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  1. #1

    Default 1972 50 hp still in crate one year ago

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ID:	25590Looking at a 1972 50 hp Lark.it was in storage in the original crate. It has since been sold and returned with 2 hrs on it.the buyer did not like the electric shifting with buttons. I now have the opportunity to purchase it. I an refurbishing a 1973 Steury runabout and this would match great.not up on the electric shift motors and wondered if itís worth it.I know how they work and also problems encountered. Thinking out of the crate it might be worth it if I maintained it from new. Then Iíve heard they were ď built brokenĒ. Any input?
    Last edited by Saltwater1; 11-24-2020 at 09:53 PM. Reason: Photos

  2. #2
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    Default Re: 1972 50 hp still in crate one year ago

    There is nothing wrong with the design of those electric shift units.-----They are simple / reliable / well engineered.----Don't like push buttons , then look for the Johnson single lever control box.---Only one with the big yellow plug will work.

  3. #3

    Default Re: 1972 50 hp still in crate one year ago

    Any tips on keeping it in good shape.

  4. #4
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    Default Re: 1972 50 hp still in crate one year ago

    Install a new water pump impeller.----Test overheat horn.----Use the correct propeller for the boat / load.-----Mix gas oil at 50:1.----Use type-C gear oil ( premium blend ) for electric shift.

  5. #5

    Default Re: 1972 50 hp still in crate one year ago

    Pump and oil just done. Thanks a lot I was shying away but if I maintain it properly I think it will serve me well. I added photos

  6. #6

    Default Re: 1972 50 hp still in crate one year ago

    Their should be an owners manual in the create,read it.
    Buy a service manual

  7. #7
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    Default Re: 1972 50 hp still in crate one year ago

    Never...ever use ethanol fuel. Beautiful motor......love those Steury boats. Please post picture of boat if you can. Chrysler had push button tranys for years....pretty cool stuff. Never tow boat allowing prop to spin. You will damage prop shaft seal......That motor should be in a museum, brother. If it was me....I'd restore a '73 50 horse for the Steury..... Depending on what color is your boat.
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    Last edited by timguy; 11-25-2020 at 12:16 PM. Reason: Add photo

  8. #8
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    Default Re: 1972 50 hp still in crate one year ago

    Here is a 1973 50 horse.....one of the best outboards ever made....just my opinion.
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    Last edited by timguy; 11-25-2020 at 12:22 PM.

  9. #9
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    Default Re: 1972 50 hp still in crate one year ago

    Here's what happens to new "synthetic rubber" impellers when they sit awhile...nice, eh?
    Sadly.....the original impeller in that old 50 is way better than the "plastic" you buy today.....why? It's pure latex rubber! I suggest removal, inspection.....then re- install if still flexible and no cracks. It will likely outlast your "new one"......Hint: Brass hubs with teeth bonding to the rubber "material"....are "generally" a better quality than the others you can buy.
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    Last edited by timguy; 11-25-2020 at 02:48 PM. Reason: Add info

  10. #10
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    Default Re: 1972 50 hp still in crate one year ago

    The impeller shown in that picture appears to be from an inline 6 cylinder Mercury + other models from them.----I recommend a new impeller on those every 2 years in cold , cold water.

  11. #11
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    Default Re: 1972 50 hp still in crate one year ago

    Wow....your good, Racer! How many years experience?
    Last edited by timguy; 11-25-2020 at 04:48 PM. Reason: Typo

  12. #12
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    Default Re: 1972 50 hp still in crate one year ago

    That 1972 motor will still have the water pump with aluminum housing---which gave us a lot of grief in salt water. "Grief" such as burnt-up motors in about a year (sometimes less). Your handle being Saltwater1, I assume that means something. If it were mine, I would replace the entire pump with the improved kit with a plastic housing w/stainless steel liner. Complete improved pump kit part number is 389133.

  13. #13

    Default Re: 1972 50 hp still in crate one year ago

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  14. #14

    Default Re: 1972 50 hp still in crate one year ago

    The seller said the water pump was replaced , it was sitting in storage so long I’m sure the impeller had no flex. Just guessing I will ask if the aluminum housing was replaced.

  15. #15
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    Default Re: 1972 50 hp still in crate one year ago

    WOW! Beauty.

  16. #16
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    Default Re: 1972 50 hp still in crate one year ago

    Wonderful opportunity to see what compression reads on this " new motor "-----And good information for future reference.

  17. #17
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    Default Re: 1972 50 hp still in crate one year ago

    Are you REALLY gonna put that out in the salt? That's like taking your new Grand Cherokee to the winter roads here in Minnesota.

  18. #18

    Default Re: 1972 50 hp still in crate one year ago

    Not fulltime use , occasionally , I have this for saltClick image for larger version. 

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  19. #19
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    Default Re: 1972 50 hp still in crate one year ago

    Yes, that's another beauty.....better suited for the ocean. You have very good taste in boats. I occasionally get called to work on ships for the Navy. Service and build main engines. I really get to see salt destruction.....makes me sick. My work here on the great lakes, however, doesn't include "salties".

    Here's our "saltie" in the Philippines. Previous owner and builder stands with her. Features a direct drive 6.5 hp inboard, all wood construction with epoxy paint. Top speed about 15 mph with 3 aboard. Price down there 15,000 Phil pesos.......$300 USD. It's considered an old boat at 10 years.
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    Last edited by timguy; 11-26-2020 at 01:18 AM. Reason: Add photo/typo

  20. #20

    Default Re: 1972 50 hp still in crate one year ago

    72 electric 50 hp control box with black plug male. Yellow plug female at motor. Hole pattern seems ok . Does this need both yellow male female?

  21. #21
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    Default Re: 1972 50 hp still in crate one year ago

    The 71 and 72 model 50 HP and the 72 ----65 HP models were the only ones that used the YELLOW plug.----So yes you need both ends to be yellow.----Or you must know what to do to get around this little issue.----Do NOT try it as it is !!!----A Johnson single lever control with the yellow plug would also work.

  22. #22

    Default Re: 1972 50 hp still in crate one year ago

    There’s one pin on the black male that looks off ,close but not in-line totally, thinking it’s a 72 box with an other harness

  23. #23
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    Default Re: 1972 50 hp still in crate one year ago

    Sorry----If this was in front of me , on my work bench I could figure it out.------For you and " plug and play " you need a control with the CORRECT yellow plug !!

  24. #24
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    Default Re: 1972 50 hp still in crate one year ago

    Yellow plug is for motors with Hydro-Electric Shift AND Mag CD Ignition. Those would be the motors previously mentioned. They were the last year for Hydro-Electric and first year for Mag CD.
    Last edited by fdrgator; 12-05-2020 at 12:07 PM.

  25. #25

    Default Re: 1972 50 hp still in crate one year ago

    Thanks, I’m trying to locate the yellow plug harness. Not cheap ! Even ratty old ones. Like I said the harness with the black male end has one pin slightly off ,I think it’s pre 72 , the control box is right on with my model

  26. #26
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    Default Re: 1972 50 hp still in crate one year ago

    We know what you need.-------A YELLOW plug on the control box wiring harness.

  27. #27
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    Default Re: 1972 50 hp still in crate one year ago

    saltwater, you have a PM (Private Message)

  28. #28

    Default Re: 1972 50 hp still in crate one year ago

    Kudos to Frank ! Hooking me up with a harness!

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