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Post #10 mentions the ISSPRO "filtering harness" sent to MMI and on its way to Trevor.
In post #4 I mentioned a Pertronix solution found on the internet.
In post #4 I mentioned a Pertronix solution found on the internet.
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Neil
1977 Catalina 30
San Pedro, California
prior boats 1987 Westsail 32, 1970 Catalina 22
Had my hands in a few others -
Post #10 mentions the ISSPRO "filtering harness" sent to MMI and on its way to Trevor. In post #4 I mentioned a Pertronix solution found on the internet. In post #12 I offered a sure solution independent of both.Neil
1977 Catalina 30
San Pedro, California
prior boats 1987 Westsail 32, 1970 Catalina 22
Had my hands in a few othersComment
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Not sure. Tracking the package and looks like it's in customs so I won't get it in this weekend. I'll let you know once it's in, how it's working...Originally posted by Administrator View Post
Trevor Kenopic
1974 C&C 30
Windmagic
Collingwood, OntarioComment
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Re post #12, "Plan C" Alternator Tach
Can the ISSPRO alternator Moyer supplies be connected to the alternator?Comment
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I haven't seen the MMI ISSPRO tach but I think the answer to your question is probably not. Tachometers come in a few varieties of input signal: ignition pulses, alternator AC tap or an engine mounted driver and one does not cross over to another. I can't say for the driver type but the other two are typically labeled as to their input. Here is a picture of mine (alternator input) showing the label. Note that with an alternator input the tach must be calibrated to account for different pulley ratios. I just replaced my alternator and the new one has a smaller pulley so a calibration exercise had to be performed. Took about 10 minutes.Can the ISSPRO alternator Moyer supplies be connected to the alternator?
Ignition input tachometers have a switch on the back to select the number of cylinders.Attached FilesNeil
1977 Catalina 30
San Pedro, California
prior boats 1987 Westsail 32, 1970 Catalina 22
Had my hands in a few othersComment
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Finally got back to the boat and got the new tach installed. It works! No filtering harness, diodes, or doo-hickies required. Must have been defective all along.
Thanks for the suggestions and to Don for sending the new one.
Trevor Kenopic
1974 C&C 30
Windmagic
Collingwood, OntarioComment
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Simply a bad tach (Occam's Razor at work) or something more complicated than that?
BillComment
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No nothing complicated, just the bad tach. I simply installed the new one, same way i did the first one and it worked.
Trevor Kenopic
1974 C&C 30
Windmagic
Collingwood, OntarioComment
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