K case I.D. no casting numbers

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MikeSea7
Posts: 64
Joined: Mon Jun 19, 2017 8:17 am

K case I.D. no casting numbers

Postby MikeSea7 » Sat Nov 11, 2017 7:50 pm

Hi Folk's,
Just wondering what this case is from no casting numbers?
k case 3.JPG
k case 3.JPG (31.31 KiB) Viewed 160 times

k case 2.JPG
k case 2.JPG (33.39 KiB) Viewed 160 times

k case 1.JPG
k case 1.JPG (33.38 KiB) Viewed 160 times

Thanks,
Mike
Mike

Do it like you mean it Or......Don't bother. ;)

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20mercman
Posts: 482
Joined: Mon Mar 09, 2015 4:13 pm
Location: Kenosha Wisconsin

Re: K case I.D. no casting numbers

Postby 20mercman » Sat Nov 11, 2017 10:43 pm

It's either a Mercury Mark 15 or 20. Most likely a Mk-20 as there were a lot more of them built. The boss on the starboard side is for mounting the linkage for the throttle/magneto. The boss on the port side is for the air pressure pump for the pressure tank.

Steve

MikeSea7
Posts: 64
Joined: Mon Jun 19, 2017 8:17 am

Re: K case I.D. no casting numbers

Postby MikeSea7 » Sun Nov 12, 2017 6:53 am

Hey Steve,
Thank you very much I am new to outboards and never saw this style of case.
Mike
Mike

Do it like you mean it Or......Don't bother. ;)

Dave Bernard
Posts: 544
Joined: Wed Mar 11, 2015 12:00 pm

Re: K case I.D. no casting numbers

Postby Dave Bernard » Sun Nov 12, 2017 10:57 am

I would lean more toward the Mark 20 due to the size of the carb opening.

foot_doctor
Posts: 31
Joined: Tue Mar 10, 2015 7:23 pm

Re: K case I.D. no casting numbers

Postby foot_doctor » Sun Nov 12, 2017 11:41 am

It's pretty simple to tell the differance between the MK15 and MK20 cases. The MK20 was equipped with the larger, high speed SJ7173 roller bearing. The Mk15 used the full complement Torrington drawn-cup needle. In addition they both had the same size carb opening, but you should be able to discern the outward appearance of the MK20 case by the flat almost rectangles cast on the exterior of the bottom crank throw areas

MikeSea7
Posts: 64
Joined: Mon Jun 19, 2017 8:17 am

Re: K case I.D. no casting numbers

Postby MikeSea7 » Sun Nov 12, 2017 3:42 pm

Ron,
It had the 7173 bearing assembly in it.
IMG_2148 MK20.JPG
IMG_2148 MK20.JPG (38.77 KiB) Viewed 66 times

Thanks,
Mike
Mike

Do it like you mean it Or......Don't bother. ;)


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