#26
IP: 24.19.226.68
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mine looks different..........
My alternator ie very different. I will take photos and
post tomorrow. Thanks very much. |
#27
IP: 24.19.226.68
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pictures of my alternator and tach
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#28
IP: 24.19.226.68
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more pictures of the alternator
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#29
IP: 24.19.226.68
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more pictures of the alternator
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#30
IP: 24.19.226.68
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My tach instruction sheet
here is my instruction sheet
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#31
IP: 104.174.83.118
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Oh Lordy, now I really feel bad over getting after you about an AC tap. I'm sure an alternator shop can do what you need but I'm not so sure I'd spend a nickel on that relic. Tachometer project aside, is there any plan to replace the alternator either now or in the future? I think that would be my primary focus with the tach installation as a side benefit.
Attached is a collage of alternator connection pictures. Of the eight shown, half of them already come with AC taps.
__________________
Neil 1977 Catalina 30 San Pedro, California prior boats 1987 Westsail 32, 1970 Catalina 22 Had my hands in a few others |
The Following 4 Users Say Thank You to ndutton For This Useful Post: | ||
#32
IP: 209.148.77.6
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Quote:
On another note, looking at your pics, I can't stress enough the importance of good proper wiring for your engine. You can get away with re-using the wiring if it's the right gauge but just make all new terminal heat shrink connections with tinned connectors and a proper heat shrink crimper. Proper grounds will reduce future issues you may face. I have had a decent amount of issues in my past with the two boats I have purchased where inadequate wiring lead to problems I could not figure out until I found out it was something as simple as changing out a wires or just re-crimping with legit wiring and/or terminals.
__________________
1971 Tartan 34C Sloop "NOVA LUNA", Rebuilt (2019) Fresh Water Cooled A4 (Bought boat in 2014) 1968 Tartan 27 Yawl "Destinada", rebuilt Old Lyme freshwater A4 (Sold boat in 2014) |
The Following 3 Users Say Thank You to southcoasting For This Useful Post: | ||
#33
IP: 24.19.226.68
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I do NOT have a motorola
Soooo...
I got a hold of a good marine alternator shop. They charge $107 per hour and he thought adding the W wire may take about an hour and a half... Hmmm.....the pretty looking hole plug concept is still in the running!! Seriously, if I want this RPM info which I have never had to be operable, my old blue alternator may become a door stop. I would most appreciate suggestions as to a new, reasonably priced alternator which definitely has the W tach wire...and HOPEFULLY could be fitted without drastic fabrication tasks needed. As far as having "good" wiring on my 1965 boat...."I'm trying". |
#34
IP: 138.207.177.95
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I would be a LOT cheaper to just wire the tach to the coil.
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#35
IP: 104.174.83.118
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. . . . . and ignore the age and condition of the alternator.
__________________
Neil 1977 Catalina 30 San Pedro, California prior boats 1987 Westsail 32, 1970 Catalina 22 Had my hands in a few others |
#36
IP: 138.207.177.95
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There is that - I would probably replace that thing on general principles, but I wouldn't pay $150 to get an AC tap on whatever that is.
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#37
IP: 24.19.226.68
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More plans on how to EASILY get my tach "working"
So....here are my two new ideas:
(so far I tried using the ground terminal of the coil as a "pulse" connected directly...and then tried with a 5k resistor in the connection....both with no luck.) 1) Tap in to the actual wire from the photosensor in my Indigoi modified distributor. The new tach I bought needs a pulse...as they show in the instructions, you may get one from adding a new sensor which senses steel gear teeth passing by. Fine. The opto-interruptor now in my distributor also gives a "pulse". This method eliminates all the alternator hacking and gives a signal unaffected by pulley sizes, slipping belts and other issues. My Indigo base unit has a red led to see the "pulses". I have a feeling that they potted the PCB so getting at that exact signal may be hard. But again....the sensor in my distributor senses a clear/blocked light path...so that is the pulse ...obviously. 2) Keep looking on Youtube and other sources about how I can personally modify my alternator to install a W wire. (geeeezus...how difficult can it be?) I am a retired engineer. |
#38
IP: 104.174.83.118
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I agree. For comparison, I can install an AC tap in a Delco 10Si alternator as a stand alone project in about 15~20 minutes. The shop's 1˝ hour estimate was either by a one armed blind guy or it's code they really don't want to work on your old blue alternator. I can't say I blame them.
Question for Dave: You said reasonably priced alternator. What's the budget?
__________________
Neil 1977 Catalina 30 San Pedro, California prior boats 1987 Westsail 32, 1970 Catalina 22 Had my hands in a few others |
#39
IP: 24.19.226.68
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New alternator very rough "budget"
Cost for a new alternator?
I dunno....roughly $100? ..... plus 8 dollars for a can of blue paint. |
#40
IP: 138.207.177.95
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Quote:
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#41
IP: 138.207.177.95
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Quote:
No association, it was the first one that popped up. |
The Following User Says Thank You to joe_db For This Useful Post: | ||
bigoledave (05-28-2022) |
#42
IP: 24.19.226.68
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used replacement...
Thanks very much...
Do we know for sure that it has the now infamous W wire?? |
#43
IP: 138.207.177.95
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That wire is not needed for the $30 tachs on Amazon nor the Isspro tach on this website
I actually don't know offhand if they have an AC tap or not. |
#44
IP: 24.19.226.68
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My tach info....again
Here is my tach which (I posted before in this thread.) The
instruction sheet clearly shows the requirement for the W tach wire. https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1 Thanks for your interest |
#45
IP: 138.207.177.95
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Quote:
Last edited by joe_db; 05-28-2022 at 08:24 PM. |
The Following User Says Thank You to joe_db For This Useful Post: | ||
bigoledave (05-29-2022) |
#46
IP: 24.19.226.68
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getting comical now..
This is getting a bit comical. Here is the response from the
closest contact I could find through amazon regarding hooking up the tach. Hi dear Dave, Thanks for your email and so sorry for any trouble. We are so sorry that we can't find your order in our store. Here is the picture to show the proof, please check the attachment to confirm it. So please contact the correct seller to solve your issue well. Because you confirmed the item, and here is the instruction of the item, you can see it and then you can know it better. And according to your meaning, you don't want to buy the speed sensor and then you want to use the item you ordered directly, is that right? If yes, we are so sorry, that item can't be done this. You should need the speed sensor and then can do it. So sorry again and hope for your kind understanding. You can also contact your correct seller to solve your issue well. Have a nice day. Regards, June Attachments: can't find 114-5895990-9684253.png ahahahaha |
#47
IP: 138.207.177.95
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These are the directions that came with my tach. They look identical to your tach. Connect it to the coil through a 5K resistor and I am 99.9% sure it will work. No one at Amazon is going to have the slightest clue.
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#48
IP: 24.19.226.68
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i did that---no luck
I have tried that ....with no luck. See my previous post about it.
I will try it one more time. thanks I was communicating with the place in China...not Amazon. Amazon gave me a link. |
#49
IP: 138.207.177.95
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Quote:
Are you sure you are on the negative side of the coil? The thing might just be dead if it does nothing. |
#50
IP: 104.174.83.118
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I'll repeat, and now considering the budget, I'd spend it on a new alternator before anything else without regard to an AC tap or 'W' terminal. Next, I'd trash this tachometer or put it in the box of shame as a lesson learned. Everyone on this forum has learned lessons the same way so welcome to the club. Finally, when you decide you really want a tachometer, if ever, give Ken a call at Moyer Marine and order a proper tachometer that is designed to connect to the coil. You'll get a quality gauge, it will be pretty much plug and play and the instructions won't be in poorly translated English. Sure, it will cost more than the Chinese cheapo you're struggling with now but in the big picture of boat ownership it's not that much.
One of Dave Neptune's prophetic rules is Do it right and cry once ($). You'll be glad you did.
__________________
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: | ||
bigoledave (05-29-2022) |
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alternator wiring, tachometer |
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