Mercury Mark20H Serial Number Registry

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AU52N
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Re: Mercury Mark20H Serial Number Registry

Post by AU52N »

Here is the latest update, looks like 324 serial numbers and a couple engine or parts that are associated with an identifiable Mark 20H part.

David
20H Serial List 8292017.pdf
Mark 20H list as of January 2018
(69.71 KiB) Downloaded 175 times
outboard315
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Location: Waterloo NY

Re: Mercury Mark20H Serial Number Registry

Post by outboard315 »

So that raises my question of how many were made
Brandon Cocola
Upstate NY
Mark 30H, WA25E, KG7H
14' Texas Maid, 12' Sea King, 12' Sea Nymph
dave bernard
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Re: Mercury Mark20H Serial Number Registry

Post by dave bernard »

Made 1954 1955 1956.
serial #'s from 786613 to 790612 which is 4,000
DaytonaJohn
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Re: Mercury Mark20H Serial Number Registry

Post by DaytonaJohn »

David, this craigslist shows another nametag:

https://philadelphia.craigslist.org/bpo ... 98235.html
John Timmins, Ormond -by-the-Sea, Florida. Retired licensed marine engineer from steamship companys under contract with the Marine Engineer's Beneficial Association, a union of merchant marine engineers since 1876. Ship your cargo on U.S. flag ships !
AU52N
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Re: Mercury Mark20H Serial Number Registry

Post by AU52N »

Thanks John for the heads up, we already had it on the list just the way is list on Craigslist.
David
Marcus78n
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Location: Honeoye, New York. 30 miles south of Rochester.

Re: Mercury Mark20H Serial Number Registry

Post by Marcus78n »

David, new numbers for list :

786817 tag, block number unknown, complete running popper.

787603 tag, no block number, complete running popper, has long skeg black L.U.

788160 tag, block number is 789631 +.015, complete running popper, has 25ss type L.U.

788397 tag, block number 788397, complete running popper has long 20H type L.U., all gold top to bottom.

789114 tag, block number 789114, all original green and gold, restored.

789293 tag, block number 786811, complete running popper, has short multiple hole type L.U.

789777 tag, block number 789510 +.030, un converted, less side cowls, complete running, has 25ss type L.U.,mark 25 case, KA 5A carb


Marcus
AU52N
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Re: Mercury Mark20H Serial Number Registry

Post by AU52N »

Thanks Marcus, one of your engines has the tag for an engine with the same block number that I restored and sold to a fellow in Maryland. I will post an update in April.

David
Tom Brockmeyer
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Re: Mercury Mark20H Serial Number Registry

Post by Tom Brockmeyer »

AU52N wrote:Thanks Marcus, one of your engines has the tag for an engine with the same block number that I restored and sold to a fellow in Maryland.  
And THIS situation, my JOMS friends, is why this registry is an awesome tool. I'm hoping that Marcus and the block owner can make a deal to reunite the tag and the block! "Make it happen, David"

Tom
Lake Lanier, 30miles North of Atlanta, GA
Old Mercury outboard fan... Especially the fast ones!
Mercury/MerCruiser, Evinrude/Johnson & VolvoPenta Technician (After my suit & tie wearing career was done!)
AU52N
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Re: Mercury Mark20H Serial Number Registry

Post by AU52N »

Tom
I would like to but the person we sold the engine and Sid Craft runabout has sold it and he is not available to contact.
David
Marcus78n
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Location: Honeoye, New York. 30 miles south of Rochester.

Re: Mercury Mark20H Serial Number Registry

Post by Marcus78n »

To complicate matters I do not own that motor. I believe the owner would be ok with a tag swap.

Marcus
Marcus78n
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Location: Honeoye, New York. 30 miles south of Rochester.

Re: Mercury Mark20H Serial Number Registry

Post by Marcus78n »

Tom, has anyone suggested a registry for the 55H ? I have a bunch of numbers for them also.
Tom Brockmeyer
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Re: Mercury Mark20H Serial Number Registry

Post by Tom Brockmeyer »

I'm not aware of a 55H registry... This 20H registry was started in the late 1990's by Len Lupton in Maryland and was a "Guest Book" style part of his website where you could sign in and register your own engine(s). It was lost for many years, and I dredged it up several months ago and the van Weele Bros. took it and made it much better and nearly doubled the registry.

By the way, is this Marcus in Honeoye? You should post some the reproduction items in the "For Sale" ads...
Tom
Lake Lanier, 30miles North of Atlanta, GA
Old Mercury outboard fan... Especially the fast ones!
Mercury/MerCruiser, Evinrude/Johnson & VolvoPenta Technician (After my suit & tie wearing career was done!)
Marcus78n
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Location: Honeoye, New York. 30 miles south of Rochester.

Re: Mercury Mark20H Serial Number Registry

Post by Marcus78n »

Tom, yes Honeoye, NY. I do mainly the 55H and 30H throttle cable hardware. I keep items stocked but at low quantity. I started doing those reproductions when I could not find those items anywhere else.
Tom Brockmeyer
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Re: Mercury Mark20H Serial Number Registry

Post by Tom Brockmeyer »

Marcus78n wrote:Tom,  yes Honeoye, NY. I do mainly the 55H and 30H throttle cable hardware. I keep items stocked but at low quantity. I started doing those reproductions when I could not find those items anywhere else.
Welcome to the JOMS messageboard, Marcus! Could you put your reproduction hardware pictures and a listing in the "For Sale" section for the JOMS' members?
Lake Lanier, 30miles North of Atlanta, GA
Old Mercury outboard fan... Especially the fast ones!
Mercury/MerCruiser, Evinrude/Johnson & VolvoPenta Technician (After my suit & tie wearing career was done!)
outboard315
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Location: Waterloo NY

Re: Mercury Mark20H Serial Number Registry

Post by outboard315 »

Marcus78n wrote: yes Honeoye, NY.
I'm in Waterloo NY.
Brandon Cocola
Upstate NY
Mark 30H, WA25E, KG7H
14' Texas Maid, 12' Sea King, 12' Sea Nymph
Marcus78n
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Location: Honeoye, New York. 30 miles south of Rochester.

Re: Mercury Mark20H Serial Number Registry

Post by Marcus78n »

Tom, thanks for the welcome. I will try to get some pics posted in the next few days.

Brandon, we are almost neighbors ! My mom grew up in Waterloo. Hope to meet you and others at Stans in June.


Marcus
biglargeone
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Re: Mercury Mark20H Serial Number Registry

Post by biglargeone »

I bought some throttle repo parts from Marcus TOP NOTCH! Pete in western NY
AU52N
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Re: Mercury Mark20H Serial Number Registry

Post by AU52N »

Here is the April 2018 update I promised, added about 10 more serial numbers.
20H Serial List 482018.pdf
(70.89 KiB) Downloaded 140 times
outboard315
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Location: Waterloo NY

Re: Mercury Mark20H Serial Number Registry

Post by outboard315 »

There is a couple going through the Jim Street collection.
Brandon Cocola
Upstate NY
Mark 30H, WA25E, KG7H
14' Texas Maid, 12' Sea King, 12' Sea Nymph
AU52N
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Re: Mercury Mark20H Serial Number Registry

Post by AU52N »

I have added the Jim Street engines already. Thee are six, five with visible tag numbers
Tom Brockmeyer
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Re: Mercury Mark20H Serial Number Registry

Post by Tom Brockmeyer »

788433 is on ebay now... https://www.ebay.com/itm/253715545385

May or may not have changed hands in 2017 as well... Very nice looking engine.
Lake Lanier, 30miles North of Atlanta, GA
Old Mercury outboard fan... Especially the fast ones!
Mercury/MerCruiser, Evinrude/Johnson & VolvoPenta Technician (After my suit & tie wearing career was done!)
AU52N
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Re: Mercury Mark20H Serial Number Registry

Post by AU52N »

Tom
That engine we have on the list already, it was for sale on Ebay July 2017.
David

PS I will be adding a couple more next week after I pick them up along with 3 55H's along with some other not to be named here engines and parts along with a couple of Sid Craft boats.
EdMc
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Re: Mercury Mark20H Serial Number Registry

Post by EdMc »

787118, gold 20H tower and clamps, on eBay:

https://www.ebay.com/itm/Mercury-Mark-2 ... SwtnVbmEmF
AU52N
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Re: Mercury Mark20H Serial Number Registry

Post by AU52N »

The latest list as of 12/31/2018.
20H Serial List 123118.pdf
(87.27 KiB) Downloaded 153 times
AU52N
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Re: Mercury Mark20H Serial Number Registry

Post by AU52N »

Here is the latest update for the 20H serial number list.
David
20H Serial list cut.pdf
(71.8 KiB) Downloaded 118 times
Bryan
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Re: Mercury Mark20H Serial Number Registry

Post by Bryan »

I have 790043. It is complete, as built except for some new ss bolts and has been repainted I would sell it to a member. Bryan
Benjamen McLaren
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Re: Mercury Mark20H Serial Number Registry

Post by Benjamen McLaren »

I have a Conversion with KA7A carb.
Tag is 789054
Block 788075
I have checked the PDF and it os not shown.
What a great list to have.
Thank you for all of the work David.
Paul McLaren
KG7H s, M25 on Ke7 lower, M20 on Quickie lower, M20 rat KG4 lower, Two Mark 25s, Mark 5, 1986 25HP,
Y80
AU52N
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Re: Mercury Mark20H Serial Number Registry

Post by AU52N »

Here is the 2020 updates
20H Serial List 2021 trial.pdf
(72.43 KiB) Downloaded 93 times
Bill Gohr
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Location: IL

Re: Mercury Mark20H Serial Number Registry

Post by Bill Gohr »

Hey, So I was looking at the registry for a 20H, Where do you add the numbers? I have a stock 20H Motor number 787206 and the block is 787102.

Thanks,
Bill Gohr
Tom Brockmeyer
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Re: Mercury Mark20H Serial Number Registry

Post by Tom Brockmeyer »

Bill,
Welcome to the Johns Old Mercury Site messageboard. Just posting up the info like you did will get you added to the registry. David will pick up your info and he publishes updates a few times per year depending on how many additions get put on the list.
Can you repost a more detailed description of your 20H engine? Is it bone stock original set-up except for the mis-matched block or is a converted toilet bowl engine. You can even post a picture of it here.
Tom
Lake Lanier, 30miles North of Atlanta, GA
Old Mercury outboard fan... Especially the fast ones!
Mercury/MerCruiser, Evinrude/Johnson & VolvoPenta Technician (After my suit & tie wearing career was done!)
AU52N
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Re: Mercury Mark20H Serial Number Registry

Post by AU52N »

Here is the latest update, I had to retype most of the list do to a computer screw up but that made correct a few errors I found and add new found engines or parts.
20H Serial List 9272021 Dupl for publishing.pdf
(71.62 KiB) Downloaded 48 times
DaytonaJohn
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Re: Mercury Mark20H Serial Number Registry

Post by DaytonaJohn »

787143 and 787931 are in Orlando. The lady says it was her father's up in Wisconsin. David, I told her to get in touch with you through your web site.
John Timmins, Ormond -by-the-Sea, Florida. Retired licensed marine engineer from steamship companys under contract with the Marine Engineer's Beneficial Association, a union of merchant marine engineers since 1876. Ship your cargo on U.S. flag ships !
AU52N
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Re: Mercury Mark20H Serial Number Registry

Post by AU52N »

She never reached out to me but I have added the two engines to the list along with a few others. I will submitted a revised list some time near the end of the year.
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