I think you need to check out that 125 cylinder.

 

[Galaxy owner]

Re: From a merc.115 to a 140 evinrude

thx for the response.But I was told that it falls below the 15% range.I soaked it overnight in seafoam piston @tdc or just below.Still runs good with the muffs but as soon as it hits the water it wont idle?

 

[iwombat]

Re: From a merc.115 to a 140 evinrude

10% is the range, and it is barely outside of that. But, still outside. At least check the plug in that cylinder. If it looks steam-cleaned you have a head gasket leak.

Running good on the muffs and not in the water usually means you've got one cylinder out.

Check the low cylinder, and do a spark test.

 

[Galaxy owner]

Re: From a merc.115 to a 140 evinrude

thx again,You are absolutely right. I bought a timing light cheap spark tester and I have 1 coil not firing Icould swear it was the other day???Is this common?

 

[Galaxy owner]

Re: From a merc.115 to a 140 evinrude

BTW,Is this looper? one that the carb on the right goes to the cyl. on the left?Someone told me that?? Iwombat you are the man I've had people tell me all kinds of crap!! I saw spark out of that coil I know it was firing

 

[iwombat]

Re: From a merc.115 to a 140 evinrude

Sounds like the coil is bad. And, yes it's a fairly common problem. Swap the coil with another cylinder and see if the problem follows the coil. If so, you know what to replace.

Also, if this motor is new to you, replace the impeller and do a decarb as per the FAQ.

 

[Galaxy owner]

Re: From a merc.115 to a 140 evinrude

Well I replaced a coil,And its still missing every other lick.But then it will miss but the rpms will really slow down,then sput then die.I did notice the (disconnected)oil pump/fuel?pump was making a clicking sound?any idea what the little red switch is for on what looks like the fuel pump??

 

[Galaxy owner]

Re: From a merc.115 to a 140 evinrude

It seems the switch I was talking about was something someone used to plug off the oil injector I have done all of these!! losing my :mind http://forums.iboats.com/showthread.php?t=230769&highlight=timing+140