June 9, 2021 at 4:11 pm #239816
I just picked up a Johnson TN last night. If I try to spin the prop, it has zero movement but I can feel just a hair of movement (like a gnat hair) grasping the flywheel. It was the seller’s Dad’s and he knew nothing about it. Is there anything with the neutral clutch that could lock it up? Just curious if there are any “high flyers” to check out first on these motors?
Thank you.June 9, 2021 at 5:44 pm #239826
dropping te GC gets complicated cause you need to disconnect the neutral cable… try popping the fw as a starting point cause you need to inspect the coils anyway (likely all cracked)
you will need an impeller so dropping the GC can come later anyway and… maybe the clutch is broken diagram TN GC1 ..
. and this will tell you if the blockage is above …or below in the GC 🙂
shoot some wd40 in the cylinders just is case but stuck rings would probably stop ANY movement worth a try
next could be the cyl. head to inspect the cyl walls and pistons
after the mechanics are fixed comes the carb …
is it a TN 26 -27 ???
Joining AOMCI has priviledges 🙂
- This reply was modified 4 days, 23 hours ago by crosbyman.
US Member - 1 Year
Topics: 796June 9, 2021 at 5:58 pm #239828
It wouldn’t take long to remove the prop and cap off the gear case
to see if it’s full of rust instead of grease.
Prepare to be boarded!June 9, 2021 at 7:45 pm #239834
It’s a TN25. Thank you, as soon as I have some time I am going to dive in on it.June 9, 2021 at 9:20 pm #239855
Crosbyman, Thank you!, those will help!June 10, 2021 at 7:22 am #239873
as a aomci member you would have access to download the 400 or so pages of the johnson repair manul covering oldies… from your TN td and up to late 50s
it is in the MEMBERS ONLY section under INNER SANCTUM…LIBRARY…Garry Spencer’S drop box…. down the file is a RED BOOK…. where the pictures provided come from 🙂
Joining AOMCI has priviledges 🙂June 10, 2021 at 6:31 pm #239928
Yes, I have realized joining is a must do and will be shortly. Thank you again.June 10, 2021 at 10:32 pm #239948
I am now a member : )June 11, 2021 at 7:29 am #239957
Super, thanks for joining… happy downloading !
store the red book on your PC as a PDF file and…if you prefer copy it on a USB key and have a local print shop print it out and put a spring binder for easy. .flat reading .
top and bottom with a plastic sheet to protect your new book 🙂
Joining AOMCI has priviledges 🙂June 12, 2021 at 3:44 pm #240083
I dug out my bore scope to check the cylinders. Sand on the cylinder head wasn’t a good first sign. I don’t know, but this one may have went for a swim.
Here’s a couple pictures with the scope. Top picture is lower cylinder, 2nd picture is top cylinder, looks a little crusty in there. Going to start soaking with wd-40.
Any input would be appreciated.
US Member - 1 Year
Topics: 796June 12, 2021 at 6:57 pm #240095
My personal thoughts would be that there’s plenty of TN’s “out there”, and you might be better off
using yours for parts for one that’s not froze up. Life is too short to fight with a frozen TN.
A rare outboard is another mater.
That said, it’s good experience / practice working on frozen ones, and sometimes a guy
can salvage them if not froze too bad.
Prepare to be boarded!
- You must be logged in to reply to this topic.