Volvo Penta — Marking pattern, checking (reverse gear MS2)
Adjustments · Reverse gear MS2 gears
From a Volvo Penta service manual — check it applies to your exact model before use.
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Procedure
- Remove the output bearing housing and apply marking dye to the lower gear and output gear wheel.
- Install the bearing housing and turn tool 884735 both directions while braking the propeller shaft flange.
- Check whether the marking pattern corresponds with pattern A (correct).
- If pattern is like B, move the output shaft inwards by removing shims.
- If pattern is like C, move the output shaft and lower gear wheel in opposite directions.
- When correct, disassemble, wash off dye and reassemble with the calculated shim thickness.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Flank clearance: 0.10-0.25 mm (0.004-0.010")
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.