#1
IP: 209.240.120.168
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Tachometer help
Hey everyone,
Today I installed new tach i ordered from Moyer and had it working fine though a bit jumpy especially at idle. I've wired it according to the instructions as well as chatting with Don last week, white wire is to negative side of coil, black to ground, red and green to ignition switched power. Next i installed new electronic ignition. Black to negative red to positive and now tach is not working. Its intermittently jumping between 0 and 500. Wondering what a possible solution might be? I'd like to time the engine using Thatcth and ndutton method, but really want the tach to be working... Thanks Trevor
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Trevor Kenopic 1974 C&C 30 Windmagic Collingwood, Ontario |
#2
IP: 32.211.28.40
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Trevor,
My first thought is that you're dealing with corroded wiring and poor connections. Don't know your boat, but is there by chance one of those trailer connectors in there somewhere? If you wires aren't green and the connections are good, I'll have to rethink. But that's my first guess. |
#3
IP: 209.240.120.168
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Thanks Al, no all the wiring is brand new, and I've double checked connections. It was working fine with the old points, but not now that the EI is installed...
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Trevor Kenopic 1974 C&C 30 Windmagic Collingwood, Ontario |
#4
IP: 24.152.132.140
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Give this a read and see if it helps. You'll need to follow the links too.
http://support.pertronix.com/kb/faq.php?id=34
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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 |
The Following User Says Thank You to ndutton For This Useful Post: | ||
Tkenopic (05-27-2019) |
#5
IP: 205.211.96.102
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Thanks Neil,
I did see that, though I was hoping someone here had experience with the issue. I was surprised that Petronix didn't have a more 'formal' fix. Some of those solutions look like trial and error, or a bit of a shot in the dark. I'll call Moyer this week and see if I can get some help there and report back.
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Trevor Kenopic 1974 C&C 30 Windmagic Collingwood, Ontario |
#6
IP: 24.152.132.140
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I suggest giving their diode remedy a try. Diodes are cheap.
__________________
Neil 1977 Catalina 30 San Pedro, California prior boats 1987 Westsail 32, 1970 Catalina 22 Had my hands in a few others |
The Following User Says Thank You to ndutton For This Useful Post: | ||
Tkenopic (05-27-2019) |
#7
IP: 205.211.96.102
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Canadian Electronics Supply
Anyone in Canada, specifically Ontario have any luck ordering electronics supplies?
Specifically right now I'm trying to track down 10K ohm 1/2 watt resistor. I've tried The Source, Canadian Tire, Ideal Supply, NAPA without any luck. thanks, trevor
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Trevor Kenopic 1974 C&C 30 Windmagic Collingwood, Ontario |
#8
IP: 67.201.160.41
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Trevor,
I see you are in Collingewood. There is a place called Electronsonics in Markham. Website HTTPS://www.e-sonic.com They have all sorts of electronics stuff. Bob McD |
The Following User Says Thank You to BobMcD For This Useful Post: | ||
Tkenopic (06-05-2019) |
#9
IP: 24.152.132.140
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Mouser Electronics has a Canadian presence. Here is a 3 watt, 10K Ω resistor:
https://www.mouser.ca/ProductDetail/...POODbrVQ%3D%3D
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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 |
The Following User Says Thank You to ndutton For This Useful Post: | ||
Tkenopic (06-05-2019) |
#10
IP: 205.211.96.102
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Thanks for the ideas guys. Nick, being new to this kind of thing, I'm wondering if wattage matters here? The petronix fix suggests 1/2 watt, that one is 3 watt, does that matter?
The resistor is going to be plan B now. Don has received a 'filtering harness' to 'remedy oscillations' from ISSPRO. He's sending that in the mail and I'll wire it up according to the instructions and report back about the progress. Thanks, Trevor
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Trevor Kenopic 1974 C&C 30 Windmagic Collingwood, Ontario |
#11
IP: 138.207.175.58
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Is this a "one-off" problem or has it been experienced/replicated by others?
Bill |
#12
IP: 24.152.132.140
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The wattage specification is a minimum. If the recommended resistor is 1/2 watt, a 3 watt resistor has capacity to spare.
I have a Plan 'C' for you: Go to an alternator driven tach like the diesels use. That's the type I've always had with no problems.
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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 Last edited by ndutton; 06-05-2019 at 05:21 PM. |
The Following User Says Thank You to ndutton For This Useful Post: | ||
Tkenopic (06-07-2019) |
#13
IP: 138.207.175.58
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Quote:
Bill |
#14
IP: 24.152.132.140
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Based solely on the dialog here I think it is a known problem and the entities involved are keeping it quiet. I wouldn't think ISSPRO and Pertronics would have remedies available if it hadn't come up before.
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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 |
#15
IP: 138.207.175.58
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So Isspro is providing the alleged solution? I thought it was Pertronix who had the mushy explanation and the mushy fix?
Bill |
#16
IP: 24.152.132.140
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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.
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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 |
#17
IP: 24.152.132.140
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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 #12 I offered a sure solution independent of both.
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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 |
#18
IP: 205.211.96.101
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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...
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Trevor Kenopic 1974 C&C 30 Windmagic Collingwood, Ontario |
#19
IP: 67.175.33.159
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Re post #12, "Plan C" Alternator Tach
Can the ISSPRO alternator Moyer supplies be connected to the alternator?
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#20
IP: 24.152.132.140
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Quote:
Ignition input tachometers have a switch on the back to select the number of cylinders.
__________________
Neil 1977 Catalina 30 San Pedro, California prior boats 1987 Westsail 32, 1970 Catalina 22 Had my hands in a few others |
The Following User Says Thank You to ndutton For This Useful Post: | ||
HOTFLASH (06-10-2019) |
#21
IP: 142.46.69.232
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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.
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Trevor Kenopic 1974 C&C 30 Windmagic Collingwood, Ontario |
#22
IP: 138.207.175.58
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Simply a bad tach (Occam's Razor at work) or something more complicated than that?
Bill |
#23
IP: 142.46.69.232
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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, Ontario |
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