Prop Exhaust Seal Ring for Mercury Trophy Propellers (Blow Out Ring)(878421)


Including: products as shown in the picture



For use with Mercury Trophy Plus and Powertech TRO4 propellers on V6 and V8 gear cases
Prevents "blowout" by filling in the gap between the prop and the gearcase
Converts 4-1/4" Trophy prop to fit 4-3/4" gearcase
Reduces ventilation
Part# 878421



Please be sure of your application before ordering as we do not offer refunds.   We do not accept returns in order to ensure viability of our products; please be 100% certain of the application before purchase. If you are not sure, please send us an email with your year make and model or a picture of your unit and we will get you going in the right direction!


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