Northern Lights M150A13 / M80A13 — Check and Adjust Engine Valve Clearance
Adjustments · Engine valve train
For the Northern Lights M150A13 / M80A13, from the Northern Lights owner's manual.
Applies to: Northern Lights M150A13
Procedure
- Lock No. 1 piston at TDC compression stroke.
- Adjust No. 1 and 3 exhaust and No. 1 and 2 intake valves.
- Rotate engine to No. 4 piston TDC compression stroke.
- Adjust No. 2 and 4 exhaust and No. 3 and 4 intake valves.
- Set cold intake clearance to 0.35 mm.
- Set cold exhaust clearance to 0.45 mm.
Tools required
- feeler gauge Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Intake valve clearance cold: 0.35 mm (0.014 in.)
- Exhaust valve clearance cold: 0.45 mm (0.018 in.)
- Firing order: 1-3-4-2
Full service-parts list: Northern Lights M150A13 →
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.