Couple of questions for Yanmar Owners

[NorthernFocus]

Just getting acquainted with a new Yanmar 4jh110. Wondering whether some things are typical or decisions made by installer.

1) Is your ECM mounted on the engine or remote(bulkhead etc)?
2) Is the power supplied to your ECM directly from battery or through a switch?
3) Have you found a source for technical manuals(installation, etc) more than just the owner's manual supplied with the unit?

Thanks in advance for any responses.

 

[RTC]

Just getting acquainted with a new Yanmar 4jh110. Wondering whether some things are typical or decisions made by installer.

1) Is your ECM mounted on the engine or remote(bulkhead etc)?
2) Is the power supplied to your ECM directly from battery or through a switch?
3) Have you found a source for technical manuals(installation, etc) more than just the owner's manual supplied with the unit?

Thanks in advance for any responses.

 

[RTC]

I have had a Yanmar 4JH110 in my RT25SC for over 3 years. Love it! To answer your questions:
1. ECM mounted to engine
2. ECM is direct to battery with separate breaker. Starter is thru the engine switch.
3. Not looked for installation instructions. I had installation done by yard that builds boats and installation certified by Yanmar dealer.

 

[NorthernFocus]

I have had a Yanmar 4JH110 in my RT25SC for over 3 years. Love it! To answer your questions:
1. ECM mounted to engine
2. ECM is direct to battery with separate breaker. Starter is thru the engine switch.
3. Not looked for installation instructions. I had installation done by yard that builds boats and installation certified by Yanmar dealer.

Thanks for the reply. We just rolled over 100 hours on our last trip. I like what I've seen so far.

Did your installer run a cable direct from the alternator to battery/buss per a typical installation?

 

[RTC]

Sorry getting back so late. I have been busy installing new electronics and with the boat an hour away from where I live I have focused on the installation. I did this weekend try and trace the cable from the alternator and so far not been able to determine where it is terminated. When I figure it out I will let you know.

 

[NorthernFocus]

Sorry getting back so late. I have been busy installing new electronics and with the boat an hour away from where I live I have focused on the installation. I did this weekend try and trace the cable from the alternator and so far not been able to determine where it is terminated. When I figure it out I will let you know.

I asked the question more in the context of a caution. Yanmar has wired a sort of "back door" charging circuit. There is a fused circuit of two no.10 wires that run from the alternator, under the engine, and land on the positive post of the starter. If your installer ran a cable from the alternator directly to the battery/buss as is normally done then the engine battery switch is effectively bypassed. I only figured this out by accident. I forgot to turn the engine battery switch on but the engine started anyway. Took me a while to figure that one out. Only did so by finally locating an electrical circuit drawing that showed the fused circuit mentioned above.

 

[RTC]

I asked the question more in the context of a caution. Yanmar has wired a sort of "back door" charging circuit. There is a fused circuit of two no.10 wires that run from the alternator, under the engine, and land on the positive post of the starter. If your installer ran a cable from the alternator directly to the battery/buss as is normally done then the engine battery switch is effectively bypassed. I only figured this out by accident. I forgot to turn the engine battery switch on but the engine started anyway. Took me a while to figure that one out. Only did so by finally locating an electrical circuit drawing that showed the fused circuit mentioned above.

Thank for the heads up. I think mine is wired correctly since I need to turn on the engine switch, but I will check. Also on mine I need to make sure the ECM breaker is closed. The ECM breaker is somewhat hidden in the engine compartment helping with theft protection.