Re: 1976 Evinrude 15 hp 15604A Fuel pump?

[Don]

Again, the 74-76 OMC 9.9/15s were not OMCs best efforts, even though the powerheads and gearcases are very durable. If you are working on this engine for a customer/friend, you might want to limit your exposure to it, or you could end up "being married to it". I’m not saying they can not be made to run satisfactorily, but the learning curve is stiff, especially with the ignition system. Needless to say, if the engine has poor/weak spark, you may be stuck getting involved. But, if both cylinders will jump the 5/16" air gap while cranking, you may not want to get involved further.