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Brian G. NY 
Orange Level
Joined: 12 Sep 2009
Location: 12194
Points: 2270
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 Topic: Hour Meter Install
Posted: 23 Jul 2010 at 12:43pm |
I want to install an hourmeter on my WD-45.
I would like to go the extra step and wire it so that it reads only when the engine is running rather than whenever the ignition is turned on.
I know they can be wired thru an oil pressure switch to accomplish this.
Would a common low oil cutoff switch from a portable generator or such work for this?
Does the WD-45 provide enuf pressure to close the points on one of those switches?
Should I just hook it into the ignition and forget it? LOL
Thanks for any help.
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kip in cny
Orange Level
Joined: 29 Nov 2009
Location: Jordan NY
Points: 538
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Posted: 23 Jul 2010 at 1:21pm |
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I would just wire it so when the key is on alot less work.
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160 CA 920diesel 5020 HD-3
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M Diesel
Silver Level
Joined: 26 Feb 2010
Location: Las Vegas
Points: 128
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Posted: 23 Jul 2010 at 4:14pm |
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A cutoff should work unless the idle pressure is down there a ways. I use a fuel pump safety switch. Those can be had down to 5 psi or so with a regular npt fitting. Not hard to do.
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Coke-in-MN
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Joined: 12 Sep 2009
Location: Afton MN
Points: 42086
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Posted: 23 Jul 2010 at 4:42pm |
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Go the extra and put a pressure switch in, you will not regret it as you will have accurate reading on hours.
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Life lesson: If you’re being chased by a lion, you’re on a horse, to the left of you is a giraffe and on the right is a unicorn, what do you do? You stop drinking and get off the carousel.
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Stan R
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Joined: 03 Dec 2009
Location: MA
Points: 996
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Posted: 23 Jul 2010 at 4:45pm |
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What would you expect the time difference be from Key on ONLY vs KEY on/ Engine On? I would suspect the difference would be insignificant and not justifiable to go beyond connecting it thru the key switch, so why bother.
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Chris/CT
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Joined: 11 Sep 2009
Location: Niantic, Ct
Points: 1939
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Posted: 23 Jul 2010 at 5:41pm |
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I have a AC [ what I think is an AC part] Hour meter if interested. I do not know if it is functional, e-bay purchase years ago, have no use for it.
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Jacob (WI,ND)
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Joined: 11 Sep 2009
Location: Kenmare, ND
Points: 1249
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Posted: 23 Jul 2010 at 8:08pm |
Here is another post about this, might help
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Jacob Swanson
1920 6-12; 1925,1926 20-35 longfenders; 1925,1926 15-25's; 1927,1929 20-35 shortfenders; C; B's; IB; WC's; WD; WD45
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firebrick43
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Joined: 10 Dec 2009
Location: Warren County
Points: 592
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Posted: 24 Jul 2010 at 12:36am |
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Google Tiny tach. They have some good hour meters that record only when the engine is firing. They have one wire that attaches to ground and one sense wire that wraps around a spark plug wire. This wire tell the hour meter that the engine is running and measures rpm. They are self powered by a battery and they can be mounted out of site with double sided tape or epoxy glue to not affect the original look or dash, or mounted in the open. They also give you an rpm read out to adjust your governor and idle speed. One model even has service reminders.
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