Mercury Outboard racing part

[alanaker]

Just finished water cooling this filler block. Can't see all the work, but I milled trenches down the sides, added cross holes, made cover plates & pipe fitting ports, then welded it all up leak tight. This filler block connects the 2 stroke exhaust ports to the exhaust megaphones. Supposed to add a few H.P.to the 44 cube motor. Now I know why more people don't do this... took a couple solid days of work. Now I'm scrambling to get the motor together for October 21/22 racing.