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Old 30-12-2020, 16:20   #1
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Universal M30 Fuel Injector Torque

I’m replacing the fuel injectors on my Universal M30 and I don’t see the torque specs on the service manual.
Can anyone help me out on this?
Thanks
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Old 30-12-2020, 17:07   #2
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Re: Universal M30 Fuel Injector Torque

If you dont get a specific Universal 30 response & its an 8mm stud I suspect it will be around 12-14 ft-lb.
If its a kubota base engine some of them have the same injectors as our Yanmar.
Hope that helps
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Old 31-12-2020, 03:05   #3
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Re: Universal M30 Fuel Injector Torque

Thanks but my Kubota injectors are the screw in type with copper crush washers
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Old 31-12-2020, 04:40   #4
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Re: Universal M30 Fuel Injector Torque

FWIW:
From page 7:
“Fuel injection nozzle
(4) Tighten the retaining nut to 43.5 to 58 ft-Ib (6 to 8 kgf. ml Any torque higher than this will cause slow action of the needle valve and poor injection”
https://www.westerbeke.com/technical...hnical_man.pdf
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Old 31-12-2020, 05:13   #5
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Re: Universal M30 Fuel Injector Torque

Thanks Gord,
Hopefully the engine will be running this afternoon.
Bill in JB
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Old 31-12-2020, 15:44   #6
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Re: Universal M30 Fuel Injector Torque

Quote:
Originally Posted by Quadrille in JB View Post
Thanks but my Kubota injectors are the screw in type with copper crush washers

Ah sorry my shot was wide of the mark.

Last 3 cylinder kubota I looked at had the collar with 2 studs hold down type.
Your injectors look like an easier to seal system.
Glad Gordmay chimed in quickly.
Hope the new injectors are the bees knees.
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Old 31-12-2020, 15:57   #7
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Re: Universal M30 Fuel Injector Torque

The injectors are replaced and the little Kubota runs like a top with no smoke.
The Admiral will be happy.
Thanks for all of your help
Bill in JB
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Old 31-12-2020, 16:25   #8
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Re: Universal M30 Fuel Injector Torque

Good stuff, a plan that worked
Glad you posted result, it's always better if the readers know the outcome.
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