Topic: 1968 johnson 20 long shaft parts fit 1971 short shaft?

This topic has 11 replies, 6 voices, and was last updated 7 years, 9 months ago by 1946zephyr.

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March 30, 2017 at 12:46 am #6639
PugetSoundBoater
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I have a 1968 Johnson FD 22E long shaft salty and siezed beyond repair. i have my eye on a 1971 Johnson 20R71S for sale $150 supposedly runs. May come with what looks like a Merc 110 or a Force. I see 110 on the black thin striped hood in the photos.
My question 1)- will the 5" extension and driveshaft etc long shaft parts off the 1968 fit the 1971 short shaft?
2)- the lower unit on the 1971 ,will it fit the 1956 or 57 Johnson 15 /18 hp?
Thanks, Jim PSB

EDIT the other motor is a Merc 110. Both motors for $150

"Some people want to know how a watch works, others just want to know what time it is"
Robbie Robertson
March 30, 2017 at 1:40 am #55177
frankr
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US MEMBER PAY BY CHECK
Unless there is a "gotcha" that eludes me, the answer is yes in both cases.
March 30, 2017 at 1:57 am #55179
Mumbles
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Agreed. I put a ’71- or ’72 Rude powerhead on a ’65 Johnson last year and it was pretty much a plug and play. As long as the driveshaft has four splines on top you should be good to go.

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March 30, 2017 at 2:11 am #55180
PugetSoundBoater
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That’s good news on the interchangeability. going to look at it Thursday. the $150 deal includes a Merc 110,need a coil.A dark side motor will be available soon. Thanks. Jim PSB

"Some people want to know how a watch works, others just want to know what time it is"
Robbie Robertson
March 30, 2017 at 11:54 am #55192
fleetwin
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US Member - 2 Years
That’s another beauty mumbles, how do you clean up those flywheels so nice? Bead blasting?
March 31, 2017 at 12:24 pm #55255
1946zephyr
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I believe that these are ALL interchangeable in the 15, 18, 20 and 25, from 1955 – 1973. 1955 – 1957 10hp, as well. The 5 bolt lower had a common cross over, even though the gear case and cavy plate was different in appearance. Like Mumbles said, just make sure the drive shaft has the 4 splines. Military and commercial models may be like 21 splines on the top of the shaft.
March 31, 2017 at 4:08 pm #55258
Mumbles
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quote fleetwin:

That’s another beauty mumbles, how do you clean up those flywheels so nice? Bead blasting?

I don’t usually bead the flywheels, just clean them really good before painting with Builders Cast Aluminum out of a rattle can.
March 31, 2017 at 4:17 pm #55259
PugetSoundBoater
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quote Mumbles:

quote fleetwin:

That’s another beauty mumbles, how do you clean up those flywheels so nice? Bead blasting?

I don’t usually bead the flywheels, just clean them really good before painting with Builders Cast Aluminum out of a rattle can.

Looks like you painted the carb and plate also ?
It looks real nice! Edit

"Some people want to know how a watch works, others just want to know what time it is"
Robbie Robertson
March 31, 2017 at 10:01 pm #55267
Mumbles
Participant
I like painting the mag plate and carb so I know they have been serviced with new parts and are good to go. Half the time I can’t remember what I did yesterday so painting the parts lets me know, especially when they sit on the rack for ages between uses.
April 1, 2017 at 12:41 pm #55294
fleetwin
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US Member - 2 Years
What about the mag plates, do you paint those as well?
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1968 johnson 20 long shaft parts fit 1971 short shaft?

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