This is for a friend's '89 Starcraft 18SS repowered with Optimax 115 w/ Merc Laser II 19P prop.
I'm trying to hook up a tachometer (Teleflex). I believe everything is good, just want to make sure. I'm coming off the control box using the purple switched ignition for power, the gray for the feed, and the black for ground.
My first question is "what number of alternator poles do I set on the back of the gauge?"
I set them to 6 (which I guess means 12/2=6, b/c the doc says it is divided by 2) and it appears to work OK. I say OK b/c the idle appears to be at about the correct speed ~700 rpm. I didn't try anything other than the 6 setting b/c it seemed to work OK.
I'm troubleshooting a prop situation and I want to make sure that the tach is working properly. I'm second guessing now though b/c I'm only getting to 4500 rpm at WOT. I'll post the specific prop question in the prop forum.
Second, "what is the nut size on the prop for the Opti 115?" The same as Alpha's 1 1/16 ?
Thanks,
Gary
I'm trying to hook up a tachometer (Teleflex). I believe everything is good, just want to make sure. I'm coming off the control box using the purple switched ignition for power, the gray for the feed, and the black for ground.
My first question is "what number of alternator poles do I set on the back of the gauge?"
I set them to 6 (which I guess means 12/2=6, b/c the doc says it is divided by 2) and it appears to work OK. I say OK b/c the idle appears to be at about the correct speed ~700 rpm. I didn't try anything other than the 6 setting b/c it seemed to work OK.
I'm troubleshooting a prop situation and I want to make sure that the tach is working properly. I'm second guessing now though b/c I'm only getting to 4500 rpm at WOT. I'll post the specific prop question in the prop forum.
Second, "what is the nut size on the prop for the Opti 115?" The same as Alpha's 1 1/16 ?
Thanks,
Gary
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