Have a 5.7 Merc. carbed that is starting to over heat in the 3900 rpm range,
Alpha drive. Runs fine, 165 degrees, at 3600 revs- needed to plane and and
travel at 18-23 mph. Changed the thermostat to no avail. Noticed the older
type one piece, 6 hose housing is in bad shape. Merc wants 396.00 for a
replacement. Noticed Sierra offers a stainless 4 house housing for 115.00 Can
I use it safely? How important are the houses that run to the elbows? Any
help would be appreciated.