Broken 40hp Mercury

SAMIAM · 12-05-2006, 01:10 PM

Took my 40hp Merc (2 stroke) for a last run before winterizing and noticed white smoke billowing out of the exhaust.It steadily lost power as I barely made it back to the dock before it died.It didn't run out of oil and still turns over but won't start. Nor looking for a fix by mail,just wondering if anyone had a similar problem so I'll know what to expect when I bring it in for repair. Thanks in advance.

Woodsy · 12-05-2006, 01:13 PM

Quote:

Originally Posted by SAMIAM

Took my 40hp Merc (2 stroke) for a last run before winterizing and noticed white smoke billowing out of the exhaust.It steadily lost power as I barely made it back to the dock before it died.It didn't run out of oil and still turns over but won't start. Nor looking for a fix by mail,just wondering if anyone had a similar problem so I'll know what to expect when I bring it in for repair. Thanks in advance.

White smoke is an idicator of water in the combustion chamber. Sounds like a head gasket.... might need new pistons too. You can do a quick compression test to figure it out. A quick visual check would be to pull the spark plugs.

Woodsy

SAMIAM · 12-05-2006, 06:14 PM

Thanks much,Woodsy.That will be an easy test.

secondcurve · 12-05-2006, 10:20 PM

Samiam:

I'm curious, what year is the motor?

SAMIAM · 12-06-2006, 01:35 PM

Right around 1998.....not exactly sure ,but it ran great up to that point...Might be trashed if the pistons got fried...Oh well

secondcurve · 12-07-2006, 06:44 AM

Samiam:

That seems like a relatively new motor to have the type of problems you are describing. I'd be curious to hear what your mechanic says.

SAMIAM · 12-07-2006, 10:33 AM

I'll probably wait until spring to tow it down,but will definately post the diagnosis.Just wanted a few advance thoughts so I don't get ambushed.Thanks

12-05-2006, 01:10 PM	#1
SAMIAM Senior Member Join Date: Apr 2004 Location: Moultonborough Posts: 2,924 Thanks: 350 Thanked 1,693 Times in 595 Posts	Broken 40hp Mercury Took my 40hp Merc (2 stroke) for a last run before winterizing and noticed white smoke billowing out of the exhaust.It steadily lost power as I barely made it back to the dock before it died.It didn't run out of oil and still turns over but won't start. Nor looking for a fix by mail,just wondering if anyone had a similar problem so I'll know what to expect when I bring it in for repair. Thanks in advance.

12-05-2006, 06:14 PM	#3
SAMIAM Senior Member Join Date: Apr 2004 Location: Moultonborough Posts: 2,924 Thanks: 350 Thanked 1,693 Times in 595 Posts	Thanks much,Woodsy.That will be an easy test.

12-05-2006, 10:20 PM	#4
secondcurve Senior Member Join Date: Jan 2005 Posts: 2,128 Thanks: 1,349 Thanked 564 Times in 291 Posts	Samiam: I'm curious, what year is the motor?

12-06-2006, 01:35 PM	#5
SAMIAM Senior Member Join Date: Apr 2004 Location: Moultonborough Posts: 2,924 Thanks: 350 Thanked 1,693 Times in 595 Posts	Right around 1998.....not exactly sure ,but it ran great up to that point...Might be trashed if the pistons got fried...Oh well

12-07-2006, 06:44 AM	#6
secondcurve Senior Member Join Date: Jan 2005 Posts: 2,128 Thanks: 1,349 Thanked 564 Times in 291 Posts	Samiam: That seems like a relatively new motor to have the type of problems you are describing. I'd be curious to hear what your mechanic says.

12-07-2006, 10:33 AM	#7
SAMIAM Senior Member Join Date: Apr 2004 Location: Moultonborough Posts: 2,924 Thanks: 350 Thanked 1,693 Times in 595 Posts	I'll probably wait until spring to tow it down,but will definately post the diagnosis.Just wanted a few advance thoughts so I don't get ambushed.Thanks