Northern Lights — SP-6 Valve Clearances
Adjustments · Valve train
From a Northern Lights owner's manual covering: 844DW3, 844LW3, M20CRW3, M844DW3, M844LW3, M844W3. Check it applies to your exact model before use.
Applies to: Northern Lights M20CRW3, Northern Lights M844DW3, Northern Lights M844LW3, Northern Lights M844W3, Northern Lights 844 (844L for LW models) engine, Northern Lights 844L engine
Procedure
- Adjust valve clearance after 1000 hours or as needed.
- Bring No. 1 cylinder to top dead center on the compression stroke; align top mark of crank pulley with timing gear case.
- Remove the rocker arm cover and turn the crankshaft forward and backward to confirm TDC.
- Loosen the lock nut and adjust clearance between rocker arm and valve guide with the adjustment screw.
- Repeat steps 3 and 4 for each cylinder; adjust each valve set individually.
- Replace the rocker arm cover and tighten cover nuts.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Clearance on both intake and exhaust valves: 0.008 in. (0.2 mm)
- Rocker arm cover nuts: 5 - 8 ft/lbs (0.8 - 2.3 kg/m)
Full service-parts list: Northern Lights M20CRW3 →, Northern Lights M844DW3 →, Northern Lights M844LW3 →, Northern Lights M844W3 →
Source: Northern Lights owner's 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.