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197x Evinrude with problems

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mrnobuddyspecial View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mrnobuddyspecial Quote  Post ReplyReply Direct Link To This Post Topic: 197x Evinrude with problems
    Posted: 07/17/2013 at 9:48pm
So we knew it had issues before we bought it. But it runs and has good compression.


I'm not sure what is usually involved in a OB tuneup. So I am apprehensive about paying the $140 quoted by Dixie Marine here in Cincinnati.

The Issue:

Starts ok
takes a little to get idling from cold
Will rev up to unknown rpm (seems close to max)
But once it is put in gear it struggles to stay going

We have run it twice and had the same result. It will idle in gear and up to (what I can only guess is) 20% throttle.
Any higher and it bogs and dies, but will restart right away after putting back in neutral.

If anyone has any experience with this motor or may know the problem, it would be greatly appreciated.
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nathan View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote nathan Quote  Post ReplyReply Direct Link To This Post Posted: 07/18/2013 at 8:33am
Rebuild the carburetors, fuel pump, and replace the plugs!! It sounds like it is staving for fuel.

also 140 doesn't seem that bad but it depends on what the say they are going to replace. yes you can get the parts cheaper but then the work starts. I would make sure what the 140 gets you.

Edited by nathan - 07/18/2013 at 8:35am
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PS-Guy View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote PS-Guy Quote  Post ReplyReply Direct Link To This Post Posted: 07/18/2013 at 10:23am
Carb rebuild for sure.  And make sure they are competent enough to check it out for air leaks as well.  A lot of these older motors have rubber parts (including intake manifolds) that can dry out and crack over time.  Too much air is not a good thing for a 2-cycle!
Feel free to contact me for help on your project!

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mrnobuddyspecial View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mrnobuddyspecial Quote  Post ReplyReply Direct Link To This Post Posted: 07/19/2013 at 9:27pm
Starving for fuel even when it runs up to full throttle in neutral? I'm not questioning... Just curious :)
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Post Options Post Options   Thanks (0) Thanks(0)   Quote nathan Quote  Post ReplyReply Direct Link To This Post Posted: 07/20/2013 at 9:51am
more load in drive then in neutral. I have had it before.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote fatdaddy Quote  Post ReplyReply Direct Link To This Post Posted: 07/28/2013 at 8:24pm
PS guy is right on the money here....Carb rebuilds is a must and really is a fairly simple job....buy a manual, seloc or whatever....buy carb kits with new floats....make sure float level is set right....clean carbs overnight in carb cleaner from local auto store....90% of these type problems are fixed with carb rebuilds...hope this helps!....buy spray can carb cleaner and blow it in every hole and orfice you can find!
Keith Winders
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mrnobuddyspecial View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mrnobuddyspecial Quote  Post ReplyReply Direct Link To This Post Posted: 07/30/2013 at 11:39pm
I got a ballpark quote from local marina of $160 to rebuild EACH carb!! That's on top of the $140 for the tuneup.

After my heart started beating again... I figured I would rebuild them myself.

Two questions, do you have to re-sync after a rebuild or is that Just if you mess with jets? And do you guys have a link to the full rebuild kit for this motor? It's. '77 70hp spark advance motor.

And I downloaded the full manual last night, if anyone wants the PDF message me. Covers a WIDE range of years and engine sizes.
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fatdaddy View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote fatdaddy Quote  Post ReplyReply Direct Link To This Post Posted: 07/31/2013 at 7:32pm
Kits are fairly cheap....probaly less than 40 bucks...I have bought several things from this site: http://bpi.ebasicpower.com/index.php ...and no you should not have to lync and sync again, pay close attention how linkage hooks up....I usually take a couple photos with my phone....there is generall a plasctic can that hits a stud to adjust butter fly opening at idle....good let us know we can help anymore...the seloc repair manual does a pretty good job on how to do this properly with pictures for us dummies...LOL....don't spend $140 bucks for someone to replace water impeller and spark plugs....might suggest changing the foot oil as well! Hope this helps!
Keith Winders
Whitesburg, GA
My 1989 SYLVAN REBUILD
24 Footer
88HP Johnson
CHILLIN' THE MOST!
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fatdaddy View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote fatdaddy Quote  Post ReplyReply Direct Link To This Post Posted: 07/31/2013 at 7:36pm
One more thing, these old motors are bullet proof and as long as there is good compression, everything else can be repaired....do you think we will be sitting around in 2056 talking about how to reapir a 2013 outboard motor....I doubt it...LOL.... there will not be any left mostly likely!
Keith Winders
Whitesburg, GA
My 1989 SYLVAN REBUILD
24 Footer
88HP Johnson
CHILLIN' THE MOST!
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