Brass or Steel freeze plugs in 7.4 mpi mercruiser

[jimmie]

i just had the motor rebuilt and im wondering does in make a difference to use brass or steel freeze plugs in the motor thanks james

[Boat Tech]

Originally Posted by jimmie

i just had the motor rebuilt and im wondering does in make a difference to use brass or steel freeze plugs in the motor thanks james

They need to be brass for marine use.

[Mbam]

What boat teck said, steel will go away fast.

[BillK]

James,
I always use brass but ... if the engine is a closed system with antifreeze, it should not make a difference. If it is "raw" water cooled then it most certainly needs brass.

Bill Koustenis
Advanced Automotive Machine
Waldorf Md

[jimmie]

Thanks Again

[Strip Poker 388]

I even run brass in the race car no antifreeze.