Engine hour meter
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I have hull # 53 and I did not get an engine hour meter as advertised in the motor spec. I have been unable to get an answer, only that J/Boats has the right to change the eqpt. without notice. Every motor spec. lists an hour meter every year. How many boats came with an hour meter or furnished later?
[Posted by: walter prater
]
[Posted by: walter prater
]
I just purchased Hull#44 last month. It has the Yanmar 3GM30 engine and Panel B for the instruments. Like you everything I read stated an hour meter was provided, but they weren’t in the older models. My understanding is the newer Yanmar 3YM30 engines from this year have an instrument panel with an hour meter. I will be adding one shortly. There are the simple older analog ones I’ve seen at West Marine, but I also found on the web an electronic digital hour meter as well. If you want more details let me know.
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- Posts: 14
- Joined: Wed Dec 31, 1969 8:00 pm
- Vento Solare
- Posts: 428
- Joined: Wed Dec 31, 1969 8:00 pm
- Location: Newport, RI
Fix for failed: Engine hour meter
The engine hour meter on Vento Solare, hull #266 did not work when I purchased the boat. I did some research and found this is a common problem with the Yanmar / VDO meters. It turns out that there is a silicone seal applied to the circuit area near the LCD that absorbs moisture and causes the failure. The meter actually still records the engine hours, it is the display that stops working. The attached solution was found on the Sailboatowners.com forum. Attached is the document that explains how to fix the meter. This is a photo of the repaired meter for Vento Solare showing the real engine ours accumulated.

I cleaned the surface per the instructions using a toothpick I cut with a razor blade to a chisel tip. I then tested it.
The connector pinout and wire colors that I obtained from Vento Solare are as follows (pins as marked on the back of the white tachometer case):
1 Red/Black +12V
2 Red +12V
3 Black 12V return
4 Orange tach input from alternator
5 Black 12V return
The recessed yellow button above the Tach/Hours label is used to program/calibrate the tachometer. Use the procedure in this document to accomplish that.

I cleaned the surface per the instructions using a toothpick I cut with a razor blade to a chisel tip. I then tested it.
The connector pinout and wire colors that I obtained from Vento Solare are as follows (pins as marked on the back of the white tachometer case):
1 Red/Black +12V
2 Red +12V
3 Black 12V return
4 Orange tach input from alternator
5 Black 12V return
The recessed yellow button above the Tach/Hours label is used to program/calibrate the tachometer. Use the procedure in this document to accomplish that.

- Attachments
-
Repair of Yanmar Tach updated.pdf
- (504.38 KiB) Downloaded 2631 times
Re: Engine hour meter
Great find! I'm going to pull my tach this weekend and give this repair a try.
-Christopher
sweet caroline # 239
-Christopher
sweet caroline # 239
-Christopher
sweet caroline # 239
sweet caroline # 239
Re: Engine hour meter
Bill,
How did you remove the tach from it's case? I have it sitting on my desk and I removed the three Torx screws from the back. Does the front clear plastic shield pry off?
Thanks.
How did you remove the tach from it's case? I have it sitting on my desk and I removed the three Torx screws from the back. Does the front clear plastic shield pry off?
Thanks.
-Christopher
sweet caroline # 239
sweet caroline # 239
- Vento Solare
- Posts: 428
- Joined: Wed Dec 31, 1969 8:00 pm
- Location: Newport, RI
Re: Engine hour meter
Christopher,
Once you remove the 3 Torx screws, the front lens can be pried off. It is a snug fit and there are two layers of acrylic lens separated by a hard rubber gasket. Once the lens is removed, the guts are removed from the front of the case.
Once you remove the 3 Torx screws, the front lens can be pried off. It is a snug fit and there are two layers of acrylic lens separated by a hard rubber gasket. Once the lens is removed, the guts are removed from the front of the case.
Re: Engine hour meter
Thanks that worked. I was able to get the gauge apart and the old silicone cleaned out. The hour meter appears to have gone from working around 20% of the time to around 70% of the time. I left it on the test bench running for a while yesterday. I might mess with it a little more when I get a chance next week to see if I can get it working 90% of the time.
Thanks for posting the repair.
Thanks for posting the repair.
-Christopher
sweet caroline # 239
sweet caroline # 239
Re: Engine hour meter
Now if I only knew how to make the boat go fast...
-Christopher
sweet caroline # 239
sweet caroline # 239