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Go Back   SailNet Community > On Board > Gear & Maintenance > Engines > Diesel
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Diesel This is a forum dedicated to diesel engines and their applicable accessories.


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Old 12-24-2009
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desiel tach: Tiny-tach

The previous owner of my sailboat replaced the console Yanmar tach with a fuel gauge. He claims that the tach did not work(due to unknown reasons). The Yanmar replacement tach gauge goes for $180, but replacing it will not guarantee a working tach.

I have come across Tiny-Tach desiel (http://www.tinytach.com/tinytach/diesel.php). It works by sensing the high pressure fuel pulses. This tach sound like a great solution for my situation. Does anyone have experience with these tachs? Any recommendations?
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Old 12-24-2009
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Never heard of it, but it sounds like it should work.

Most diesel tachs work in one of two ways: Counting pulses from the alternator, or counting pulses from the teeth on a gear ring on the camshaft. So, pulses is pulses and this one is counting pulses from the fuel injectors.

Should work just as well, clever idea.

You probably an get a used Yanmar gauge from Sailorman (Ft. Laud) or some of the other "used boat parts" places, with a little patience. Then it is just a question of whether you need a sender, or a connection to the alternator, and you probably can fix up the original system too.
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Old 12-25-2009
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Originally Posted by hellosailor View Post
Never heard of it, but it sounds like it should work.

You probably an get a used Yanmar gauge from Sailorman (Ft. Laud) or some of the other "used boat parts" places, with a little patience. Then it is just a question of whether you need a sender, or a connection to the alternator, and you probably can fix up the original system too.
Thanks for the suggestion and pointing me toward the Sailorman site. I have several items which I would like to find used replacements for.
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Old 12-26-2009
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Could be the PO replaced the altenator with one off a gas engine that won't drive the tach.

If you look at the back of the alt. it should have a terminal marked tach.

Use a anolog volt meter and you should see the neddle bounce when the alt. is turned by just cranking, most digital meter won't read this pulse.
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Old 12-26-2009
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Quote:
Originally Posted by dreuge View Post
I have come across Tiny-Tach desiel (http://www.tinytach.com/tinytach/diesel.php). It works by sensing the high pressure fuel pulses. This tach sound like a great solution for my situation. Does anyone have experience with these tachs? Any recommendations?
I have used them. I also had a minor problem (can't remember the problem, but I can remember the fantastic customer service I got. I "think" I ordered the wrong one and they replaced it at their shipping costs)

They answer the phone and they give excellent advice. Also - very very easy to install. A big bonus is that when not in the "Tach" mode - it is an engine hour meter. And no - I do not own shares and am not related to anybody at the company.

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Old 04-30-2010
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Update on TinyTach

Well I went ahead and purchased a TinyTach diesel. The installation was a snap, my only concern was having a long enough cable to go from the transducer to the module. It is a coaxial cable, and so it would not be easy to correctly splice on an extension.

I purchased the unit with 12' cable (default is 8') and had no problems installing the transducer & running the cable neatly from the engine to the yanmar cockpit engine console panel. I mounted it just under it.

It works fine. I especially like the true engine hour meter which is built into this unit.
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