Large Exhaust Flapper With Clamp | Sierra 18-4458 Water Hoses Helping Hands: CDI doesn't just

Helping Hands: CDI doesn't just make parts

This should be done according to the manufacturer's recommendations

Fits Mercury 15 HP 2 cylinder outboard engines using bullet connection pack with serial number range1988 to 1997 with serial number range 0A197112-0G760299

For Mercury 4 through 6 hp 4-stroke outboards (serial number 0R411838 and above)

CRUSADER Relay Bracket and Mounting 98172

Large Exhaust Flapper With Clamp | Sierra 18-4458 Water Hoses Helping Hands: CDI doesn't justLarge Exhaust Flapper With Clamp Sierra 18 4458 Exhaust protector valve mounts on the outside of 5 in. & 6 in. exhaust tip to prevent backflow of water into the exhaust.