Topic: Mercury KD4 – Page 5 – Antique Outboard Motor Club,Inc

This topic has 139 replies, 16 voices, and was last updated 3 years, 7 months ago by Boonie.

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January 9, 2021 at 2:31 pm #227303
dave-bernard
Participant
US Member
those filters have a thread on the bottom that screw into a bridge in the fitting. very thin . it looks like the threads have broken off in the first pics.
January 10, 2021 at 5:25 pm #227364
Boonie
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Canada Member
Need a part # for a water pump impeller for this Kd4?
January 10, 2021 at 8:24 pm #227382
Buccaneer
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US Member
This is what I have in my notes…….

18-3072 Sierra impeller for Mercury KD4

Overall Diameter ： 48mm 1.89
Shaft Size Diameter ： 11mm .433
Depth ：13.5mm .531
Blade ：6

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January 10, 2021 at 8:32 pm #227383
Buccaneer
Participant
US Member
In looking at my photos on my KD4, it appears I used parts from two different KD’s, one had a wobbler pump,
but I ended up using the Sierra impeller somehow!
Also looks like I make my own impeller drive bushing last winter. Don’t believe I ever got around to running
it to see if it worked.
Other’s have done the retrofit “different than I, so hopefully someone will say how.

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January 10, 2021 at 8:36 pm #227386
kirkp
Participant
The part number for the vane impeller is M-50-137. Couldn’t find where you have said what your serial number is. According to the info I have, depending on the number you could have a oscillator style impeller. On the first page of your post fifty2One posted pictures with all the part numbers you’ll need.

Kirk
January 11, 2021 at 8:21 pm #227496
Boonie
Participant
Canada Member
Recommended place to find decals for this motor?
January 11, 2021 at 10:02 pm #227503
Buccaneer
Participant
US Member
https://discontinueddecals.com/store/c/34-Mercury-Decals.aspx

is where I got mine.

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January 12, 2021 at 2:54 pm #227558
fifty20ne
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US MEMBER PAY BY CHECK
I get all mine from Tom Thuerwachter he has many parts for the old “K” series MERCURY’s
January 12, 2021 at 5:16 pm #227565
Buccaneer
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US Member
Winnebagolandchapterland.com takes me to some Chinese site advertising
casino’s, and perhaps more!

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January 12, 2021 at 6:48 pm #227569
Boonie
Participant
Canada Member
Thanks Guys.
Picked up a new to me motor today. 1956 Johnson Javalin, RJE-18. Good compression and spark on both cylinders. Price was right. Free! Electric start but starter missing. 30 hp. Hard to pull with a rope.
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