Onan Gen HGJAB What is the best spark plug and gap?

Ultra

Member
I have been working on my gen now for about 8 hrs. Changed oil, oil filter, and air filter and fuel filter. What is the best plug to put in the gen. Mine has the NGK's already in it but had bad gas so clogged everything up. Not sure if they are the right cross over plug. Does anyone know the correct original champion plug number? Also what is the the correct gap on the plugs? TIA, Ultra
 
Spark plug is NGK BPR4EY


Torque to 18 ft-lb

Gap: 0.025

I have the service manual for this gen set in electronic form if you need it.

Sean
 
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