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Old 09-05-2015, 07:07 AM   #21
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SO its off , make a correction table.

Works for your compass , why not the hour counter?
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Old 09-05-2015, 07:35 AM   #22
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Just proof that the hours on engines meters means very little when buying used.
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Old 09-05-2015, 07:43 AM   #23
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Just proof that the hours on engines meters means very little when buying used.

That's so true, even if they are accurate and have never been replaced.
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Old 09-06-2015, 07:47 AM   #24
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Low hours would be more frightining than high hours on a diesel boat.

The maint involved with NOT using an engine can be more costly than from normal operations.
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Old 09-06-2015, 10:45 AM   #25
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Low hours can also mean a replaced meter at some point as they tend to not last forever, this should be noted in the maintenance log but is not always.

Most marine hardware dies from time and neglect and is not worn out, while I type this stuff on the boat is breaking.
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Old 09-06-2015, 11:02 AM   #26
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What is best way to troubleshoot tach? My starboard tach died this summer on my trip.
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Old 09-06-2015, 11:08 AM   #27
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When I replaced my hour meter a few months ago, I wired it to a 12v battery until it had clocked the previous HM hours, which was about 350 hours. That way it began its duty with the correct number of hours.

Cheers, Bill
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Old 09-06-2015, 12:57 PM   #28
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Found this old tach in a box of parts. It came out of an old wooden boat that was being scrapped. I think it had a Perkins 354. I did not even look at it til it was back at the shop.

52963 x 100000 rev's is 52963hr at 1667rpm.

This HM did not break. I tested it with a drill and it still works.

Mechanical tach. Can't find brand on it anywhere!!! Looks like a Stewart Warner.
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Old 09-06-2015, 01:03 PM   #29
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When I replaced my hour meter a few months ago, I wired it to a 12v battery until it had clocked the previous HM hours, which was about 350 hours. That way it began its duty with the correct number of hours.

Cheers, Bill


Mine would have taken 230+ days.

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Old 09-06-2015, 01:09 PM   #30
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Found this old tach in a box of parts. It came out of an old wooden boat that was being scrapped. I think it had a Perkins 354. I did not even look at it til it was back at the shop.

52963 x 100000 rev's is 52963hr at 1667rpm.

This HM did not break. I tested it with a drill and it still works.

Mechanical tach. Can't find brand on it anywhere!!! Looks like a Stewart Warner.
Kinda hard to imagine 52,963 hours out of one Perkins engine. Maybe it was used on more than one engine.

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Old 09-06-2015, 01:11 PM   #31
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What is best way to troubleshoot tach? My starboard tach died this summer on my trip.
What tach is it? If it's the tach it self, special test equipment is needed to test it. You could call Seattle Speedometer. They should be able to help you or at least repair it. There might be a similar company in your area that does repairs on automotive instrument panels.

Home - Seattle Speedometer - The Northwest's premier speedometer repair and restoration shop.
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Old 09-06-2015, 04:55 PM   #32
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When I replaced my hour meter a few months ago, I wired it to a 12v battery until it had clocked the previous HM hours, which was about 350 hours. That way it began its duty with the correct number of hours.

Cheers, Bill
I'm doing the same thing....Had it all caught up at 1485 hours then never got in installed. Need to add a few now (to 1562) and get it wired!

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Old 09-06-2015, 08:40 PM   #33
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When I was doing new Defever deliveries in 1983/84 time frame, dealer would disconnect meter at beginning of the trip. The boats were off loaded in Baltimore, commissioned in Annapolis and delivered to boat shows up and down the east coast. I asked the dealer who would think that their new boat would have no hours on it? I was also told to shut up and say they do 11-12kts. One of my eye opening experiences of a 22year old.
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Old 09-06-2015, 09:32 PM   #34
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Why bother running the new meter up.
Replace the failed unit with a new one and LOG the hours.
Worked for two meters for me.
I kept the old meters so if questioned I can show them. If they don't believe me so be it.
The old meters both failed at about 15-1800 hrs. Both Hobbs mechanical.

The new one, a Hobbs Quartz, is running still pushing 3,000 hrs.
If it fails I will do the same as before.
All a meter means to me is when to do service work, either by hours or time, depending upon which is most important as most recreational boats don't clock a lot of hours.

Jim Cave,
I would suggest that you get yourself an independent hour meter if it concerns you. Install it where it can be seen when needed. It does NOT need to be front and centre. Log the hours with some notes about why you stopped trusting the original and that the new one is what you go by and carry on.

In my Mtce. log book is a light cardboard divider right at the front and in big letters when the changes were made. Also entered where the date would fall in the rest of the pages.
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Old 09-06-2015, 09:39 PM   #35
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Thanks Clectric. That's exactly what I was thinking as well.


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Old 09-07-2015, 06:57 AM   #36
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A good place for an hour meter is on your automatic bilge pump.
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Old 09-07-2015, 08:52 PM   #37
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I found out the other day that when I turn the power on at the helm station with the ignition key the hour meter runs even if I don't start the engine. So I have no idea how many hours are on my engine. I bought the boat in May and am keeping a log of the hours that I run the engine. The hour meter now means nothing to me.
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Old 09-07-2015, 09:14 PM   #38
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I found out the other day that when I turn the power on at the helm station with the ignition key the hour meter runs even if I don't start the engine. So I have no idea how many hours are on my engine. I bought the boat in May and am keeping a log of the hours that I run the engine. The hour meter now means nothing to me.
Why would you have the ignition key on if the engine isn't running?

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Old 09-07-2015, 10:30 PM   #39
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Why would you have the ignition key on if the engine isn't running?

Ted

Why does it matter. The thread is about an engine hour meter overestimating the time that the engine is running. I offered a reason as to why it would happen.
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Old 09-08-2015, 12:42 AM   #40
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jdud, does your boat have oil pressure/overheat alarms that sound when the key is turned on?
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