On Oct 12, 1:06 pm, jamesgangnc wrote:
On Oct 12, 12:28 pm, Jake S wrote:





On Sep 4, 11:12 pm, Jake S wrote:

On Sep 4, 10:02 pm, trainfan1 wrote:

Jake S wrote:
On Sep 4, 9:39 am, "jamesgangnc" wrote:
It is a belt driven pump on the front of the engine. It is serviceable.

"Jake S" wrote in message

groups.com...

My son has a 2000 Four Winns with a 5.7L V8 Volvo Penta (with the dual
props) and it over heats when there is a large group of people on the
boat and under throttle. The first thing I would check is the
waterpump impeller. I read somewhere that that Volvo Penta doesn't
have one in the outdrive (as my OMC or Old Merc did) - If that is the
case - where is it and can a boat owner with mechanical ability check
it? Are there any other suggestions as to what could be causing this
problem? He bought it used earlier this year - it runs great and he
has done nothing to it.- Hide quoted text -
- Show quoted text -

Does the motor still has the traditional water pump

Yes.

Circulation pump...

on the front like

a car does? If so - there are two on the front ?

Yes.

And a raw water pump with a rubber impeller. Off to the side or below.

Rob

- Hide quoted text -

- Show quoted text -- Hide quoted text -

- Show quoted text -

Thanks to all who responded!- Hide quoted text -

- Show quoted text -

My Son replaced the impeller and cleaned out somerust buildup in one
of the entries in the thermostat housing. He said ti seemed to work -
I visited him this week and on the last day there we went out on the
boat. Sure enough - take it to full throttle and it over heats - MOST
of the time - one time it only went to the midpoint on the gauge. What
is interesting is that the performance of the boat was horrible
(accelleration was worse than my 4.3L) and full throttle RPM was only
about 4200. I have a friend with an same boat and engine but a 98
instead of a 2000 and his goes to 5500 at full throttle. I am
suspecting that the poor performance and overheating are related. Does
anyine have any idea as to what it could be?

Also, what should the top RPM be for this engine? - my 4.3 is 4800 any
idea on the timing for this engine?

Thanks to any and all who respond.- Hide quoted text -

- Show quoted text -

Something in the mid to high 4k rpm would be better. 5500 is too
high.

It is possible that the boat has a detonation issue that would cause
both a performance problem and an overheating problem. But
overheating can also be the cause of detonation. Which in turn causes
perfomance problems. So we can't tell which came first without
further work. There could also be fuel related problems.

So I would do a complete inspection of the cooling system and replace
the thermostat. Check the ignition timing with a timing light and
test run the boat with premium fuel. If the boat has a lot of lower
grade fuel in it then add octane booster and fill the rest of the way
with premium. If that doesn't fix it then start checking the fuel
system.- Hide quoted text -

- Show quoted text -

Glad you brought fuel up - does this boat REQUIRE PREMIUM fuel? My 4.3
requires it and learned while visting my son he has been using
regular. Would you know what the timing should be? THanks in advance
for your help!!

On Oct 12, 1:35 pm, Jake S wrote:
On Oct 12, 1:06 pm, jamesgangnc wrote:





On Oct 12, 12:28 pm, Jake S wrote:

On Sep 4, 11:12 pm, Jake S wrote:

On Sep 4, 10:02 pm, trainfan1 wrote:

Jake S wrote:
On Sep 4, 9:39 am, "jamesgangnc" wrote:
It is a belt driven pump on the front of the engine. It is serviceable.

"Jake S" wrote in message

groups.com...

My son has a 2000 Four Winns with a 5.7L V8 Volvo Penta (with the dual
props) and it over heats when there is a large group of people on the
boat and under throttle. The first thing I would check is the
waterpump impeller. I read somewhere that that Volvo Penta doesn't
have one in the outdrive (as my OMC or Old Merc did) - If that is the
case - where is it and can a boat owner with mechanical ability check
it? Are there any other suggestions as to what could be causing this
problem? He bought it used earlier this year - it runs great and he
has done nothing to it.- Hide quoted text -
- Show quoted text -

Does the motor still has the traditional water pump

Yes.

Circulation pump...

on the front like

a car does? If so - there are two on the front ?

Yes.

And a raw water pump with a rubber impeller. Off to the side or below.

Rob

- Hide quoted text -

- Show quoted text -- Hide quoted text -

- Show quoted text -

Thanks to all who responded!- Hide quoted text -

- Show quoted text -

My Son replaced the impeller and cleaned out somerust buildup in one
of the entries in the thermostat housing. He said ti seemed to work -
I visited him this week and on the last day there we went out on the
boat. Sure enough - take it to full throttle and it over heats - MOST
of the time - one time it only went to the midpoint on the gauge. What
is interesting is that the performance of the boat was horrible
(accelleration was worse than my 4.3L) and full throttle RPM was only
about 4200. I have a friend with an same boat and engine but a 98
instead of a 2000 and his goes to 5500 at full throttle. I am
suspecting that the poor performance and overheating are related. Does
anyine have any idea as to what it could be?

Also, what should the top RPM be for this engine? - my 4.3 is 4800 any
idea on the timing for this engine?

Thanks to any and all who respond.- Hide quoted text -

- Show quoted text -

Something in the mid to high 4k rpm would be better. 5500 is too
high.

It is possible that the boat has a detonation issue that would cause
both a performance problem and an overheating problem. But
overheating can also be the cause of detonation. Which in turn causes
perfomance problems. So we can't tell which came first without
further work. There could also be fuel related problems.

So I would do a complete inspection of the cooling system and replace
the thermostat. Check the ignition timing with a timing light and
test run the boat with premium fuel. If the boat has a lot of lower
grade fuel in it then add octane booster and fill the rest of the way
with premium. If that doesn't fix it then start checking the fuel
system.- Hide quoted text -

- Show quoted text -

Glad you brought fuel up - does this boat REQUIRE PREMIUM fuel? My 4.3
requires it and learned while visting my son he has been using
regular. Would you know what the timing should be? THanks in advance
for your help!!- Hide quoted text -

- Show quoted text -

Boats generally were slow to adapt to lower octanes. I would try the
premium and see what effect it has.

Severe detonation for repeated and/or extended periods can result in
damage. Melted piston tops, burned through head gaskets, head
warping. Bad stuff.

I don't know the timing for sure, common timing on chevy v8's is 4
btdc. If you're going to work on it I'd highly suggest a service
manual. You can get a clymers for 30 bucks or so.

On Oct 12, 11:28 am, Jake S wrote:
On Sep 4, 11:12 pm, Jake S wrote:





On Sep 4, 10:02 pm, trainfan1 wrote:

Jake S wrote:
On Sep 4, 9:39 am, "jamesgangnc" wrote:
It is a belt driven pump on the front of the engine. It is serviceable.

"Jake S" wrote in message

groups.com...

My son has a 2000 Four Winns with a 5.7L V8 Volvo Penta (with the dual
props) and it over heats when there is a large group of people on the
boat and under throttle. The first thing I would check is the
waterpump impeller. I read somewhere that that Volvo Penta doesn't
have one in the outdrive (as my OMC or Old Merc did) - If that is the
case - where is it and can a boat owner with mechanical ability check
it? Are there any other suggestions as to what could be causing this
problem? He bought it used earlier this year - it runs great and he
has done nothing to it.- Hide quoted text -
- Show quoted text -

Does the motor still has the traditional water pump

Yes.

Circulation pump...

on the front like

a car does? If so - there are two on the front ?

Yes.

And a raw water pump with a rubber impeller. Off to the side or below.

Rob

- Hide quoted text -

- Show quoted text -- Hide quoted text -

- Show quoted text -

Thanks to all who responded!- Hide quoted text -

- Show quoted text -

My Son replaced the impeller and cleaned out somerust buildup in one
of the entries in the thermostat housing. He said ti seemed to work -
I visited him this week and on the last day there we went out on the
boat. Sure enough - take it to full throttle and it over heats - MOST
of the time - one time it only went to the midpoint on the gauge. What
is interesting is that the performance of the boat was horrible
(accelleration was worse than my 4.3L) and full throttle RPM was only
about 4200. I have a friend with an same boat and engine but a 98
instead of a 2000 and his goes to 5500 at full throttle. I am
suspecting that the poor performance and overheating are related. Does
anyine have any idea as to what it could be?

Also, what should the top RPM be for this engine? - my 4.3 is 4800 any
idea on the timing for this engine?

Thanks to any and all who respond.- Hide quoted text -

- Show quoted text -

Run a compression test. you could have a bad head gasket and/or a bad
head. Odly enough my merc 3.0 in my little chris craft didn't want to
start very well, and even though it would pull 4000 rpm it was
sluggish getting there. however it didn't seem to want to overheat
according to the guages.

found out it had a burnt valve on one cylinder and a bad head gasket.
funny thing, head gaskets. proof that the previous owner over heated
it. for one, he had a delco alternator with the wrong pully (parts
store exchange) and couldn't get the belt tight SO... the water pump
was slipping, to the point of almost hand turning speed when above
idle.

over heat.

alswo my old christ craft cavilier had a sherwood remote water pump
and was wanting to run hot.

found out the problem was a loose belt. new (shorter) belt and all
worked fine.


maybe not related to your son's demise, but I'd still run a
compression test.