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Old 19-12-2015, 21:21   #1
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installing a tachometer

I need to install a tachometer,my boat did not come with one. My engine is a 5411 universal with a stock size alternator,is there a specific tach for that motor and whats the procedure on connecting it to the alternator.
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Old 19-12-2015, 23:58   #2
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Re: installing a tachometer

Diesel Tiny-Tach | Design Technology, Inc., Home of Tiny-Tach
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Old 20-12-2015, 06:54   #3
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Re: installing a tachometer

You can get a 4000 rpm diesel tach from any of the boat supply outfits, Faria, VDO. There will be instructions with it for connecting to an alternator or a electric sender.
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Old 20-12-2015, 08:23   #4
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Re: installing a tachometer

That tiny tach looks great and will fit on my existing panal.
Great idea
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Old 20-12-2015, 10:55   #5
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Re: installing a tachometer

I went online to research the tiny tach and i found no mention of them for use on diesel engines.
Does any one have experience with connecting one of these types of techs to a diesel?
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Old 20-12-2015, 11:06   #6
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Re: installing a tachometer

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Originally Posted by tommyh View Post
I went online to research the tiny tach and i found no mention of them for use on diesel engines.
Does any one have experience with connecting one of these types of techs to a diesel?
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Diesel Tiny-Tach | Design Technology, Inc., Home of Tiny-Tach

Instructions
http://tinytach.com/installation-diesel.php
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Old 20-12-2015, 11:37   #7
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Re: installing a tachometer

I looked into TT when researching TACHS. Go ahead! Find a tach for a three cylinder diesel that won't cost near the price of the engine ! . Options are limited to sending units, alternator mods to gain control wire and mechanical connections; if available.All rather pricey.
Apparently, the TT has issues with weather, moisture and longevity..; besides being small and guard to read from half a 'pit away..

I ended up purchasing a laser "timing light" type on sale at HF and checking the RPM at a couple of sweet spots. While not specifically accurate; not worse than reports of other types being off some I'll eventually get 'round to a proper attach in the panel; but not while other stuff needs doing.

HTH
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Old 20-12-2015, 12:17   #8
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Re: installing a tachometer

so it uses the fuel line for signal what section of the fuel line;
pick up?
before injection pump?
after pump?
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Old 20-12-2015, 15:56   #9
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Re: installing a tachometer

Clamps onto the fuel rail line, you need to know if you have 1/4" line or the 6mm.
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Old 20-12-2015, 19:49   #10
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Re: installing a tachometer

Clamps on to any one of the lines after the injection pump. I noticed that they now have one with a waterproof display but only for the gasoline model. I actually did not buy these but I have researched them. It is good technology, just a poor quality display. I too use a handheld laser tach. Knowing my exact rpm is not that important to me. Unless you are under propped there is no danger of over revving the engines. I spent they money on some more important equipment (fuel gauges and exhaust temp sensors). I keep waiting for them to come out with a better display.
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Old 20-12-2015, 20:06   #11
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Re: installing a tachometer

[QUOTE=Thumbs Up;1993248]I spent they money on some more important equipment (fuel gauges and exhaust temp sensors).

What good is EGT if you don't have a mixture control? You may know what the temp of your exhaust is but what can you do about it? CHT would be a better instrument.
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Old 21-12-2015, 05:53   #12
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Re: installing a tachometer

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What good is EGT if you don't have a mixture control? You may know what  the temp of your exhaust is but what can you do about it?
Actually, what I bought is an exhaust alarm kit. 20248 Exhaust Overheat Alarm Kit. Twin [] - $117.00 : AQUALARM, Warning Systems For Land And Sea
activates an alarm if your exhaust overheats. Same purpose as a cooling water flow alarm but much easier to install.
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