4 cyl. plug wire routing

Mercury Outboard  general discussion

4 cyl. plug wire routing

Postby Four Sons » Wed Jan 30, 2019 6:31 pm

In the linked video, at around 7:34 we see the wrap come off a 4 cylinder Mercury which is being winterized.  I don't know the model, but it looks similar to my Mark 55- maybe a Mark 50?  The spark plug wires are routed from the starboard side of the motor... I've never seen that before.  Is this normal for this motor, and why? Just curious....  

Thanks, Pat

phpBB [video]
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Re: 4 cyl. plug wire routing

Postby MartyA » Wed Jan 30, 2019 7:06 pm

MK 50 with normal wire routing. Very clean motor. [wrench.gif]
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Re: 4 cyl. plug wire routing

Postby ctpdsr » Wed Jan 30, 2019 7:36 pm

MK50 you say? Just happen to have one in the shop today. Note the distributor cap on the early FMC mags points down vs. sideways. Same as a MK40. Keep in mind the exhaust covers on the early 4-cylinder Mercs are an integral part of the cowling. No room to route wires there! The MK50 is essentially a MK40 with wrap around cowls and FGS. Quite an evolutionary period for 4-cylinder Mercs between 1953-1955!


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Re: 4 cyl. plug wire routing

Postby Four Sons » Wed Jan 30, 2019 7:47 pm

Thanks gents.  I did notice that the exhaust cover seemed 'large'...and now in Chuck's picture I can see how close it is to the lower pan- no room for plug wires!  The evolution of these motors is interesting...
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Re: 4 cyl. plug wire routing

Postby 1500J » Thu Jan 31, 2019 4:24 pm

Who is the gentleman in the video? Is he a member here?  He has other good video's.

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Re: 4 cyl. plug wire routing

Postby Four Sons » Thu Jan 31, 2019 5:53 pm

He's apparently a member of AOMCI, the Pine Tree chapter located in Maine.  From the number of videos available from this chapter, they must be pretty active.
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Re: 4 cyl. plug wire routing

Postby Mark » Thu Jan 31, 2019 7:15 pm

The gentleman demonstrating the winterizing procedure is Lincoln Davis from Waldoboro, Maine (Stetson and Pinkham Marine).  Lincoln has been a Mercury dealer and technician since 1964.  I believe that he also taught at one of the Mercury service training schools in New Hampshire for many  years.  The gentleman with the beard is Bud Bowley from Bowdoinham, Maine.  Bud was on the "American Pickers" TV show a few years ago.  

Yes, it is a Mark 50 as Chuck mentioned.  The Pine Tree Chapter of the AOMCI is very active.   http://www.pinetreeboating.com  
During the non-boating season Lincoln opens up his shop on Tuesday evenings for members to work on their various restoration projects.  They get excellent help and assistance from Lincoln.
I live in Pennsylvania and spend most of the summer in Maine.  I belong to the group and try to make it to all of their wet meets.  These are always in great locations and there are always plenty of antique outboards and vintage boats running at these events.  They have a photo of the replica Crandall Midget Flyer runabout that I recently built on their website cover page.  It is powered by a 1949 KF7.
The also have lots of great videos on their site.   Attached is a video of the boat with the KF7  that was taken at the last wet meet of the season last year.

phpBB [video]


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Re: 4 cyl. plug wire routing

Postby outboard-rob » Thu Jan 31, 2019 11:16 pm

WOW! That still photo above is beautiful ! Looks like a postcard.........Rob
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Re: 4 cyl. plug wire routing

Postby Four Sons » Thu Jan 31, 2019 11:27 pm

Nice photo!  You have to enter that one for the next year's JOMS calendar.  

Mark, we're neighbors, sort of.  I'm located in Chester County & have a long history in Maine dating to the early '50's.  My parents owned a property on Biscay Pond in Damariscotta, ME where my Dad operated the Barbour runabout and Mark 55 which I now use.
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Re: 4 cyl. plug wire routing

Postby Mark » Fri Feb 01, 2019 9:06 pm

Thanks Rob and Pat,

Pat, I've had the Crandall on Damariscotta Lake several times.  It's one of my favorite locations in Maine.  I also use a Mark 55 on an Aristocraft Torpedo and have just recently finished the restoration of a Mark 50.

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