Volvo Penta 855476 Vibration Damper Crankshaft Pulley AQ131A AQ131B AQ125B 4cyl 18hp Sensor 87-91019A3 Is still installed

Sensor 87-91019A3 Is still installed in this

Pin:  302504

The gear set here is 43-55766 &  43-55778A3 (Sierra equivalent 18-2205)  (Also Equivalent to 43-55766A2 / 43-55766A3 as indicated in earlier parts manuals) 20-24 (tooth count) 1

1975-1990 Mercury 3cyl Outboards

Volvo Penta 855476 Vibration Damper Crankshaft Pulley AQ131A AQ131B AQ125B 4cyl 18hp Sensor 87-91019A3 Is still installedItem Details & Compatibility From a AQ125B 4 Cylinder Sterndrive (B230 Block) Looks like these were in AQ131A AQ131B AQ131C AQ131D & AQ125B AQ145B applications as well as the same part number. Notable Part Number(s) 855476 Vibration Damper Crankshaft Pulley Balancer 2 Groove Version (You do see other versions of this where it is either 3 groove and all of the grooves are the same size or a another 3 groove version where the two "forward" grooves are