Yanmar Bad design or scam

[Jammer]

Originally Posted by Emmalina

Contacts rated a 5A AC are very different to DC and inductive load !

You have to read the whole data sheet. There are multiple ratings listed:

(see image)


The relay in your photo with a clearly visible part number is a PE014 (the remaining digits reflect the choice of coil and have no bearing on switching capacity). It has Form A (normally open, NO) contacts.

The PE14 relay contacts in a form A configuration are rated 5A, 30 VDC, using either the IEC or UL test methodology.

Anyway, I'm just trying to help out by listing some alternative parts and by making it clear that the practice of using parts beyond their stated ratings is a fairly standard engineering practice. Though the experience you have had with these would certainly indicate that there's a problem with reliability, I don't think there's anything to suggest bad faith on the part of the maker.

[ThereAndBack]

Originally Posted by Emmalina

Having worked on a lot of these things I would like you to show me where the other start relay is ! Please find schematic attached but not the correct instrument panel. Also my point is IF they are so reliable how come I have changed about 5 in the last couple of years and I know many of the charter companies have also ! As I have stated AC and DC ratings differ vastly.

I don't know where in the diagram they are and maybe they're more properly called a solenoid, but I do have photos. These are not from my boat but they're the same on my boat. I know because I've had to change one! See pics.

[Emmalina]

Originally Posted by ThereAndBack

I don't know where in the diagram they are and maybe they're more properly called a solenoid, but I do have photos. These are not from my boat but they're the same on my boat. I know because I've had to change one! See pics.

On the AE version there is no solenoid its on top of the starter motor and pulls the bendix as it makes contact. Don't think you have the AE model

[skipperpete]

Here’s a clearer view[ATTACH]

[Emmalina]

Fact of the matter is they fail ! I have 5 on the bench and 3 arriving from another company for repair. If there is a solenoid or not this is a common problem and as charter boats work on engine more than private boats I would say if you have one of these panels be prepared !

[skipperpete]

Maybe you’re treating a symptom and not the cause. So far no one else is reporting any problems on this forum regarding B20 panels so there might be a fault with your charter boat installation wiring or earthing.

[ThereAndBack]

Originally Posted by Emmalina

On the AE version there is no solenoid its on top of the starter motor and pulls the bendix as it makes contact. Don't think you have the AE model

Mine are 2019 3ym30ae models.

[nfbr]

It's switching an inductive (coil) DC load.
Add a Snubber Diode to greatly increase contact life.
It's just a basic 1N4004 or better 1N4007 in reverse across the two wires.
It dumps the inductive arc and saves the contacts.

Also great on windlass switches.

[cabosn]

Originally Posted by nfbr

It's switching an inductive (coil) DC load.
Add a Snubber Diode to greatly increase contact life.
It's just a basic 1N4004 or better 1N4007 in reverse across the two wires.
It dumps the inductive arc and saves the contacts.

Also great on windlass switches.

Nfbr is absolutely correct. It may be that there is such a diode in your unit that has failed. It’s easy to blow them up, just reverse the polarity to the diode and it will be destroyed.

[Kenatsea]

I got tired of trying to troubleshoot mine over a year and a half. I just rewired it with a simple push button start switch and life has been good ever since.

[joeording3]

Wait for it, here come all the cranks replying with "You don't need those buttons I sailed 100,000 miles starting the engine with a screwdriver on the solenoid and stopping it with a paperback on the intake."

Have you tried reflowing the solder for the relays on the button board?

I have also had problems with newer Yanmar panels and various gremlins, either with the buttons or the instruments. It is a bit frustrating, and Yanmar is real proud of their parts based on the pricing, but overall they are great motors. We put over 8000 hours in a 4JH, and have another with over 5000 hours still going strong. Our 3YM is a baby with only about 2000 hours.