Glenn,
I ran heater hose up about 18" then over about 15 ft and back down to the
water heater in the opposite hull of my cat. It works fine, but I made sure
there was no air in the line when I hooked it up by filling the entire run
with a funnel on one hose end. The water heater was slightly lower than
either engine, though.

"Glenn Ashmore" wrote in message
news:1Gzyf.8431$Dh.3554@dukeread04...
OK. The Yanmar 4JH4 is on the stringers, exhaust run to the waterlock and
raw water hose is on the strainer. Now I turned my attention to running
hoses to the water heater at the back of the engine compartment. The
instructions suggest that to avoid air traps the hoses to the heater
should be run below the level of the engine heat exchanger. BUT the inlet
and outlet for the water heater feed is on top of the pump which is at the
top front of the engine!

--
Glenn Ashmore

I'm building a 45' cutter in strip/composite. Watch my progress (or lack
there of) at: http://www.rutuonline.com
Shameless Commercial Division: http://www.spade-anchor-us.com

"Garland Gray II" wrote ...
Glenn,
I ran heater hose up about 18" then over about 15 ft and back down to the
water heater in the opposite hull of my cat. It works fine, but I made
sure there was no air in the line when I hooked it up by filling the
entire run with a funnel on one hose end. The water heater was slightly
lower than either engine, though.


That is encouraging. My installation will not be that bad. Only about 6'
to the heater. No room for an expansion tank at the high point so I may
just add a couple of bleeder valves there.

This is getting to be a real pain now that the engine is blocking the best
access to the engine compartment. I have to lay on an aft bunk and slide my
head and shoulders into the access hatch to do anything. Inevitably once I
squirm into position I find that I have the wrong size wrench!

--
Glenn Ashmore

I'm building a 45' cutter in strip/composite. Watch my progress (or lack
there of) at: http://www.rutuonline.com
Shameless Commercial Division: http://www.spade-anchor-us.com

Glenn Ashmore wrote:
"Garland Gray II" wrote ...

Glenn,
I ran heater hose up about 18" then over about 15 ft and back down to the
water heater in the opposite hull of my cat. It works fine, but I made
sure there was no air in the line when I hooked it up by filling the
entire run with a funnel on one hose end. The water heater was slightly
lower than either engine, though.



That is encouraging. My installation will not be that bad. Only about 6'
to the heater. No room for an expansion tank at the high point so I may
just add a couple of bleeder valves there.

This is getting to be a real pain now that the engine is blocking the best
access to the engine compartment. I have to lay on an aft bunk and slide my
head and shoulders into the access hatch to do anything. Inevitably once I
squirm into position I find that I have the wrong size wrench!

My Yanmar 1/2/3 GM installation manual allows you to have
the heater inlet/outlet up to 0.5m above the water pump
inlet as long as the overflow tank is installed above it,
and have a air bleeder valve at the heater.

Sorry about the constriction in your engine compartment. On
my boat I don't have a "compartment", I just lift a
mattress and the engine is there. I can almost stand up
beside it. Typical cat elbow room will make maintenance so
easy (o.k. except for Yanmar's stupid water pump impeller)

Evan Gatehouse

"Glenn Ashmore" wrote in message
news:MIWyf.8530$Dh.7045@dukeread04...
SNIP
This is getting to be a real pain now that the engine is blocking the best
access to the engine compartment. I have to lay on an aft bunk and slide
my
head and shoulders into the access hatch to do anything. Inevitably once
I
squirm into position I find that I have the wrong size wrench!


I've concluded that for such jobs one needs a thinner and younger helper.

I am beginning to envy Skip. With that center cockpit and deep bilge Flying
Pig's engine compartment is bigger than an average size stateroom. :-)

--
Glenn Ashmore

I'm building a 45' cutter in strip/composite. Watch my progress (or lack
there of) at: http://www.rutuonline.com
Shameless Commercial Division: http://www.spade-anchor-us.com

"Jim Conlin" wrote in message
. ..

"Glenn Ashmore" wrote in message
news:MIWyf.8530$Dh.7045@dukeread04...
SNIP
This is getting to be a real pain now that the engine is blocking the
best
access to the engine compartment. I have to lay on an aft bunk and slide
my
head and shoulders into the access hatch to do anything. Inevitably once
I
squirm into position I find that I have the wrong size wrench!


I've concluded that for such jobs one needs a thinner and younger helper.

"Glenn Ashmore" wrote in message
news:3Ldzf.8794$Dh.2613@dukeread04...
I am beginning to envy Skip. With that center cockpit and deep bilge
Flying Pig's engine compartment is bigger than an average size stateroom.
:-)

--
Glenn Ashmore

So, when are you coming back to enjoy them in a paroxysm of completing
projects, many of which are right on the cusp??

L8R

Skip, roomy :{)) (and returning the boat 15Feb while my PT's attending to
the Braves during spring training)

--
Morgan 461 #2
SV Flying Pig KI4MPC
http://tinyurl.com/384p2 The vessel as Tehamana, as we bought her

"Twenty years from now you will be more disappointed by the things you
didn't do than by the ones you did do. So throw off the bowlines. Sail
away from the safe harbor. Catch the trade winds in your sails. Explore.
Dream. Discover." - Mark Twain