Mercury 1970 9.8

[Blakenab]

I got a boat from my boss he got it from a family member and never used the motor was in he’s garage for 5 year and ran before he put it in there but I tried to start it and it will run only if the throttle it wide open and if u try to turn the throttle down it’s dies right away and idk what’s wrong with it is the carb or like fuel line it’s is a 1970 mercury 9.8 110

 

[Scott Danforth]

welcome aboard

if it sat for 5 years, you will need to go thru the carb as well as replace the impeller

fuel goes bad in about 6 months, after 5 years, what was left in the carb has long since turned to gunk.

 

[The Force power]

Remove the carburetor and remove bowl,
Spray Carb-cleaner in every orifice you see and blow through with compressed air.
(also remember the air/fuel screw's position when removing for cleaning)

Put it back on and see if it's better...if not it may need a Carb-kit.
To set the air/fuel mix screw; screw in all the way very GENTLY then back-out 1 1/2 turn to start with...you may have to turn in clockwise a bit

 

[The Force power]

I forgot to say;

Find as much info on Carburetors & cleaning them as possible if not familiar with the process