Cummins/Onan — LPG Vaporizer Adjustment
Adjustments · Fuel System
From a Cummins/Onan service manual — check it applies to your exact model before use.
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Procedure
- Place vaporizer in vise or suitable clamp.
- Attach air hose at approximately 75 psi to inlet.
- Attach pressure gauge capable of reading over 7 psi to outlet.
- Back off adjusting screw until only one or two threads engaged.
- Apply air pressure.
- Turn pressure adjusting screw in slowly until gauge reads 7 psi.
- Tighten lock nut and remove gauge and air line.
Tools required
- Pressure gauge Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Working pressure: 7 psi (48.3 kPa)
Source: Cummins/Onan service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.