Home › Forum › Ask A Member › 1957 Johnson 35hp wont stay in gear
- This topic has 22 replies, 11 voices, and was last updated 8 years, 10 months ago by
Pappy.
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March 21, 2016 at 1:48 am #33735
That shift dog does look bad. Likely the gears will be affected somewhat as well. Probably best to take it all the way apart to see what you need.
March 21, 2016 at 2:01 am #33736Yeah, you can see the corner of that lug chewed up, even through all the grimy oil.
March 21, 2016 at 12:20 pm #33745Yep, the clutch dog lugs are rounded…
You mentioned that you had a spare gearcase from a 30hp, that might be the way to handle this for now. Chances are pretty good that the lugs on the forward gear are rounded as well, so you will need both the dog and gear….This job isn’t too difficult, but resealing that case is the tricky part, you will need a pressure tester, and will probably want to replace all the seals/orings/shift rod oring as well while you have it apart…
You will also need to investigate ""why" this occurred. Usually, there is some sort of linkage problem, misadjustment that caused partial engagement of the clutch dog leading to this. Simply replacing the dog and gear may result in the new parts failing quickly if the engagement/linkage problems are not figured out and solved…March 21, 2016 at 12:59 pm #33751I believe on that model there is a slack adjustment up on the shifter handle that takes the slack out of the bell crank for tighter engagement, have sucessfully used that method with good results, but it looks like yours might be a liitle too far gone. Maybe check it after you install the new parts you need.
Send me a PM at the appropriate time and I can walk you thsu the process of adjusting that.
I will send you a PM…
Doug
March 21, 2016 at 1:29 pm #33752quote Dougs Outboards:I believe on that model there is a slack adjustment up on the shifter handle that takes the slack out of the bell crank for tighter engagement, have sucessfully used that method with good results, but it looks like yours might be a liitle too far gone. Maybe check it after you install the new parts you need.Send me a PM at the appropriate time and I can walk you thsu the process of adjusting that.
I will send you a PM…
Doug
Finally!……Way to go, Doug! Was wondering how long it was going to take for one of the folks to pick up on that and post it!
March 22, 2016 at 12:49 pm #33786quote Pappy:quote Dougs Outboards:I believe on that model there is a slack adjustment up on the shifter handle that takes the slack out of the bell crank for tighter engagement, have sucessfully used that method with good results, but it looks like yours might be a liitle too far gone. Maybe check it after you install the new parts you need.Send me a PM at the appropriate time and I can walk you thsu the process of adjusting that.
I will send you a PM…
Doug
Finally!……Way to go, Doug! Was wondering how long it was going to take for one of the folks to pick up on that and post it!
OK, a "slack adjustment"….That’s a new one on me, how’s about edumacatin the rest of us….I am surely aware of the slot on the shift handle to adjust positioning of the shift handle vs detent, but this won’t take up/solve any slop/slack problems in the linkage control systems. D
March 22, 2016 at 2:20 pm #33790"OK, a "slack adjustment"….That’s a new one on me, how’s about edumacatin the rest of us….I am surely aware of the slot on the shift handle to adjust positioning of the shift handle vs detent, but this won’t take up/solve any slop/slack problems in the linkage control systems. D"
Oh yes, it certainly will in a lot of cases tried and true.
Well, I’m no genius, and found out about this by just looking and figgerin’ on my own, it’s just common sense to me. I call it a slack adjustment, you can call it whatever you want. Happy to explain it. I have successfully loosened up the side bolt so that the shifter can be moved slightly, (the bolt can be a bugger, most of the screws I have worked on seemed to be stuck pretty good, so do not strip it out or prollems, they all seemed to be rusted, squirting it with wd or the like will help), then I open up the oval side access plate for the shift connector, (Make sure the rod is seated correctly in the connector). shifter in forward, I reach in with a pair of needle nose pliers into the access hole, grab the shift rod, wedging the pliers down, fulcruming the shift rod upwards into the extreme forward position, making sure it has as much forward contact with the gear as possible. Then I slightly move the shift handle back (just a hair, maybe 1/16", now your dog has the best chance of engaging the lugs for a tight fit totally going into gear, assuming your lugs are not too bad off) and tighten the bolt. The shifter goes ahead back into full forward, taking up that 1/16" ) it goes in gear tight, and does not seem to affect reverse as little as reverse is used. If your dogs are too bad, this is futile, It just makes sense to me that after many years of use, there has to be some slop somewhere in there, in the bell crank and possibly the shifter cradle down below, if only a little. It only takes a little slop to have problems. I have done this on many motors with success, perhaps it will work for you too. And of course when you put it in gear, rpm’s way down, shift it in gear fast, not slow, don’t baby it into gear, it will cause more wear on the steel parts. Thanks for asking.
Pappy: Thank you for the kind words, I feel all warm and fuzzy inside now, Ha!
March 22, 2016 at 4:20 pm #33793OK, guess it was the term "slack adjustment" that confused me. I thought this was the adjustment you were referring to. Very important adjustment indeed, but keep in mind it can not resolve sloppy linkage problems. I understand what you are saying, making sure the lugs are fully engaged in forward gear. But, if there is too much slop in the linkage, you will end up with only partial/no engagement in reverse and the lugs may not disengage enough when shifted into neutral.
You are absolutely right, this adjustment should be checked often, especially after reinstalling the gearcase.March 22, 2016 at 4:33 pm #33794Great info in this thread Guys. I’m going to save it for future reference. Thanks!
March 22, 2016 at 9:59 pm #33799When I adjust my motors, I always just slightly favour forward gear on the shift handle.
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