1961 johnson Seahorse running problems

[boonejohnson]

I have a 1961 5.5 hp Johnson Seahorse that i have been working on for a while now. I finally have it to where it will start up and run but after about a minute it just dies out and stops. even when the motor is actually running it doesnt sound like its running very strong. does anyone have any ideas or suggestions as to what the problem might be?

 

[Daviet]

Re: 1961 johnson Seahorse running problems

Start with the basics, compression, spark and fuel delivery.

 

[Vic.S]

Re: 1961 johnson Seahorse running problems

Checked compressions? checked for two good sparks? Replaced plugs?

Ignition or compression problem could account for "even when the motor is actually running it doesnt sound like its running very strong." maybe only running on one cylinder. Check by pulling plug leads one at a time.

It does sound as though you have a fuel flow problem. Fuel pump pumping OK? Pumping the fuel line bulb will help if the pump is defective.

Carb problem? Float and needle valve ok? All jets and passages clean? Both mixture needles correctly adjusted?

Does choking it a bit help? If so suspect partially blocked jet.

 

[boonejohnson]

Re: 1961 johnson Seahorse running problems

ok thanks ill try this stuff and get back to yall.

 

[boonejohnson]

Re: 1961 johnson Seahorse running problems

ok it is now running strong and for as long as i want it to however, it seems to be smoking excessively but it isn't running hot. could this be due to a higher than normal oil to gas ratio?

 

[Vic.S]

Re: 1961 johnson Seahorse running problems

A 1961 model should be running on 24:1 mix.

It'll smoke more than a model running on 50:1.
Correct adjustment of the carb needles may help to minimise it.
See HERE

A synthetic oil may smoke less.

 

[boonejohnson]

Re: 1961 johnson Seahorse running problems

ok thanks ill try that

 

[boonejohnson]

Re: 1961 johnson Seahorse running problems

ok so i am now away at school and dont have access to the motor to work on it...what is the proper method for draining the fuel so as to insure that it doesnt get all gummed up during the time that i am not working or maintaining it?