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Mercury 3" and 4" Blocked Flow Riser/Elbow Gasket replaces MerCruiser part # 27-860231
Exhaust Elbow Gaskets have side leakage-proof treatment and sticking proof treatment.
Mercury 3" and 4" Restricted Flow Riser/Elbow Gasket replaces MerCruiser part # 27-860233
WASHER Mercruiser 525-12-78688
Supersedes: 12-814432
GASKET Mercruiser 27-866027
GASKET Mercruiser 27-861246
GASKET Mercruiser 27-860304
GASKET Mercruiser 27-866326
GASKET Mercruiser 27-863895
Supersedes: 27-863891 27-863893
GASKET Mercruiser 27-86389
GASKET Mercruiser 27-86015