Westerbeke — Alternator Belt Tension Check
Adjustments
From a Westerbeke operator's manual covering: 12.5, 7.5, 7.7KW. Check it applies to your exact model before use.
Applies to: Westerbeke 12.5
Before you start
- Never attempt to adjust fan belt tension while engine is in operation.
Procedure
- Depress belt with finger between pulley and pulley on long distance side.
- Proper tension gives 10 to 12 mm (0.39 to 0.47 in) deflection.
- Adjust excessive tension or slackness as needed.
Specs & values
- 10 to 12 mm (0.39 to 0.47 in) deflection
Full service-parts list: Westerbeke 12.5 →
Source: Westerbeke operator'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.