Old 135 idling rough

[RogerR]

The old Merc is idling rough, sounds like some cylinders stop firing every once in a while when idling, but runs good mid speed and wide open. Already changed out the hoses, they weren't bad. Will spraying carb cleaner help, or should I bring to shop?

[lightfoot]

i would not use carb cleaner on your out board check with ol don ,, (wait maybe you should change out them old ass spark plugs,,

but really check with don on the merc board
good luck

[Alan S]

<table width="90%" cellspacing=0 cellpadding=0 align=center><tr><td>Quote, originally posted by lightfoot &raquo;</td></tr><tr><td class="quote"> (wait maybe you should change out them old ass spark plugs,,</td></tr></table>

I was going to ask if it's been tuned up since the civil war.

[DOUGMCGEEFTD]

[JOHN202]

[RogerR]

Changed the plugs 4 yrs ago, that's all it ever needed.

[Rebel1]

SEAFOAM

[RogerR]

That might be what caused the problem, used it twice.

[JOHN202]

<table width="90%" cellspacing=0 cellpadding=0 align=center><tr><td>Quote, originally posted by RogerR &raquo;</td></tr><tr><td class="quote">That might be what caused the problem, used it twice.</td></tr></table>

Change the plugs, the seafoam loosened up some carbon

[RogerR]

Will look at them tomorrow

[fishingman1984]

I wish I knew if mine was idling rough I haven't been able to run it for a couple of months

[lightfoot]

order you some merc quick lean thats a good for them ol mercs,,

but i never used seafoam does it work and do u just add it to your fuel ? i see it at the auto store ,, just never used it

[Bump]

<table width="90%" cellspacing=0 cellpadding=0 align=center><tr><td>Quote, originally posted by JOHN202 &raquo;</td></tr><tr><td class="quote">

Change the plugs, the seafoam loosened up some carbon</td></tr></table>

When I first started running Seafoam, I kept getting a miss while cruising at about 4000RPM(insert 20 mph joke here). I pulled the plugs and had chuncks of loose carbon on them. Hit them with a little carb cleaner and put them back in. Had to do it 2 or 3 times but now I don't have that problem. I have since switched to Amsoil to which is supposed to have less carbon build up than Yamalube. I still run Seafoam in just about every tank. At one year old that thing was full of carbon.

[JOHN202]

<table width="90%" cellspacing=0 cellpadding=0 align=center><tr><td>Quote, originally posted by lightfoot &raquo;</td></tr><tr><td class="quote">order you some merc quick lean thats a good for them ol mercs,,

but i never used seafoam does it work and do u just add it to your fuel ? i see it at the auto store ,, just never used it
</td></tr></table>

Yeah just mix with your fuel. I use it on everything i got, but have heard lots a guys using quick kleen, so just depends what you like best i guess.

[RogerR]

<table width="90%" cellspacing=0 cellpadding=0 align=center><tr><td>Quote, originally posted by lightfoot &raquo;</td></tr><tr><td class="quote">order you some merc quick lean thats a good for them ol mercs,,

but i never used seafoam does it work and do u just add it to your fuel ? i see it at the auto store ,, just never used it
</td></tr></table>


Didn't you just have to have your fuel system cleaned out??

[Lakesport90]

<table width="90%" cellspacing=0 cellpadding=0 align=center><tr><td>Quote, originally posted by fishingman1984 &raquo;</td></tr><tr><td class="quote">I wish I knew if mine was idling rough I haven't been able to run it for a couple of months</td></tr></table>

+1

[Lakesport90]

Had that happen to me once. Ended up be a loose wire to one of the cyclinders.

[jeff210]

<table width="90%" cellspacing=0 cellpadding=0 align=center><tr><td>Quote, originally posted by RogerR &raquo;</td></tr><tr><td class="quote">Changed the plugs 4 yrs ago, that's all it ever needed. </td></tr></table>

That seems kind of long to run a set of plugs. I may be wrong though

[xpressboat87]

Uh oh do I hear another merc goin down lmao just kidding hope it ain't Nuttin serious

[RogerR]

Plugs looked good to me. The shiny spots are reflections, not metal.