MARS?

[tablesaw?]

Does anyone have any information on the military Johnson outboards? I found a 3 year old post on here about the MARS 35hp but it was very limited. The serial # in the post is similar to mine. It starts with G and is followed by numbers. I can't find any type of guide or reference to my model number. Serial number is missing. I know that a 91 fuel pump fits it. There is an M inside a square above the model number and another M on something I haven't noticed in pictures of other motors near the carb. I think it might be for using compressed air to blow water out of the system after the motor has been submerged. Thanks for any info.

 

[Bob_VT]

Is there a freeze plug? Look for the freeze plug and sometimes there is a number stamped into it. Have you spent any time checking the shopevinrude.com parts catalog? They list Johnson's too!

 

[tablesaw?]

Yes the freeze plug has the G 2595843 #.

 

[F_R]

That is the serial number. Normally, that serial number would be circa 1965. But I can't say for sure it applies in this case. Are you saying MARS is the model number? That sounds strange. BTW, the M in a square is OMC's logo.

 

[tablesaw?]

That is the # on the freeze plug and the motor is post 1990 1/2. Military Amphibious Reconnaissance System. I understand they are meant to be submerged then can be tilted to drain water and cranked.