Heater glowplug

[Tex]

Can anyone advise on the glowplug for a Mikuni MY30?
Is the glowplug the same as used in other makes?
Thanks

 

[jdc]

Its part number is Mikuni 061 121, which is the same as Beru GH408, VW 251963319D or Durite 0-131-70

It's a very common part. I bought the Beru one on eBay. Correction: I bought it from https://www.sparkplugs.co.uk/beru-glow-plug-gh408

 

[hpeer]

Would it also work on an Espar /Eberspaescher D4?

 

[VicS]

Would it also work on an Espar /Eberspaescher D4?

no

 

[Blue Sunray]

I don't suppose anyone has a set of servicing instructions for the MY30?

 

[hpeer]

OK and thanks. It seems the parts stream is more limited here in the USA.

 

[jdc]

I have. if you want a copy pm me with your email address.

 

[sailorman]

I have. if you want a copy pm me with your email address.

Ooooooooooo yes pls
stand by for PM

 

[Tex]

It now appears the glowplug is ok and that voltage drop is the problem. As this was ok are there any suggestions as to why this would now not be sufficient to get the glow plug working properly?

 

[PaulRainbow]

It now appears the glowplug is ok and that voltage drop is the problem. As this was ok are there any suggestions as to why this would now not be sufficient to get the glow plug working properly?

What's the voltage at the batteries before you turn the heater on ?

What's the voltage at the batteries when you turn the heater on ?

What's the voltage at the glowplug when it's powered ?

If it used to work, and now doesn't, due to low voltage at the glow plug, either the batteries are at a lower voltage than they used to be (failing, charger failing etc) or you have a bad connection. Don't just give connections a cursory inspection, remove/check/clean/tighten every single one. Start at the battery terminals, then isolator switch, and every connection that goes to the heaters main supply, also check the actual connection at the glowplug.

 

[VicS]

Not forgetting connections on the negative side too

 

[Tex]

I have checked all connections and all look sound, I have redone and tightened them all.
At rest battery shows 13.4V (shore power connected) but as soon as heater is turned on this drops to 11.4V and only getting 10.6V at glow plug..
Beginning to look like a battery issue??

 

[VicS]

I have checked all connections and all look sound, I have redone and tightened them all.
At rest battery shows 13.4V (shore power connected) but as soon as heater is turned on this drops to 11.4V and only getting 10.6V at glow plug..
Beginning to look like a battery issue??

A "battery at rest" means one which has not been on charge or been used for at least 12 hours Expect a good battery to read 12.7 ish volts. 13.4 is toolow if the battery is supposed to be charging but maybe thats what your charger floats at.

The immediate drop to 11.4 volts is not good. It does suggest the battery is past its best but not dead yet.

Somewhere between the battery and the glow-plug you are losing 0,8 volts.... that is definitely not right.

Check the volts between battery positive and glow plug positive, also between battery negative and glow-plug negative to determine if the volts drop is occurring in the positive or the negative wiring. Then check the offending wiring section by section between the battery and the glow-plug to determine exactly where the volts drop is occurring.

 

[Tex]

A "battery at rest" means one which has not been on charge or been used for at least 12 hours Expect a good battery to read 12.7 ish volts. 13.4 is toolow if the battery is supposed to be charging but maybe thats what your charger floats at.

The immediate drop to 11.4 volts is not good. It does suggest the battery is past its best but not dead yet.

Somewhere between the battery and the glow-plug you are losing 0,8 volts.... that is definitely not right.

Check the volts between battery positive and glow plug positive, also between battery negative and glow-plug negative to determine if the volts drop is occurring in the positive or the negative wiring. Then check the offending wiring section by section between the battery and the glow-plug to determine exactly where the volts drop is occurring.

Thanks for this. I will disconnect shore power and let everything sit for a day then check readings again.
Mikuni tell me I need 12.6 at glow plug, the at battery reading of 11.4 is not a good start.

 

[VicS]

Thanks for this. I will disconnect shore power and let everything sit for a day then check readings again.
Mikuni tell me I need 12.6 at glow plug, the at battery reading of 11.4 is not a good start.

Thats high !

Just by way of an experiment I measured the volts on a car battery with the headlights switched on. (A good 70Ah battery about 3 years old but little used and normally kept with an automatic charger connected)

Within a couple of minutes of disconnecting the charger and switching the lights on the volts had fallen and steadied to a touch below 12.2 volts.

Considering that you detected a 0.8 volt loss somewhere 11.4 at the glowplug may not be unrealistic. You'll certainly not maintain 12.6 with the glowplug load ( 20A) on.


Your loss could be bad crimps on the wiring. I once had to solder all the crimped terminals on a car battery wiring. Each one ( 8 in total )was was causing some volts loss. Individually not much but in total enough to make starting iffy in cold weather once the battery had passed its best

 

[Blue Sunray]

I have. if you want a copy pm me with your email address.

Hopefully you have received a (long overdue) pm from me.

 

[Blue Sunray]

I have. if you want a copy pm me with your email address.

Received, many thanks.