Topic: Help identifying model and year – Johnson 10 hp

This topic has 15 replies, 9 voices, and was last updated 7 years, 5 months ago by garry-in-michigan.

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May 8, 2017 at 4:16 pm #6954
63lstrition
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I picked this up to work on with my daughter as a project. A little dirty and with a few broken bolts holding on the belly pan and broken tiller mount, but outside of that everything looks to be there and it came with a pressure tank for $40. Problem is no tag with the model number. I think its a late 50’s to early 60’s, but don’t know the specifics. Hoping that someone can help by looking at the cover or matching the serial number of the plug on the powerhead. The serial number is 1943710

Thanks for your help!!

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May 8, 2017 at 4:34 pm #57296
Doug Wilson
Participant
US Member - 2 Years
Will let someone who can check the number on that tag verify it. Based on the fact it has the two line
fuel connector so would use a pressure tank. It would have to be a 1959, that was the first year for that
shroud design and also the last year the pressure tanks were used. I have a 59 5.5 and a 58 10hp both are great running
old motors. Make sure the seals on the lower unit are good, impeller is new, might also check the coils and make sure they
are not cracked. Should start 1-3 pulls every time and idle down real low if everything is good. May need tuned up and carb rebuilt
both are easy to do and not expensive to buy the parts.
Doug

Doug

how is it motors multiply when the garage lights get
turned off?
May 8, 2017 at 4:40 pm #57297
chinewalker
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US Member
I think I’ve got a tiller mount bracket if you end up needing one… Drop me a PM if interested.
May 8, 2017 at 4:48 pm #57298
kees
Participant
International Member - 2 Years
.
serial numbers between 1,743,081 – 1,995,465 makes it a 1959 model
According the Johnson year guide manual
.
May 8, 2017 at 5:03 pm #57299
63lstrition
Participant
Thanks guys! For future projects, where did you find the reference for the serial numbers?
May 8, 2017 at 5:05 pm #57300
63lstrition
Participant
Last quick question – would it be a QD-20?
May 8, 2017 at 5:18 pm #57301
adam1961
Participant
Canada Member - 2 Years
Looks like someone swapped the cowl. That is a 1960 cowl. The 1959 had only the outer trim ring on the top, not the center disc. 1959 also had decals on the sides of the hood, rather than the plastic emblems.
May 8, 2017 at 5:30 pm #57303
fisherman6
Participant
US Member - 2 Years
Yes, a 1959 10hp Johnson is a QD-20. That is what you have, but with a 1960 cover (not a big deal). They are excellent motors. I’m a fan of the QD series Johnson’s and the corresponding Evinrude Sportwins and I own several. One of which is a QD-20 (with a ’59 Evinrude powerhead). It’s an excellent runner.
-Ben

OldJohnnyRude on YouTube
May 8, 2017 at 6:31 pm #57305
63lstrition
Participant
Just to confuse things further, I have a spare motor cover that i bought in a separate auction. It is also a Johnson 10 hp, and fits this motor well. Is this the 59 that you were talking about with the stickers? It is the slightly off color one.

Thanks!

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May 8, 2017 at 6:56 pm #57307
fisherman6
Participant
US Member - 2 Years
Yessir. Your other cover is a 1959. My QD-20 is bright white, but I have a QD-22 that is about the same off white as your ’59 cover. I’m not sure if the paint on mine is original and I don’t remember what the paint codes were for the whites of the different years. Someone here has them though, if you really want to know. Here is a link to a video of my QD-20 running on my boat this spring. It’s a good indication of how these motors run when they’re in good tune.
-Ben

https://youtu.be/4s7fgw4XEYM

OldJohnnyRude on YouTube
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