5.0 mercruiser running hot

[huntingdeer]

1987 mercuiser 5.0
replaced water pump in foot and thermostat.i pulled hose off near the other water pump and this is what i found..... what gives? i got everything fixed but this problem.and btw it was attached to the water hose and motor running.

 

[huntingdeer]

Re: 5.0 mercruiser running hot

and in that pic their is no thermostat.i took it out.

 

[Bondo]

Re: 5.0 mercruiser running hot

Ayuh,.... Follow the water flow, insteada jumpin' ahead of it,...

Was the old impeller intact,..??
Do ya have power steerin',..??
Pull the hose from the drive, on the other side of the t-stat housin', 'n see if waters comin' in,...

 

[Scott Danforth]

Re: 5.0 mercruiser running hot

did you put the key back in the impeller in the raw water pump?

you have a blockage between the T-stat housing and the water inlet ports on the leg

 

[huntingdeer]

Re: 5.0 mercruiser running hot

did you put the key back in the impeller in the raw water pump?

you have a blockage between the T-stat housing and the water inlet ports on the leg

ok i pulled one of the hose on the thermostat and ran it. it is getting plenty of water. yes power steering. yes i put the kkey back in it and the impeller was wore out. how do i know if the other pump is bad?

 

[Bondo]

Re: 5.0 mercruiser running hot

ok i pulled one of the hose on the thermostat and ran it. it is getting plenty of water. yes power steering. yes i put the kkey back in it and the impeller was wore out. how do i know if the other pump is bad?

Ayuh,.... By yer description, it Ain't gettin' no water to pump,... the hose in yer hand, Feeds the circulatin' pump,...

The t-stat housin' must be plugged if yer gettin' water on the other side of it,...

 

[huntingdeer]

Re: 5.0 mercruiser running hot

Ayuh,.... By yer description, it Ain't gettin' no water to pump,... the hose in yer hand, Feeds the circulatin' pump,...

The t-stat housin' must be plugged if yer gettin' water on the other side of it,...

ok maybe i did not weight long enough for the water to make it that far.it is rushing out now.i pulled this hose off and water was slowly coming out and exhaust was coming out of the hose? where does the water exit the motor at?

 

[Scott Danforth]

Re: 5.0 mercruiser running hot

water exits the exhaust

 

[huntingdeer]

Re: 5.0 mercruiser running hot

water exits the exhaust

i know that but im trying to understand like where and what is wrong with my boat.

 

[Bondo]

Re: 5.0 mercruiser running hot

i know that but im trying to understand like where and what is wrong with my boat.

Ayuh,.... There are flow charts in the factory manuals, found in Don'S Adults Only section,....

Just follow the Mercruiser links,...

 

[Scott Danforth]

Re: 5.0 mercruiser running hot

if your too lazy to look

generic water flow in an Alpha 1 without a heat exchanger:
from the inlet strainer, the water travels up the casting to the raw water pump. from there it is pressureized. It then flows to the connection at the gimble, from there it travels to the inside the boat and is picked up by the line to the power steering cooler. This is the first major strainer of debris. the raw water flows thru the power steering cooler to the thermostat housing. from the thermostat housing, the water flow is split, half going directly to the exhaust manifolds, then up thru the risers and out the exhaust, the other half joins the water circulating within the block. once it exits the block, it goes thru the exhaust manifolds and thru the risers and out the exhaust.

However for the specific flow path of your motor, look up the appropriate motor in the manuals that Bondo pointed you towards.

 

[huntingdeer]

Re: 5.0 mercruiser running hot

if your too lazy to look

generic water flow in an Alpha 1 without a heat exchanger:
from the inlet strainer, the water travels up the casting to the raw water pump. from there it is pressureized. It then flows to the connection at the gimble, from there it travels to the inside the boat and is picked up by the line to the power steering cooler. This is the first major strainer of debris. the raw water flows thru the power steering cooler to the thermostat housing. from the thermostat housing, the water flow is split, half going directly to the exhaust manifolds, then up thru the risers and out the exhaust, the other half joins the water circulating within the block. once it exits the block, it goes thru the exhaust manifolds and thru the risers and out the exhaust.

However for the specific flow path of your motor, look up the appropriate motor in the manuals that Bondo pointed you towards.

Look here buddy I did not ask for rudeness.how am I going to look it up if I don't have a book to look it up.i fixed that problem.. Thanks

 

[Scott Danforth]

Re: 5.0 mercruiser running hot

by looking up the factory manual as stated by Bondo

Ayuh,.... There are flow charts in the factory manuals, found in Don'S Adults Only section,....

Just follow the Mercruiser links,...