Craftsman Marine CM4.33 / CM4.42 — Inspection and tensioning of the V-belt
Adjustments
For the Craftsman Marine CM4.33 / CM4.42, from the Craftsman Marine owner's manual.
Applies to: Craftsman Marine CM4.33, Craftsman Marine CM4.42, Mitsubishi CM4.33 engine, Mitsubishi CM4.42 engine
Procedure
- Check the V-belt for wear and tear, cracks and fissures and ravels; replace if affected (engine not running).
- Check tension: correct if it can be moved by no more than 12 mm using thumb and forefinger and a force of about 10 kg.
- Loosen the bolts of the support and both bolts of the alternator.
- Tension the belt by pushing the alternator outward.
- First tighten the upper bolt of the alternator and thereafter the support and the lower bolt of the alternator.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Deflection no more than 12 mm with a force of about 10 kg
Full service-parts list: Craftsman Marine CM4.33 →, Craftsman Marine CM4.42 →
Source: Craftsman Marine 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.