Johnson Seahorse question?!?!

pekinboy05

Cadet
Joined
May 17, 2010
Messages
14
I just bought a boat with a 70hp johnson Seahorse, mid 80's model i think. The motor hasn't been run in a year and the seller told me that i might need to empty the gas tank and put in new. Well i didn't empty the old gas out and i put in about 3 gallons to top the tank off.. I put it in the water and it started up and ran good, i took off up the lake rode a mile or so and it started bogging down and the rpms was going up and down, up and down and i could smell an old gas smell. After a few minutes of that the motor started running good again. This happened several times today... Does this sound like a Old Gas problem or a carburetor problem.... thanks...
 

Daviet

Fleet Admiral
Joined
Sep 24, 2008
Messages
8,958
Re: Johnson Seahorse question?!?!

Old stale gas can cause problems. You did add oil to the 3 gal of gas that you added didn't you?
 

pekinboy05

Cadet
Joined
May 17, 2010
Messages
14
Re: Johnson Seahorse question?!?!

Ohh yeah i added my oil, mixed 50:1 just like i do my yamaha... Does gas get stale in only a year???
 
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