Relocation of shifter on small outboard

Wee Hooker

Chief Petty Officer
Joined
Sep 11, 2005
Messages
618
Most older/2 stroke tiller steer "portable" outboards were designed to have their gear shift on the starboard side about 1/2 way back. This is a fine setup IF your running controls but if you tiller steer, your always reaching back and fumbling for that small lever. This PITA design feature recently came to a head when I mounted my 92' 5 Hp Tohatsu (Nissan/Merc) on the narrow transom of a old town DS 17 square stern canoe. Not only was the transom of this boat narrow, it was a good bit behind the seat. This magnified the shifting problem due to limited reach and ability to move around. It might even be dangerous in moving water.
So with a bit of engineering reason, some basic hand tools and $12 worth of supplies from Home Depot, I extended the shift linkage from the side of the Tohatsu , to about 5" in front of it.
What your looking at is a 12", 5/16-18 threaded rod covered in heat shrink tubing with a 3/16x1 1/2" eye bolt captured (loosely) between lock nuts on one end while the other floats in a identical eye bolt without restraint. The rear/captured eye bolt goes through the shift lever and is nylock nutted on the back side. The front/floating eye bolt is supported through a 3/4"x9" piece of bent aluminum bar stock that is screwed through the motors carry handle. ( Note no mods made to the motor at all. It all just bolts on through existing holes.)) The knob (which was just something I had laying around) is epoxied to the rod. The whole effort took about an 1 1/2 hours and used no special tooling beyond a hand drill, hack saw and some wrench's (with 1/2 of that time thinking and fitting).

I have to say, it came out pretty decent and works AWSOME! The knob is right by the tiller hand and it's easy to visually see it's position at any time. It exhibits very little slop and a good positive feel when shifting. No issues with the rod vibrating (even while ideling on this one lunger.) NO more reaching and fumbeling over the transom! I should have done this years ago!! Can't wait to get this done on my 6 hp Johnson now!

Hope this inspires somebody else to do the same.

Tohatsushiftmod002.jpg


Tohatsushiftmod003.jpg


Tohatsushiftmod006.jpg
 

F_R

Supreme Mariner
Joined
Jul 7, 2006
Messages
28,226
Re: Relocation of shifter on small outboard

Nice creativity.
 

Wee Hooker

Chief Petty Officer
Joined
Sep 11, 2005
Messages
618
Re: Relocation of shifter on small outboard

Thanks, Since getting into management, I don't get a chance to use my ME degree much. THis was a fun project once the light went on in my head!
 

SteveRoss

Petty Officer 2nd Class
Joined
Jun 14, 2010
Messages
108
Re: Relocation of shifter on small outboard

Another ME in Management ??? Looks like Wee Hooker has done a fantastic job !!

Regards.


Steve
 

Rudi2

Petty Officer 2nd Class
Joined
Aug 9, 2003
Messages
130
Re: Relocation of shifter on small outboard

Thanks, Since getting into management, I don't get a chance to use my ME degree much. THis was a fun project once the light went on in my head!

Another management type, and with lights in his head too! Just kidding, looks like it'll do the job. :)
 

JimS123

Fleet Admiral
Joined
Jul 27, 2007
Messages
8,234
Re: Relocation of shifter on small outboard

Back in the 1970's OMC had an accessory gearshift adaptor that basically did the same thing. It had a side linkage so that it mounted right on the tiller handle.
 

Wee Hooker

Chief Petty Officer
Joined
Sep 11, 2005
Messages
618
Re: Relocation of shifter on small outboard

Back in the 1970's OMC had an accessory gearshift adaptor that basically did the same thing. It had a side linkage so that it mounted right on the tiller handle.

Now that would be nice! I'd love to see a pic of that. ( My favorite outboards of all time were the 1990's-early 2000's Merc fishing/portable series that had the shift right in the throttle grip. True one hand operation! Not sure why they never caught on. ) I was thinking of ways to bring the control to the throttle arm, but the complexity goes up like 10x. This is the next best thing and follows the KISS principle :).
 

Home Cookin'

Fleet Admiral
Joined
May 26, 2009
Messages
9,715
Re: Relocation of shifter on small outboard

thre are some OMC's that put the shifter more to center--a big black handle. A step inthe right direction.
 
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