I acquired a 1952 Johnson TN-28

Kris.J

Seaman
Joined
Aug 8, 2012
Messages
66
Re: I acquired a 1952 Johnson TN-28

It's all back together & running well in a barrel. Thanks all for your advice!
 

Kris.J

Seaman
Joined
Aug 8, 2012
Messages
66
Re: I acquired a 1952 Johnson TN-28

Alright, I've read some conflicting things about high-speed & low-speed needles.
My motor starts up great and runs in the barrel with the throttle at the START position - but sneezes and dies when I try to move the throttle to SLOW.

Which is which?
I believe the needle with the large dial on top is the high-speed? Then the L-shaped needle on the front of the engine block is the low-speed?
Do I have this right?

Thanks!
 

1946Zephyr

Vice Admiral
Joined
Oct 21, 2008
Messages
5,556
Re: I acquired a 1952 Johnson TN-28

Nice to meet you Chris,will keep you in mind if I decide to go further with this motor ,its a TN 26 that I have ,the stater ,tank, magnetto missing

The TN-26 will have a completely different mag assembly as the 27 and 28, so be sure of your model number.
 

nwcove

Admiral
Joined
May 16, 2011
Messages
6,293
Re: I acquired a 1952 Johnson TN-28

yes you are correct, the L shaped needle is the low speed . generic setting should be 3/4 turn out from lightly seated. ( they can be very sensitive, so make small adjustments and give it a few seconds to react)
 

1946Zephyr

Vice Admiral
Joined
Oct 21, 2008
Messages
5,556
Re: I acquired a 1952 Johnson TN-28

A good starting point for the low speed, is 5/8 turn out.
 

Kris.J

Seaman
Joined
Aug 8, 2012
Messages
66
Re: I acquired a 1952 Johnson TN-28

OK back in the barrel tonight. I took a break last night.

Thanks cove & Zeph!
 

HighTrim

Supreme Mariner
Joined
Jun 21, 2007
Messages
10,486
Re: I acquired a 1952 Johnson TN-28

Yea as both stated, 3/4 turn out is the starting point for adjustment, but usually, if not always, find that the TN ends up being about 5/8 of a turn out by the time Im done.

If it is still lean sneezing we will have to dig deeper
 
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