150 hp 1988 merc,

[leroy 1988]

Hi Guys, found this site, great! job hope you can help me....<br /><br />1988 Merc. 150 hp, oil injected, carbs.<br /><br />used my boat this week end. started fine, ran fine, after about 7 miles slowed motor down and engine killed, started engine and notice rough idling and loads of blue smoke out of exhaust, increase motor speed out of gear to clear smoke, slowed engine down and still loads of blue smoke, put in gear and motor kills, runs out of gear but kills in gear tons of blue smoke.<br /><br />got towed in:<br /><br />need advice<br /><br />Thanks <br /><br />LeRoy

 

[stocky]

Re: 150 hp 1988 merc,

G'day Leroy<br />I had a similar problem with my 85 150hp Mariner (see post sick Mariner 150). In my situation I was running around for about an hour and then decided to accelerate and motor had no guts idled realy rough and lots of blue smoke, probably unburnt fuel. Anyway I assumed it was an electrical problem as the problem resolved itself after cooling down for a while. I conducted some tests using the workshop manual and they are given on the post mentioned. Anyway it appears to be the Stator which is faulty. Not saying this is your problem but maybe a place to start.

 

[MURX]

Re: 150 hp 1988 merc,

sounds like the switch boxes to me, I've had four Mercurys........ been there done that, check a mercury manual for trouble shooting the stator rectifier and switch boxes good luck with it

 

[leroy 1988]

Re: 150 hp 1988 merc,

thanks guys<br /><br />I found my problem if you don't laugh to much I'll tell............<br /><br />total fuel cap - 58 gal.<br /><br />44 gal. of old fuel in tank<br /><br />I added 14 gal. of deisel fuel by mistake at the gas station.<br /><br />thanks anyway,,,, love this board. leroy

 

[grandx]

Re: 150 hp 1988 merc,

Gotta like an honest poster.... How did you determine this, could you smell it? This one would have kept me busy for some time.

 

[leroy 1988]

Re: 150 hp 1988 merc,

Piched off the oil feed line from top oil tank for a few minutes, still smoking bad. hooked up a remote tank, release the piched off oil line ran engine with normal smoke present.<br /><br />water test will happen tonight will post results friday.

 

[sho305]

Re: 150 hp 1988 merc,

Oh bummer, the lawnmower aint even gonna like that! Not at all.