It's added to SMC and BMC composites to counteract resin shrinkage during curing
MD1B 4-Stroke 3586494 MD1 from serial #14016+ Volvo Penta MD2
As a general maintenance guideline
Brand Part Number Sherwood 10615K-SHW Sierra 18-3047 Sierra 18-3061 Crusader 20300 Crusader 20310 Crusader R061017 Pleasurecraft R061017 Pleasurecraft RP061017 Oberdorfer 8922 Volvo Penta 835874 Jabsco 18948-0001-P Johnson 09-702B-1 Yanmar 128170-02070 Cummins 3908220 Cummins 810615 Cummins B10615 Cummins CO1320292 Cummins CO1320348 Onan 132-0292 Onan 132-0348 Onan 132-0349 Perkins NA900012 Chris-Craft 16
If you encounter any issues
Rubber Diaphragm Seal Kit – Fits Volvo Penta Saildrive 110S/120S/130S/150S/MS25S (Replaces 21389074) Jabsco It's added to SMC andProduct Details This aftermarket Rubber Diaphragm Seal Kit Fits Volvo Penta Saildrive 110S 120S 130S 150S MS25S (Replaces 21389074) is engineered for Volvo Penta saildrives, including the 110S, 120S, 130S, 150S, and MS25S series. It provides a robust, watertight seal for the critical interface between the hull and the saildrive unit, preventing water ingress and protecting mechanical components. This kit is a direct replacement for Volvo Penta part