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302much
02-04-2009, 09:57 AM
Dual cooling, should i drill and tap another hole in the pump or just put a bigger hole where the existing threads are and install a tee.

also for dual outlets on the head should i use the two stock holes, or should i drill and tap a hole on the other side of the head so there is one by each cylinder?

one line into the head pipe and back out teed into the pisser and pipe
and the other overboard.

or one through head pipe, out pisser and the other teed to pisser and pipe, with a restrictor?

oh its a coffman exhaust if that matters

Any help would be appreciated.

check out the ski
sick 650? - PWCToday

for some reason the link doesn't work pwc today, vintage skis, sick 650

madscientist
02-04-2009, 12:41 PM
drill and tap a new 1.

use the old pipe drain outlet as your line through the hull

your choice will be 1 to the motor, 1 to the pipe

or 2 through the motor ( more work ) but true dual cooling