On my 56, there are three bilge pumps in the center bilge. One centrifugal (Rule?) that sits at the bottom of the bilge (lableled Bilge #1 pump with an auto/manual type spring loaded switch on the panel), one Jabsco diaphragm pump (which is mounted up high on the platform next to the AC circulation pump although the pickup is obviously in the bottom of the bilge), powered thru a "Bilge #2 Pump" switch on the panel, and one Whale gulper mounted in the engine room, pickup at the bottom of the bilge. Both electric pumps are normally controlled thru their respective float switches in the bilge.   The float switches are staggered in height so as to allow the diaphragm pump to operate first.
I'm wondering if my pumps are wired correctly to the floats..... should the diaphram pump be the first pump to run (lower float switch)?   
Secondly, should the centrifugal pump (rule) be wired to the spring loaded auto/manual switch?
Anyone with a 54/56 with similar setup? 

This hose carries the engine fresh water coolant which should not reach the boiling point of water and therefore I would assume normal reinforced car engine coolant hose would be an adequate replacement. Hose size is 5/8" ID.

I have actually replaced this hose in this way this winter having removed and cleaned the heat exchanger. The original hose looked same the one shown in the pic and seemed to be only pvc with an external reinforcement.

I haven't run the engine in anger yet so my theory is still to be tested.

Andy
True Brew H46#32

The frig on my 44 and 49 was about 8 cubic feet.  You want the big compressor (BD50) and plate.

Joel

This is a picture (of a different engine) the return coolant hose on my 4JH2-TE. 

Is that even an ?coolant? return?  Not sure the turbo has coolant other than oil.  Still researching. 

Either way, Its end of life; beginning to leak.
Anyone know if this is a special composite/reinforced material?  It seems to me that it is both from its appearance and its function dealing with super heated coolant coming out of the turbo.

I've used black starboard over plywood and black plexi over plywood on different boats.  Only issue is getting them to bond to the plywood.  Sorry, I forget which adhesive I used, but it was probably LifeSeal.

Either is easy to cut/router.  Choice depends on the look you want. 

Joel
49#5
Rule One