Re: Intermittent starting issue


eric freedman
 

There are a umber of things that can cause intermittent starting issues. The Valeo solenoid requires a lot of current to close it.

 

One ghost I found was behind the panel on my Yanmar. For some reason Amel installed a butt connector in the start wiring circuit. When you turn the key, everything works and the Valeo solenoid tries to close. After removing the butt connector and soldering the wires that issue went away. There are a lot of goblins in the starting circuit.

Fair Winds

Eric

Kimberlite Amel Super Maramu #376

 

 

From: main@AmelYachtOwners.groups.io On Behalf Of Bill Kinney
Sent: Wednesday, July 14, 2021 10:23 AM
To: main@AmelYachtOwners.groups.io
Subject: Re: [AmelYachtOwners] Intermittent starting issue

 

Pat,

Intermittent failures can be such… fun.

If I understand correctly, when you have this issue with starting, the blowers do not run as well.  That narrows down the likely causes quite a bit.  

The key switch, or the wiring around it would be my prime suspect, although it could be other things too.  12V power comes from the engine, up to the key switch.  When the switch is “ON” the power is sent back to the engine, and to the relays that turn on the blowers.  If the blowers and the starter are showing common failure, then the fault must be before the wires divide on the positive side, or maybe after they come together on the negative side back to the battery.

Another place to look is the isolating relay in the ground wire.  If that is intermittent in operation, or has bad contacts, to could interrupt the circuit on the return side.  I think this is unlikely, because the blower negative return is connected on the battery side of this. Other than those two, its a matter of pulling and cleaning connections to be sure contact is good.

Key switches on both Volvo and Yanmar panels are not 100% waterproof, maybe a bit less so with the key left in.  A drop or two of salt water inside, and things can get unreliable. I have never disassembled one to clean it, although I have replaced them.

Bill Kinney
SM Harmonie
Brunswick, GA, USA

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