Raffle Winner MK55A Status

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Raffle Winner MK55A Status

Postby themoondick » Sat Jan 20, 2018 3:55 am

Hey Guys! Ive been doing 11hr days at the shop for about a year now so it's been hard to find time to play with motors. I finally got going on the Great MK55A I won in last years raffle. The powerhead was a piece of cake; great compression, carbs were spotless, mag & points like new. Water pump's dandy, gears nice too. I did fuel lines,(thanks Chris!) a seal or two & removed the rattle can paint. I picked up a great NOS prop from some dude in the Netherlands. I'm Sure I'll smack a rock with that pretty thing...
'My primer doesnt like an area of the midsection --keeps wrinkling no matter how much I sand & wipe with a thinner rag. It gets sandblasted Sunday. I hope to have it painted next week & begin assembly. Can't wait for Spring!
Shea
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Re: Raffle Winner MK55A Status

Postby outboard315 » Sat Jan 20, 2018 4:25 am

Primer drying too quickly?
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Re: Raffle Winner MK55A Status

Postby Michael » Sat Jan 20, 2018 4:51 am

incompatible paints, there must be a layer of paint from over the years and you have sanded thru to that layer and the reducer is eating the paint

not surprised your finding it so clean and in great condition, I taught the previous owner how to work on it and some of the parts I obtained for him
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Re: Raffle Winner MK55A Status

Postby themoondick » Sat Jan 20, 2018 9:43 pm

You must be right Michael. I blasted just the crummy area & the edges are now wrinkly. I'll blast the whole piece...
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Re: Raffle Winner MK55A Status

Postby bobvdinghyracer » Sun Jan 21, 2018 4:59 am

as a former body+ paint man in my earlier days (20+yrs) .... long story short .....enamel  type below / laquer  type over it  ... will wrinkle .... often if not always
 icon_thumbdown.gif  : especially if it is fresh // not cured and also if (top) is put on wet ... best to completely strip first then  :D
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 650/3,kg4q,kg7h kg7q ,wiz12h,wiz12q, mk25pop,30h,450q,25ss, 25xsmodh, 650/3cyl mod h, 35twin mod.16/21 25xd mod-16/21h
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Re: Raffle Winner MK55A Status

Postby ctpdsr » Tue Jan 23, 2018 10:01 pm

Shea,

You do realize this is a 44cid powerhead? They will run just fine with those tiny carbs, but someday - maybe not today - maybe not tomorrow, but some day you may consider the MK55A powerhead in the photo below. Carb openings machined for KA body carbs. Same idea as a MK55H 40cid race engine, but the 44 will benefit even more. Add a very mild "sport port" on the exhaust side and hold on tight!

Chuck
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Re: Raffle Winner MK55A Status

Postby daveswaves » Tue Jan 23, 2018 11:36 pm

I sand & wipe with a thinner rag.

Shea when sanding you have to clean with thinners first, then sand.  Sanding the greasy surface will impregnate the paint with whatever oil is there.  Wiping afterwards will not get that out.
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Re: Raffle Winner MK55A Status

Postby themoondick » Thu Jan 25, 2018 3:05 am

I sandblasted it completely in the back yard with a crapload of coal slag media. It's only $9 for 50lbs but doesnt cut so well. I recovered most of it in plastic sheeting, but dang, that stuff finds Every open spot in my clothing. I still need to blast the transom mounts, then off to the body shop. ---Does Chuck ctpdsr do his own porting? I assume some time in the future I'll get the hotrodding bug & I'm DONE buying motors for a while. 6 is quite enough  icon_crazy.gif  icon_crazy.gif
Shea
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Re: Raffle Winner MK55A Status

Postby Tom Brockmeyer » Thu Jan 25, 2018 3:30 pm

Don't know HOW this stuff is still sold to the general public, but Walmart still sells "Aircraft Stripper" in an aerosol can.  I think it's "Kleen Strip" brand now with an updated can.  Not long ago, the methyline chloride version in a plain white can with blue print was still in the stores.

Spray it on, wait, wash it off with soapy water (I use a pressure washer, but WEAR A FACEMASK. Tiny drop will burn your skin)  It does a really good job and doesn't put sandblasting texture into the Mercury die castings and forgings surfaces.
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Re: Raffle Winner MK55A Status

Postby Fingerlakeskid » Thu Jan 25, 2018 5:41 pm

Aircraft Stripper is one of the best on the market and works really well on the paint used on Mercury outboards. As Tom mentioned, wear protection! Also, rinse the parts with cold water. If you use hot water to disperse the stripper and paint, the vapors in the steam can burn your skin, eyes, etc.. I made that mistake once and never again! About an hour after rinsing off some parts in the shop sink under hot water, I looked like I spent a day on the beach without sunscreen.  [helpsos.gif]
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Re: Raffle Winner MK55A Status

Postby themoondick » Sat Mar 31, 2018 2:50 am

Finally got the body shop to squeeze in my pieces for paint. They've had a busy winter & my freebie stuff had to wait. Now that I completely forgot details of the teardown, it's time to assemble...
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Re: Raffle Winner MK55A Status

Postby themoondick » Wed Apr 25, 2018 1:19 am

All dressed up & ready for the first start and....starter takes a dump. No torque. I'm going to get a burger in me & try pull starting..gad.
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Re: Raffle Winner MK55A Status

Postby bayoumerc » Wed Apr 25, 2018 1:22 am

Why orange on top trim ?
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Re: Raffle Winner MK55A Status

Postby themoondick » Wed Apr 25, 2018 2:44 am

I used the nice one it came with on the mk78, so I sanded down a nasty pitted old one & painted it black---didn't like it. So I painted it "apple red" to match the boat. I like it.
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Re: Raffle Winner MK55A Status

Postby Fingerlakeskid » Wed Apr 25, 2018 2:50 am

Creative license, and that's perfectly fine. As long as you're happy that's what counts. Good job!
Stan Augustine

Mark 30 tiller,  Mark 55, Mark 58A (4) Merc 200 FGS, Merc 350, Merc 500, Merc 40, Merc 60.  1950 CZT Penn Yan Swift, 1957 Alumacraft FD, 1985 Larson Senza w/Merc 1150,
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Re: Raffle Winner MK55A Status

Postby themoondick » Fri Jun 15, 2018 12:12 am

........1 1/2 YEARS after winning the raffle I got it on the water. It's so much more civilized than my dockbusters. Starts right up, idles nicely, and I'm blown away by the grunt this thing has! It really gets up to speed in a hurry. What a great motor!

phpBB [video]
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Re: Raffle Winner MK55A Status

Postby themoondick » Fri Jun 15, 2018 12:21 am

Looks good from 20ft away!-
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Re: Raffle Winner MK55A Status

Postby Toby Hall » Fri Jun 15, 2018 1:05 am

Nice! Looks good back there.  icon_thumbup.gif
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Re: Raffle Winner MK55A Status

Postby Tom Brockmeyer » Fri Jun 15, 2018 10:59 am

Looks and sounds great!   Is that a Cutter "Jet de Ville" boat!??   I had one with a Mark58A myself.
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Re: Raffle Winner MK55A Status

Postby Four Sons » Mon Jun 18, 2018 12:45 am

Love the sound of that motor in your video.  Just makes me smile.  I never get tired of hearing that sound and looking back at the pattern of the wave created by boat & prop!  Thanks for posting the update.
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Re: Raffle Winner MK55A Status

Postby 58woody » Mon Jun 18, 2018 1:15 am

Great point about the great sound! Excellent work.  [drinkingcheers.gif]
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Re: Raffle Winner MK55A Status

Postby themoondick » Mon Jun 18, 2018 1:45 am

Yes, its a Cutter. I assume Jet deville--It looks like others I've seen but it no access hatch on the rear deck. I found this old serial # tag laying under the seat. Must be a really early one. It's in awful condition but I've grown attached to it---it gets smiles at the dock
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