Merc is smoking a bit.......

Wags · 08-04-09, 06:36 PM

Any ideas what may cause an older 150 hp Merc to smoke a bit, sometimes more than others , after starting. Even if the motor is warm and has been running on and off all day, still smokes at times after starting. My father-in-law used the phrase "gas is too oil rich" which I have no idea how you would even adjust that???

nofearengineer · 08-04-09, 06:48 PM

What color is the smoke?

If it's black, you may be running too rich an air/fuel mixture. You didn't say whether you were carbed or injected, but either way...same result.

If it's bluish gray, you may be oiling too much (2-stroke), or leaking oil into the cylinders (4-stroke...usually worn valve seals or bad piston ring seal).

I've taken it as far as my knowledge allows. If you give more info, some of the guys who know your exact motor may expound on what I've said.

1FASTLASER · 08-06-09, 07:04 AM

Year of motor would help out bud. Also have you ever done a Seafoam Shock Treatment?????? What oil are you using????? Have you ever drained the tank????? I see you live in Michigan..............you could very well have gotten a big dose of ethanol. Do you have a water seperator on your ride???? Answers these and then we can take the next step bud.

Captmikestarrett · 08-11-09, 03:01 PM

They all smoke at times.. some more than others... it helps keep the mosquito population in check.

Mercs are good at that. If it helps, just think that is is getting plenty of lube.

Capt Mike

SaIdek · 09-01-09, 02:19 AM

also comes with
ear muffs
quicksilver fuel tank
and brand new 27l scepter tank needs merc fitting
5l 2 stroke oil

08-04-09, 06:36 PM	#1
Wags BassFishin.Com Active Member Join Date: Sep 2007 Location: Swartz Creek, Michigan Posts: 163	Merc is smoking a bit....... Any ideas what may cause an older 150 hp Merc to smoke a bit, sometimes more than others , after starting. Even if the motor is warm and has been running on and off all day, still smokes at times after starting. My father-in-law used the phrase "gas is too oil rich" which I have no idea how you would even adjust that???

08-04-09, 06:48 PM	#2
nofearengineer BassFishin.Com Premier Elite Join Date: Mar 2009 Location: Southwest IN Posts: 5,630	What color is the smoke? If it's black, you may be running too rich an air/fuel mixture. You didn't say whether you were carbed or injected, but either way...same result. If it's bluish gray, you may be oiling too much (2-stroke), or leaking oil into the cylinders (4-stroke...usually worn valve seals or bad piston ring seal). I've taken it as far as my knowledge allows. If you give more info, some of the guys who know your exact motor may expound on what I've said. __________________ Many men go fishing all of their lives without knowing it is not fish they are after.

08-06-09, 07:04 AM	#3
1FASTLASER BassFishin.Com Super Veteran Join Date: Aug 2005 Location: crossett,arkansas Posts: 2,777	Year of motor would help out bud. Also have you ever done a Seafoam Shock Treatment?????? What oil are you using????? Have you ever drained the tank????? I see you live in Michigan..............you could very well have gotten a big dose of ethanol. Do you have a water seperator on your ride???? Answers these and then we can take the next step bud. __________________ Laser's rule with Merc's doing the pushing..........KEEP THE WETSIDE DOWN AND THE DRY SIDE UP!!!!!!

08-11-09, 03:01 PM	#4
Captmikestarrett BassFishin.Com Super Veteran Join Date: May 2006 Location: Accokeek MD Posts: 3,315	They all smoke at times.. some more than others... it helps keep the mosquito population in check. Mercs are good at that. If it helps, just think that is is getting plenty of lube. Capt Mike __________________ Capt Mike Starrett light tackle guide Potomac River http://www.indianheadcharters.com

09-01-09, 02:19 AM	#5
SaIdek BassFishin.Com Member Join Date: Aug 2009 Posts: 3	Merc is smoking a bit also comes with ear muffs quicksilver fuel tank and brand new 27l scepter tank needs merc fitting 5l 2 stroke oil

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