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Old 11-06-2014, 21:09   #16
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Re: Engine hour meter

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Originally Posted by Emmalina View Post
I use a tinytach .. Little digital thing that has a flow sensor you put on an injector line. It gives you exact RPM and only counts hours when the fuel is flowing. Can,t remember the price but not expensive. My old tacho just fills up a hole :-)
The installation is a little unclear to me: it mentions metal contact and fuel lines. So, it can't just be installed over the fuel hose?
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Old 11-06-2014, 22:10   #17
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Re: Engine hour meter

Maybe you calibrate the flow rate to
a tach and then just use the flow rate?
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Old 11-06-2014, 22:13   #18
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Re: Engine hour meter

And maybe they'll tell you how they do it on their website?
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Old 11-06-2014, 22:59   #19
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Re: Engine hour meter

I read their website, but still don't get how
it reads RPM from the fuel flow. My guess
is that it senses each flow-stop-flow-stop...
of the fuel and counts 1, 2... Is that it?
Then it must know if there are 1,2,3, or more
cylinders, right?
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Old 12-06-2014, 03:00   #20
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Re: Engine hour meter

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Originally Posted by jongleur View Post
I read their website, but still don't get how
it reads RPM from the fuel flow. My guess
is that it senses each flow-stop-flow-stop...
of the fuel and counts 1, 2... Is that it?
Then it must know if there are 1,2,3, or more
cylinders, right?
Yup you only have one fuel "spurt" for every rpm on an injector line ...Doesnt matter how many cylinders !!
The sensor goes on a fuel injector line (any)
I love it KISS at its best
PS I don't work for these guys its just a good product
Do a search for there website.
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Old 12-06-2014, 03:34   #21
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Re: Engine hour meter

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Yup you only have one fuel "spurt" for every rpm on an injector line ...Doesnt matter how many cylinders !!
That assumes it is a 2 stroke (one up & one down stroke). For a 4 stroke (two up & two down strokes) it would be 2 x RPM for every "spurt".
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Old 12-06-2014, 19:24   #22
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Re: Engine hour meter

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That assumes it is a 2 stroke (one up & one down stroke). For a 4 stroke (two up & two down strokes) it would be 2 x RPM for every "spurt".
Don,t know how you work that out
You only supply fuel to a chamber once per revoloution if its 4 or 2 stroke doesn,t matter unless you throw a lot of fuel away in your engine. The injector pump "spurts" pumps fuel through the injector ONCE per revolution of the engine. By the way 2 strokes don,t use injection !
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Old 12-06-2014, 19:30   #23
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Re: Engine hour meter

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Don,t know how you work that out
You only supply fuel to a chamber once per revoloution if its 4 or 2 stroke doesn,t matter unless you throw a lot of fuel away in your engine. The injector pump "spurts" pumps fuel through the injector ONCE per revolution of the engine. By the way 2 strokes don,t use injection !
You might be retarded too.
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Old 12-06-2014, 20:40   #24
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Re: Engine hour meter

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You might be retarded too.
Silly comments merit silly answers
I think the retard comment is uncalled for.

I was explaining the function of the item !
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Old 12-06-2014, 20:44   #25
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Re: Engine Hour Meter

Well, I managed to not achieve anything today. The hour meter is *beside* the electrical panel, not in it. One has to reach around and I am not sure how I am going to do anything with the meter itself without pulling out any of the wires.
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Old 12-06-2014, 20:49   #26
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Re: Engine hour meter

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Originally Posted by Emmalina View Post
Don,t know how you work that out
You only supply fuel to a chamber once per revoloution if its 4 or 2 stroke doesn,t matter unless you throw a lot of fuel away in your engine. The injector pump "spurts" pumps fuel through the injector ONCE per revolution of the engine. By the way 2 strokes don,t use injection !
You may want to rethink this statement
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Old 12-06-2014, 21:03   #27
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Re: Engine hour meter

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Originally Posted by Emmalina View Post
Don,t know how you work that out
You only supply fuel to a chamber once per revoloution if its 4 or 2 stroke doesn,t matter unless you throw a lot of fuel away in your engine. The injector pump "spurts" pumps fuel through the injector ONCE per revolution of the engine. By the way 2 strokes don,t use injection !
Huh? A 4-stroke diesel makes 2 revolutions for every power stroke. The strokes are: intake, compression, power, and exhaust. The injector sprays fuel in the cylinder at the top of the compression stroke. The piston goes down (power), up (exhaust), down (intake), up (compression). That's 2 ups and 2 downs--two revolutions of the crank shaft with only one injector pulse. Sorry, but your statement is incorrect.
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Old 12-06-2014, 21:13   #28
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Re: Engine hour meter

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You may want to rethink this statement
Indeed I am wrong the spurt is not once per rpm.
And as the tinytach I use does the division but it still remains accurate be it 4 or 6 cylinder.
The 2 stroke doesn't enter into this as the OP was refering to an inboard diesel engine.
I always like to admit my mistakes
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Old 12-06-2014, 23:53   #29
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Re: Engine hour meter

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Indeed I am wrong the spurt is not once per rpm.

The 2 stroke doesn't enter into this as the OP was refering to an inboard diesel engine.
Wrong again. Read up on Detroit (GM) Series 53, 71 or 92 diesels. They are 2 stroke inboard diesel engines with inlet valves, exhaust ports and (unit) injectors. Also found in many road vehicles!
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Old 13-06-2014, 00:01   #30
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Re: Engine hour meter

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Wrong again. Read up on Detroit (GM) Series 53, 71 or 92 diesels. They are 2 stroke inboard diesel engines with inlet valves, exhaust ports and (unit) injectors. Also found in many road vehicles!
Indeed wrong again

Mr Diesel was nearly killed by one !
Thought this was a boat forum though ! I may be wrong but I have never heard or seen a 2 stroke diesel used on a boat yet.
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