Mercruiser 454 Block Drain Plug Locations

First season to winterize a recently purchased cruiser with rwc 454 crusaders.

Mercruiser 454 block drain plug locations.

There s also a drain on the cool fuel system port side down around the bottom of the block towards the stern. Winterizing a stern drive boating 5 mercruiser br drain plugs p n 2001 baja boss 342 with 502 s serviced i have a mercruiser with mpd mercruiser 4 3l location of drain plugs page 1mercruiser 350 mag mpi drain plugs boat talk chaparral boatssingle point manual drain system mercruiser 4 3l marinesingle point manual drain read more. My boat is a 454 mag and i know i have 5 plugs 3 port side 2 starboard side. Yes the drain plugs being fouled with crud and scale is common.

Takes 3 gallons fill both hoses to exhaust manifolds takes about 1 gallon. I was going to winterize my friends boat 7 4 lx. Drain block with 2 plugs 2. Start from the highest drain and work down so you have water pouring out of all of them as you clean them.

Drain intake line at impeller and below oil cooler pull the 4 hoses off the thermostat housing. Two on the block port and starboard sides. When placing one of the engine block drain plugs back in after draining it would not tighten up and it appears that the threads in the block have corroded and pretty much degraded. On my friends boat i could only see 4 2 port 2 starboard elbow fitting and engine block pe side.

In the future keep a 4 6 and 8 nail handy and thouroughly have at it with the scale as the water is pouring out of the drain. The plug i took out does not appear to be brass. Winterize your boat the family handyman easy oil drain kit quicksilver new oem blue drain plug kit 5 mercruiser br drain plugs p n block drain thre are rusted page 1 mercruiser manifold block drain plug kit michigan motorzwinterize your boat the family handymanblock drain thre are rusted page 1 iboats boating forums 552819drain plug read more.