TD20 SeaHorse Only runs if I keep pumping the primer

[freakit]

I have a TD20 Johnson Seahorse. When I pull the starting cord nothing happens. It pulls freely. Theres 3 pieces of metal on top that move out and inward. 2 of them are missing the springs. So I took off the pull start and got out my 18volt dewalt and put a 3/4" socket on it and start the motor with it.

I have the side cover off the engine so I can see the carb. I pump the primer and see a mist spray out the back from a port that has a copper tube on it that goes to the carb. The primer button doesnt get hard no many how many times I pump it. I move the lever to start and hit the drill trigger. The engine will fire up after a second or 2 of spinning. The engine will run for 2 seconds until it uses up the fuel I pumped in with the primer. After a few times I tried pumping the primer after I got it to fire up. As long as I keep pumping the primer the engine will stay running. If I stop pressing the primer it shuts off. I tried moving the lever from start to fast and same results.

Any ideas on what to look for?

 

[HighTrim]

Re: TD20 SeaHorse Only runs if I keep pumping the primer

First of all, I would NOT try to start your motor like that. All you are doing is overtorqing the flywheel, eventually leading to a sheared key.

Fix the recoil.

Carb needs a cleaning and rebuild. This will help.

http://www.pochefamily.org/outboard/CarbService.html

 

[freakit]

Re: TD20 SeaHorse Only runs if I keep pumping the primer

Thanks for the help. Ill take the carb apart tonight. Hopefully my cork float is ok. I tried looking for a rebuild kit online but read a post where it said they dont exist. This is all new to me.

Any idea what the part is called that sits on top of the flywheel? It has 3 pieces of metal that move outward. Im missing 2 of the 3 springs and the third is falling apart.

I really appreciate the help because im a total rookie at this small engine stuff but hope to learn. Think i came to the right place for help and knowledge.

 

[bonzoscott]

Re: TD20 SeaHorse Only runs if I keep pumping the primer

You can get those springs at Ace Hardware and others...

 

[freakit]

Re: TD20 SeaHorse Only runs if I keep pumping the primer

Thanks for the reply. Hopefully thats my problem.

 

[ballsout]

Re: TD20 SeaHorse Only runs if I keep pumping the primer

does this motor use a fuel pump or a pressurized tank? if it has a pump it sounds like its not working if it runs while pumping gas into it.

 

[HighTrim]

Re: TD20 SeaHorse Only runs if I keep pumping the primer

It uses neither.

Gravity fed tank.

 

[freakit]

Re: TD20 SeaHorse Only runs if I keep pumping the primer

No luck at Ace Hardware. I went to 2 different stores plus a Sears and none of them had the springs. Have you bought them from Ace before? Do you have a part number or SKU?

I took apart the carb and the float was rough. The coating was flaking off and it was kind of brittle. I read the guide and it mentions a replacement for a Mercury thats plastic. I'll order the float if I can find these springs.

 

[bonzoscott]

Re: TD20 SeaHorse Only runs if I keep pumping the primer

No I don't have SKU. I'd have to run back up there to find out but my store had what looked like the same spring. Maybe measure it and look online. The Float: I'm sure somebody can post the link, but you have to sand it down and coat it in "RC airplane dope". or buy a large cork from Ace and grind varnish it. I Doped mine and it works fine. That airplane dope is something else... fuel resistant..

 

[freakit]

Re: TD20 SeaHorse Only runs if I keep pumping the primer

I'll have to find a pic of a good one. Mine is totally roached. Maybe thats why I couldnt find one. It doesnt even look like a spring anymore. Looks more like a thin piece of mig welding wire coiled and twisted.

 

[freakit]

Re: TD20 SeaHorse Only runs if I keep pumping the primer

I cleaned the carb and used the airplane dope on the cork float. I then drained the fuel out of the tank and it fired right up. Now I need to adjust the carb because it was popping a little. Its 95 degrees outside so I didnt stay out too long.

I put the prop in a bucket of water while it was running. I noticed a little water spraying out of a 90 degree elbow where Im guessing water runs through to cool the engine. I looked at the elbow and I noticed a little hole in it. Looks like a drilled hole. Not sure if its suppose to do this or if it needs to be replaced.

After getting the carb adjusted the only other thing I need to do is find the 3 springs. I got 3 from Home Depot and tried to modify them myself and 2 of the 3 fell off. Worked for 1 pull and that was it. I'm not giving up yet. I might have to get spring wire and coil up a spring myself. The sites I found with parts go back to the mid 60's. I'm still looking. Any sites you recommend to find these springs?

 

[AlTn]

Re: TD20 SeaHorse Only runs if I keep pumping the primer

maybe marineengine.com

 

[freakit]

Re: TD20 SeaHorse Only runs if I keep pumping the primer

Ill give them a call. Thanks

Anyone know if this td20 has reverse and if it does how to switch to reverse?

 

[nwcove]

Re: TD20 SeaHorse Only runs if I keep pumping the primer

why yes it has reverse!!! spin it 180 deg.....thats reverse.

 

[freakit]

Re: TD20 SeaHorse Only runs if I keep pumping the primer

Haha. Didnt think of that. My electric troller has forward and reverse. Never thought about spinning it. Duh.

Thanks