Classic AquaSport
Aquasport Mechanicals - things that need a wrench, screwdriver or multimeter => Engines & engine woes => Topic started by: mopargreg on April 14, 2008, 07:52:14 PM
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This weekend my tach started not working on accell, when I bring the boat down to idle, most of the time, it works then when it starts to get over about 1500rpm it drops to 0, motor runs great , all electronics seem to be work good, but my volt meter reads about 10.5-12 volts but NEVER over 12, can the voltage regulator cause this problem on a 1990 150 Johnson? All my gauges are new Teleflex and I rechecked all the wiring.... My main concern is the tach, of course I don't want a dead battery either but it seems to be OK....
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The tach on many 2 strokes reads off the stator. If you are getting no reading, you probably are not charging - interesting that the motor would not also be missing or performing badly...
Could be a rectifier or voltage regulator; your voltage should be over 13 volts when the engine is running and the battery is charged.
Hope this helps - good luck!
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My '93 225 Johnson was doing the same thing and it was the regulator. It depends on battery condition and load but I made several trips before it got so low it would not start.