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Engine Destruction from water

 
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Kjell Martin

External


Since: Aug 27, 2004
Posts: 2



(Msg. 1) Posted: Sat Nov 13, 2004 7:12 pm
Post subject: Engine Destruction from water
Archived from groups: rec>sport>jetski (more info?)

How many people have had engine damage or destruction from water?
How many from rolling it or getting the engine compartment filled with
water?
How many from towing the jetski?
How many from unknown causes but water was the supposed reason?

I just got my jetski back after having the engine rebuilt. I put a water
sensor alarm in the intake manifold. The sensor detected water after pulling
the jetski from the water and sitting on the boat ramp with the engine
purging remaining water. Just for clarification, the jetski was out of the
water when the alarm detected water in the intake manifold. The jetski never
rolled since the engine was rebuilt; it was on its first half hour ride.
After 24 hours out of the bay, the sensor still shows water in the intake
manifold. The access to the drain plug on the engine is severely limited
(have to remove all sorts of parts to get to it).

I figure I'll have to externally heat up the intake manifold since I'm not
prepared to remove all the pieces just to get to the drain plug. I figure
too low of heat will only increase engine corrosion if any is to occur. I do
want to clear the water out even if it is minute; I'd like to dry it so that
the sensor picks up the next occurrence.

Since I'm not the only that has probably experienced this but never knew it,
I'm wondering how many jetskis have died from unknown reasons for water
uptake.

I'm not quite ready to defame the manufacturer yet. It all depends on how
they respond.

I'll be adding a bilge pump and other detection devices to prove to the
manufacturer that its a design flaw that caused the initial problem.

If you've had a problem with your jetski engine due to water ingestion I'd
like to hear about your problem.

Kjell

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crosscr

External


Since: Jun 24, 2003
Posts: 17



(Msg. 2) Posted: Sun Nov 14, 2004 12:40 pm
Post subject: Re: Engine Destruction from water [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

I think the whole water ingestion excuse for a blown engine is overused and
overrated,especially by dealers and manufacturers. I ride stand-up and get
water in the engine on a regular basis when doing sub and other things like
that. When I do suck in a little water I just keep the throttle pinned until
the engine clears up and the keep on riding with no problems. HOWEVER if you
get too much water while it is running you get hydro and a bent rod so I
guess the engine failure is due to water. I have filled an engine with water
on several occasions, in both my standup and wife's sit down, and I just
pull the spark plugs, pump out the water , get the engine running again and
ride it for a while to dry it out and all is fine.I guess if you don't leave
water in the engine for very long no permanent damage is done. I have heard
some say that when you get water in an engine it accelerates wear due to oil
temporarily being washed away and that is probably true but have no idea
what effect that has on engine life. I don't claim to be an expert but
these are just my experiences over the last 15 years of riding and racing,
Robert


"Kjell Martin" <kjellmartin DeleteThis @cox.net> wrote in message
news:oazld.93448$bk1.37938@fed1read05...
 > How many people have had engine damage or destruction from water?
 > How many from rolling it or getting the engine compartment filled with
 > water?
 > How many from towing the jetski?
 > How many from unknown causes but water was the supposed reason?
 >
 > I just got my jetski back after having the engine rebuilt. I put a water
 > sensor alarm in the intake manifold. The sensor detected water after
 > pulling
 > the jetski from the water and sitting on the boat ramp with the engine
 > purging remaining water. Just for clarification, the jetski was out of the
 > water when the alarm detected water in the intake manifold. The jetski
 > never
 > rolled since the engine was rebuilt; it was on its first half hour ride.
 > After 24 hours out of the bay, the sensor still shows water in the intake
 > manifold. The access to the drain plug on the engine is severely limited
 > (have to remove all sorts of parts to get to it).
 >
 > I figure I'll have to externally heat up the intake manifold since I'm not
 > prepared to remove all the pieces just to get to the drain plug. I figure
 > too low of heat will only increase engine corrosion if any is to occur. I
 > do
 > want to clear the water out even if it is minute; I'd like to dry it so
 > that
 > the sensor picks up the next occurrence.
 >
 > Since I'm not the only that has probably experienced this but never knew
 > it,
 > I'm wondering how many jetskis have died from unknown reasons for water
 > uptake.
 >
 > I'm not quite ready to defame the manufacturer yet. It all depends on how
 > they respond.
 >
 > I'll be adding a bilge pump and other detection devices to prove to the
 > manufacturer that its a design flaw that caused the initial problem.
 >
 > If you've had a problem with your jetski engine due to water ingestion I'd
 > like to hear about your problem.
 >
 > Kjell
 >
 ><!-- ~MESSAGE_AFTER~ -->

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Tom Howlin

External


Since: Jun 21, 2003
Posts: 274



(Msg. 3) Posted: Sun Nov 14, 2004 10:30 pm
Post subject: Re: Engine Destruction from water [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

First, most water ingestion is not from the intake manifold, it is from
the exhaust system and the ski being righted incorrectly. Water
ingestion through the intake system happens when you fill the ski with
water or you've got some type of pressure leak (ala the infamous SD 951
motor in its debut year where the exhaust gasket was leaking, shooting
cooling water into the intake system). If you are confident in your
sensing system (how does it differentiate from the air/fuel mixture and
water?), then you should be able to ride the ski with the seat off and
find the source of the water. Fact of the matter is, water does not
compress and once it's in the engine, something has to give, usually the
crank or a rod if you get it started. Usually hydro lock will
demonstrate itself when you try and start the ski and you can
immediately clear the engine with the plugs out. The starter is not
strong enough to do any damage to the engine.

Tom

Kjell Martin wrote:
 > How many people have had engine damage or destruction from water?
 > How many from rolling it or getting the engine compartment filled with
 > water?
 > How many from towing the jetski?
 > How many from unknown causes but water was the supposed reason?
 >
 > I just got my jetski back after having the engine rebuilt. I put a water
 > sensor alarm in the intake manifold. The sensor detected water after pulling
 > the jetski from the water and sitting on the boat ramp with the engine
 > purging remaining water. Just for clarification, the jetski was out of the
 > water when the alarm detected water in the intake manifold. The jetski never
 > rolled since the engine was rebuilt; it was on its first half hour ride.
 > After 24 hours out of the bay, the sensor still shows water in the intake
 > manifold. The access to the drain plug on the engine is severely limited
 > (have to remove all sorts of parts to get to it).
 >
 > I figure I'll have to externally heat up the intake manifold since I'm not
 > prepared to remove all the pieces just to get to the drain plug. I figure
 > too low of heat will only increase engine corrosion if any is to occur. I do
 > want to clear the water out even if it is minute; I'd like to dry it so that
 > the sensor picks up the next occurrence.
 >
 > Since I'm not the only that has probably experienced this but never knew it,
 > I'm wondering how many jetskis have died from unknown reasons for water
 > uptake.
 >
 > I'm not quite ready to defame the manufacturer yet. It all depends on how
 > they respond.
 >
 > I'll be adding a bilge pump and other detection devices to prove to the
 > manufacturer that its a design flaw that caused the initial problem.
 >
 > If you've had a problem with your jetski engine due to water ingestion I'd
 > like to hear about your problem.
 >
 > Kjell
 >
 ><!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: Engine Destruction from water 
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