Cummins/Onan FM-JFE2 — Engine Disassembly for Valve or Piston Service
Repair & overhaul
For the Cummins/Onan FM-JFE2, from the Cummins/Onan service manual.
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Before you start
- If cylinder head sticks, tap sharply with hammer to loosen; never pry off with pry bar or screwdriver
- Be careful not to let pistons drop on sharp edges of crankcase
Procedure
- Drain all water from radiator and engine.
- Remove radiator outlet and inlet.
- Disconnect fuel line to carburetor.
- Remove air cleaner and choke assembly.
- Disconnect governor arm at carburetor.
- Remove carburetor and intake manifold.
- Disconnect ignition wires and remove spark plugs.
- Remove magneto assembly.
- Remove tappet cover.
- Remove cylinder head nuts and lift cylinder head from block.
- Remove cylinder bolts and then cylinder from base.
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.