oldslowandugly
Petty Officer 3rd Class
- Joined
- May 12, 2010
- Messages
- 98
Last year I launched a 1985 Whaler 15 foot Sport, with a 1993 Evinrude 48spl. No problems at all. This year it tested great in a barrel so I launch again. Works fine so I go fishing the next day and the tach is suddenly idling at 3000 rpm and going off the scale at WOT, very odd since the prop usually holds rpms at 5100. So I research and find it probably could be the rectifier, but also the stator, battery, connections, pulse switch, lots of things. I take my multimeter and begin testing and it all checks out OK. Charging is great, but tach is wacky still. So I had a spare brand new rectifier and I figure what the heck and swap it in. FIXED! Retest the old rectifier and it still checks out OK. The only thing that may be amiss is I read that the red wire should show a lower value than the yellow wires. This one had a higher value, but all the diodes were functioning properly, no shorts to ground, no opens. Could that be it, and why? I am so confused.