jmendoza
Petty Officer 1st Class
- Joined
- Jun 9, 2008
- Messages
- 314
Re: 1975 evinrude 9.9 fuel pump prob?
Most of us here are spoiled by CDI/electronic ignition and take it for granted that if you have spark, it's fine, and that is correct.....for electronic ignition.
But, and I say this for those who are new to engines, points are a different animal althogether, and even though you can get spark, and the engine runs, it will not be optimum unless they are carefull set and checked against the timing marks. Failure to do so results in poor engine performance, possible detonation under high loads, and poor fuel economy.
Therefore, it is critical to get points perfectly set on the mark.
On twins, it is even more critical because it affects the balance of the power impuses which are traveling through all the moving parts, and can cause at a minimum poor performance, moderate vibration, and if really out of synch, it can wear out and break things eventually.
So, spend the extra time up front, and be rewarded with many hours of trouble free operation. Points rarely fail, the weakest link is the newer condensors (asian mfg) which are inferior to ones made before about 1985(USA). Coils almost are indestructable, and in my experience I have never been stranded with my 1975 9.9 due to an ignition problem. 1977 and on 9.9/15 engines cannot match that reputation because they have a nasty habit of blowing out the power pack ignition. I'll take the points, especially when I'm 15 miles offshore, thank you!
Most of us here are spoiled by CDI/electronic ignition and take it for granted that if you have spark, it's fine, and that is correct.....for electronic ignition.
But, and I say this for those who are new to engines, points are a different animal althogether, and even though you can get spark, and the engine runs, it will not be optimum unless they are carefull set and checked against the timing marks. Failure to do so results in poor engine performance, possible detonation under high loads, and poor fuel economy.
Therefore, it is critical to get points perfectly set on the mark.
On twins, it is even more critical because it affects the balance of the power impuses which are traveling through all the moving parts, and can cause at a minimum poor performance, moderate vibration, and if really out of synch, it can wear out and break things eventually.
So, spend the extra time up front, and be rewarded with many hours of trouble free operation. Points rarely fail, the weakest link is the newer condensors (asian mfg) which are inferior to ones made before about 1985(USA). Coils almost are indestructable, and in my experience I have never been stranded with my 1975 9.9 due to an ignition problem. 1977 and on 9.9/15 engines cannot match that reputation because they have a nasty habit of blowing out the power pack ignition. I'll take the points, especially when I'm 15 miles offshore, thank you!
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