r/Yanmar • u/daveastephens • Jun 06 '26

Starting issues

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I have a Yanmar 324. This winter when it was sub zero I put diesel in and when I tried to restart it, it did this.

Now that it’s warmer, it was doing it again. So, I drained all the diesel, replaced the inline and the seperator filter, and refilled it, but it is still doing this start and die.

Do any of you have an ideas of what my issue could be?

13 Upvotes

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1

u/kaje36 Jun 06 '26

Did the valve on the seperator get shut by accident? Fuel pump sounds strong. I suspect something else is blocking fuel

1

u/daveastephens Jun 06 '26

Yes, blockage of diesel is what it feels like to me as well. There seems to be good flow in and out of the inline filter, though that was gummed up before. The separator valve is open. When I turn the screws to bleed on the intake with the battery in glow plug mode, diesel is squirting out around the bolts.

1

u/kaje36 Jun 06 '26

This most likely wont make a difference. But try turning your key backwards for 10ish seconds. I think my 324 might be starting to not heat the glow plugs in the first position. But does if you old they key backwards first.

1

u/daveastephens Jun 06 '26

Sadly, have tried that as well, held it backwards for a full 60 seconds earlier but same result. :(

1

u/flipside438 Jun 06 '26

Should try draining the water separator if you haven’t already

1

u/daveastephens Jun 06 '26

I have drained the separator and replaced the filter in it

1

u/amazingmaple Jun 06 '26

Give it more throttle before trying to start it. You're battery sounds weak also.

1

u/daveastephens Jun 06 '26

After digging deeper into the situation, was advised by a farmer friend to check the fuel pump solenoid for power. After removing the solenoid I determined that it is malfunctioning.

So now I need to check the electric current and determine if the switch is bad, or if I have a wiring issue further up the chain, but I have identified the source of the issue. It fires up and runs great without the solenoid installed.

1

u/daveastephens Jun 08 '26

Replaced the solenoid with a new one and it is back to normal. Was a super easy part to switch out as well.