Johnson TD-20 air cooled or not?

[whomeno]

Hi,<br />I just got a TD-20.It runs fine ,I was woundering if this is an air cooled outboard or a water cooled.searched through the foum with no luck.Any info on this johson would be very helpfull.<br />Thanks

 

[JB]

Re: Johnson TD-20 air cooled or not?

One of the best WATER COOLED outboards ever made, provided it is well cared for.<br /><br />A Service Manual will tell you how to care for it.<br /><br />Good luck.

 

[whomeno]

Re: Johnson TD-20 air cooled or not?

thanks for the fast reply. I'm new to outboards,how can I tell if it is cooling ok?<br />I've looked at other posts about carb kits,has anyone found kits for these yet?<br />Thanks

 

[CFronzek]

Re: Johnson TD-20 air cooled or not?

It's a 5 hp from 1946-1949. It's old enough to require more difficult part searches and possibly part substitutions. The one thing that has to work is the WATERPUMP. It has a molded rubber impeller that goes to hell with age. It's located right behind the propeller (if my manual is correct).

 

[CFronzek]

Re: Johnson TD-20 air cooled or not?

Duplicate post.

 

[Scaaty]

Re: Johnson TD-20 air cooled or not?

Keep an eye on ebay...I have parts that will be up for auction come winter. I have them all away for the summer.......

 

[WillyBWright]

Re: Johnson TD-20 air cooled or not?

The water pump has what's called a Rotor that oscillates from an eccentric on the propshaft. It's a terribly inefficient pump, but quite durable. But they do wear out and they're very hard to find. The hole in the middle enlarges. I put a plastic bushing in one and it seemed to work again. There should be a fine mist coming out of the back near the waterline.<br /><br />The other tough find is the float in the carb. It's just cork. I went to St. Vinnies and bought a bottle with a large enough cork to carve down and shellac. Worked fine.

 

[OBJ]

Re: Johnson TD-20 air cooled or not?

Another idea on the float, Merc carbs with the side float chambers which look like the float bowl on the your 5horse, use a float that will fit yours. The hole through the middle just needs reamed out a very tiny bit. I've done this twice with these five horses....worked good.