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Nanni N3.21 Glow Plugs

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G'day! Can anyone out there suggest suitable aftermarket glow plugs for a Nanni N3.21 diesel engine? The engine is a marinised 21hp Kubota. The price of the OEM plugs are enough to suggest they come gold plated ...

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Beta engines also use Kubota basis. I've found no problems finding references for spares via various Beta websites via google. Also the local Beta agent, The Engineroom, is very good.

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How often do glow plugs need replacing?

Testing a glow plug

To test the glow plug, measure the resistance using a multifunction meter or ohmmeter The wires are to be disconnected before measuring. The exact value of each plug varies, but a defective plug can easily be distinguished from a working one. If a current passes through and the ohmmeter shows a value, it would be fair to assume that the plug is in working order. If it reads infinite, there is an interruption and it would be fair to assume that the plug is defective.

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