Topic: just picked up a Mercury mark 20H at an estate sale and have some questions

This topic has 12 replies, 6 voices, and was last updated 9 years, 2 months ago by dave-bernard.

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July 1, 2015 at 2:47 am #1909
jamesrfrom
Participant
US Member - 2 Years
Just picked up this outboard at a local estate sale and i do have some questions.

what are my options for fuel delivery? Is there a way to keep the existing fitting but use a single line adapter.

How do you remove the flywheel? The nut on top looks weird.

Is the powerhead supposed to be gold or silver? The numbers on the powerhead do match the plate on the transom assembly.

Any info would be appreciated. I do not own many mercs.

Thanks
James
July 1, 2015 at 10:58 am #19281
chris-p
Participant
Wow great find!
July 1, 2015 at 3:23 pm #19292
wiscoboater
Participant
That is a very cool motor. Club member Jeff Register is very knowledgeable on those old mercs. You might trying sending him a PM. Guy really knows his stuff.
July 1, 2015 at 3:32 pm #19294
chinewalker
Participant
US Member
Nice find! With the Carter carb, to boot!

Powerhead is supposed to be gold. Doesn’t mean much, though. Not uncommon for a racing motor to get mis-matched parts, replacement cylinder blocks, etc. Yours has had the cowling and recoil painted, too, with some sort of silver detailing in the lettering.
July 1, 2015 at 3:57 pm #19298
jamesrfrom
Participant
US Member - 2 Years
The part that I question about the power head is the the numbers that are stamped into the powerhead ( the side of the engine) match the serial number on the transom assembly plate. So wouldn’t that mean that the power head is the original one?

Thanks
James
July 1, 2015 at 4:36 pm #19302
seakaye12
Participant
US Member
Mercurys have a host of special tools; one of them being a special wrench to remove that flywheel nut:

http://store.oldmercs.com/category_s/313.htm

I found that a pipe wrench and a cloth to protect the surface of the "nut" worked fine on my KE-7…..but I wouldn’t go so far as to recommend that you do that 🙂

Here’s another guy that has a lot of good quality Mercury tools…..

http://www.johnsmcintoshvintagemercuryo … Tools.html
July 1, 2015 at 5:10 pm #19303
dave-bernard
Participant
US Member
I have the fuel fitting to change to single line tank and keep the pressure lin fitting on the motor.
call me 1 914 310 7086
July 1, 2015 at 7:45 pm #19309
chinewalker
Participant
US Member
Still not uncommon for them to be painted up. As noted, yours has seen a spray can or two in its time.
July 1, 2015 at 10:51 pm #19316
dave-bernard
Participant
US Member
thanks for calling I have the fuel fitting and will try to locate the fuel pump parts.
July 1, 2015 at 11:18 pm #19319
wiscoboater
Participant
You scored BIG TIME on that one. That lower and prop are worth the price of admission.. On a racing upper the power head has most likely been apart more times then can be counted. Don’t let the non matching paint throw you. That thing is golden.
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