timing for merc 50 hp 4 stroke

[Jambone]

I want to check if the timing is set right on my 2002 50 hp 4 stroke Merc. I suspect the timing belt may be off by a notch or the system is not set correctly. Do I need a timing light or can I check things without?

Many thanks

 

[carholme]

Re: timing for merc 50 hp 4 stroke

What is your engine s/n? Do you have the service manual? If not, send me a PM with your email address and I will send you a copy.

From the manual:

NOTE: The 50/60 four stroke ECM unit electronically controls the ignition timing, therefore
making the ignition timing non adjustable. When initially running the outboard, use a timing
light to verify that the ignition timing falls within the timing windows. If the ignition timing does
not stay within the timing windows, replace the ignition ECM unit and retest.

Gerry

 

[Jambone]

Re: timing for merc 50 hp 4 stroke

Hi Gerry, I don't have the service manual. The serial # on the motor is 0G254348. I was told it was a 2002 but I can't seem to verify that. It is a 4 carburetor version. I would really appreciate a copy of the manual!
My e-mail is jamescald@live.com

Thanks

Jim

What is your engine s/n? Do you have the service manual? If not, send me a PM with your email address and I will send you a copy.

From the manual:

NOTE: The 50/60 four stroke ECM unit electronically controls the ignition timing, therefore
making the ignition timing non adjustable. When initially running the outboard, use a timing
light to verify that the ignition timing falls within the timing windows. If the ignition timing does
not stay within the timing windows, replace the ignition ECM unit and retest.

Gerry

 

[carholme]

Re: timing for merc 50 hp 4 stroke

Jim;

S/n comes up as:

MERCURY - ( 50 H.P. (1995 ))
Serial No: 0G254348 Model No: 1F50412RD

Parts listing for model 1F50412RD:

40/50 (4- STROKE) 50 BIGFOOT, 45 BODENSEE - Mercury, Mercruiser, Force, etc. Parts Lookup

Service Bulletins for s/n 0G254348:

Search Results - Crowley Marine

Manual on the way shortly.

Gerry

 

[Jambone]

Re: timing for merc 50 hp 4 stroke

Thanks again Gerry!