Volvo Penta — Propeller shaft alignment to reverse gear flange
Adjustments · Propeller shaft / reverse gear flange
From a Volvo Penta service manual — check it applies to your exact model before use.
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Before you start
- Re-check alignment a few days after launch when the boat is completed and rigged (sailboats).
Procedure
- Before connecting the shaft, check the flanges are parallel.
- Move the flanges together so the guide engages.
- With flanges pressed together, verify a 0.10 mm feeler gauge cannot be inserted anywhere.
- Turn the flanges 90°, 180° and 270° and repeat the check at each position.
- If deviation is greater than 0.10 mm, re-adjust the alignment.
- Connect the shaft to the reverse gear flange or flexible coupling.
Tools required
- Feeler gauge Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Feeler gauge limit: 0.10 mm (0.004")
Source: Volvo Penta 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.