Question about 76 9.9 Johnson

[shogle]

I have a 9.9 Horsepower 1976 Johnson<br /><br />Model 10R76R<br />SN e4382618<br /><br />Orginally the problem I was having was it would fire up everytime run good at WOT for 5 min or so then it would sputter down, If I turned down the throttle and brought it back up it would work good for a min or so then back to sputtering and losing RPM. So I put new plugs in (champion #7) the same kind it had and now I cannot even get it to start????? I however dont know what the gap should be, could spark gap be casing it not to start? And once I get it started what could be causing the loss in RPM after a few min?<br /><br />Any advice will be great!!<br /><br />Thanks in advance<br />Scott

 

[russeller]

Re: Question about 76 9.9 Johnson

that on the plugs should be .030

 

[Solittle]

Re: Question about 76 9.9 Johnson

Welcome - What you describe can be the result of a number of problems and the one that come first to my mind is overheating. When did you last replace the water pump?Check that out as well as messing with the plugs.<br /><br />Those are great motors. I have a 1975.

 

[shogle]

Re: Question about 76 9.9 Johnson

Thank you very much for the reply<br /><br />I just purchased the motor about 2 weeks ago, So I dont really know the history. Where can I buy a water pump? <br /><br />Thanks Again<br /><br />Scott

 

[knobby]

Re: Question about 76 9.9 Johnson

could have you a float problem in the carb. Maybe a carb kit from your dealer, one with the new float.

 

[NathanY]

Re: Question about 76 9.9 Johnson

Get your water pump here<br /><br /> http://www.iboats.com/mall/index.cg...tegory=engine part>impeller&*******=479484125