2000 Hunter 340 …..On my Yanmar 3GM30F, the tachometer has started to fluctuate. This has happened twice before, years apart in events.
It is more annoying to watch than it is critical.
It’s not a digital reading, it’s the original analog tachometer with hour meter.
What happens is the reading just isn’t right.
Normally I idle at 900 RPM and cruise at 2500 - 3000 RPM.
Today my 900 RPM reading was 1500 and my cruise reading was 4000 RPM. (I was pegged out!)
The engine is running the same and is quite easy to run by sound rather than actual RPM readings.
I did what I have done in the past when this happened. I took the 2 connectors off the sensor on the transmission, cleaned them with a quick wipe of emery cloth and put them back. Now all is good again.
In fact the connectors looked bright and clean when I removed them, fit tight and snug. I checked the same at the tachometer and they were clean as well.
Is anyone else having this experience with their tachometer?
Are you applying any spray sealer on the connected fittings?
It is more annoying to watch than it is critical.
It’s not a digital reading, it’s the original analog tachometer with hour meter.
What happens is the reading just isn’t right.
Normally I idle at 900 RPM and cruise at 2500 - 3000 RPM.
Today my 900 RPM reading was 1500 and my cruise reading was 4000 RPM. (I was pegged out!)
The engine is running the same and is quite easy to run by sound rather than actual RPM readings.
I did what I have done in the past when this happened. I took the 2 connectors off the sensor on the transmission, cleaned them with a quick wipe of emery cloth and put them back. Now all is good again.
In fact the connectors looked bright and clean when I removed them, fit tight and snug. I checked the same at the tachometer and they were clean as well.
Is anyone else having this experience with their tachometer?
Are you applying any spray sealer on the connected fittings?
