On Thu, 21 Oct 2004 19:08:48 -0000, "Jean-Marie"
wrote:

I have seen suggested somewhere that you close the water intake if the
engine has to be cranked for a long time while it does not start or you do
not want it to start (Winterizing).

================================

Yes, the owners manual for one of my old Volvo's recommended exactly
that.

Yes I can see how that would happen if the water lift muffler outlet were
lower than the engine exhaust manifold as well as the overboard.

In my installation the engine exhaust elbow is at least a foot above the
water lift muffler and the overboard discharge is below the water lift (not
really a water lift in this instance).

The only way the water loft could fill to the level of the exhaust elbow is
if the overboard discharge were closed. If that were to happen the
compression pressure would rupture something in the exhaust system.

I still think the exhaust valve is staying open enough (when the engine is
dead cold) and during the power stroke, the piston sucks water vapor into
the cylinder. Not enough to cause a hydraulic lock but enough to show water
traces in the lub oil after a dozen or so start attempts. (no other way for
water to get into the oil in these engines since the water jacketed cylinder
is independent of the crank case, as is the water cooled head. ).

Steve
s/v Good Intentions

I seem to recall that the installation instructions state that exit from the
water lifter must go at least a foot above the waterline before exiting
the boat. Does your's do this?

Doug
s/v Callista

"Steve" wrote in message
...
Yes I can see how that would happen if the water lift muffler outlet were
lower than the engine exhaust manifold as well as the overboard.

In my installation the engine exhaust elbow is at least a foot above the
water lift muffler and the overboard discharge is below the water lift
(not
really a water lift in this instance).

The only way the water loft could fill to the level of the exhaust elbow
is
if the overboard discharge were closed. If that were to happen the
compression pressure would rupture something in the exhaust system.

I still think the exhaust valve is staying open enough (when the engine is
dead cold) and during the power stroke, the piston sucks water vapor into
the cylinder. Not enough to cause a hydraulic lock but enough to show
water
traces in the lub oil after a dozen or so start attempts. (no other way
for
water to get into the oil in these engines since the water jacketed
cylinder
is independent of the crank case, as is the water cooled head. ).

Steve
s/v Good Intentions

I seem to recall that the installation instructions state that exit from the
water lifter must go at least a foot above the waterline before exiting
the boat. Does your's do this?

Doug

you remember wrong. the instructions says the outlet from the muffler to the
transom must at first go higher than the high water mark and then downhill to a
point that is most usually and frequently above the waterline.

I think that is what I said. In any case, my exhaust does not exit the
transome.

"JAXAshby" wrote in message
...
I seem to recall that the installation instructions state that exit from
the
water lifter must go at least a foot above the waterline before exiting
the boat. Does your's do this?

Doug

you remember wrong. the instructions says the outlet from the muffler to
the
transom must at first go higher than the high water mark and then downhill
to a
point that is most usually and frequently above the waterline.

*if* that is what you said, why did you not say it?

From: "Doug Dotson" AMcom
Date: 10/21/2004 11:14 PM Eastern Daylight Time
Message-id:

I think that is what I said. In any case, my exhaust does not exit the
transome.

"JAXAshby" wrote in message
...
I seem to recall that the installation instructions state that exit from
the
water lifter must go at least a foot above the waterline before exiting
the boat. Does your's do this?

Doug

you remember wrong. the instructions says the outlet from the muffler to
the
transom must at first go higher than the high water mark and then downhill
to a
point that is most usually and frequently above the waterline.

yes, the water lift is a foot above the overboard and the engine exhaust
elbow is another 10" above that.

The exhaust elbow is a custom since the aluminum one didn't give me the
correct angle to the water lift.

Steve
s/v Good Intentions

if your engine doesn't want to start, shut the water intake valve until the
engine does start. Otherwise, you risk backflooding the engine.

From: "Steve"
Date: 10/21/2004 11:21 PM Eastern Daylight Time
Message-id:

yes, the water lift is a foot above the overboard and the engine exhaust
elbow is another 10" above that.

The exhaust elbow is a custom since the aluminum one didn't give me the
correct angle to the water lift.

Steve
s/v Good Intentions

Steve, exhaust gases ********MUST******** be present to move water from the
waterlift muffler overboard. If your engine is not starting, shut off the
water intake valve or suffer the consequences.


Yes I can see how that would happen if the water lift muffler outlet were
lower than the engine exhaust manifold as well as the overboard.

In my installation the engine exhaust elbow is at least a foot above the
water lift muffler and the overboard discharge is below the water lift (not
really a water lift in this instance).

The only way the water loft could fill to the level of the exhaust elbow is
if the overboard discharge were closed. If that were to happen the
compression pressure would rupture something in the exhaust system.

I still think the exhaust valve is staying open enough (when the engine is
dead cold) and during the power stroke, the piston sucks water vapor into
the cylinder. Not enough to cause a hydraulic lock but enough to show water
traces in the lub oil after a dozen or so start attempts. (no other way for
water to get into the oil in these engines since the water jacketed cylinder
is independent of the crank case, as is the water cooled head. ).

Steve
s/v Good Intentions

weeneyn, do be quiet. adults are talking. go stand in the corner, for you are
utterly ignorant on this subject. get used to it.

From: Wayne.B
Date: 10/21/2004 8:16 PM Eastern Daylight Time
Message-id:

On Thu, 21 Oct 2004 19:08:48 -0000, "Jean-Marie"
wrote:

I have seen suggested somewhere that you close the water intake if the
engine has to be cranked for a long time while it does not start or you do
not want it to start (Winterizing).

================================

Yes, the owners manual for one of my old Volvo's recommended exactly
that.