496 HO - Overheat and High water PSI
08-02-2020, 01:54 PM
#1
496 HO - Overheat and High water PSI
Hey all, fighting a gremlin in my 496HO.
She is running super high water pressure, and when idling, going slow, she will overheat. It also will build temperature and the pressure is off the charts on the garden hose. I don't have to flush through the drive. At idle it is running around 15psi (way too high) the pressure has gotten worse since I've done everything below. I am also thinking the high pressure is related to the overheat?
I have the Hardin upgraded sea water pumps, I just replaced the wear plates and impeller. I changed all the temperature senders and sensors, I installed the high flow thermostat from CP, I thought I may have had the Bravoitis issue so I changed that hose as well. I pulled the heat exchanger and cleaned, I pulled the power steering cooler and cleaned. I can't get to the oil cooler easily but thought I did a decent job of backflushing. Maybe this is my issue? But i don't know. I have the EMI thunder exhaust setup for the 496.
I am completely baffled with this any input is greatly appreciated. Thank you!
She is running super high water pressure, and when idling, going slow, she will overheat. It also will build temperature and the pressure is off the charts on the garden hose. I don't have to flush through the drive. At idle it is running around 15psi (way too high) the pressure has gotten worse since I've done everything below. I am also thinking the high pressure is related to the overheat?
I have the Hardin upgraded sea water pumps, I just replaced the wear plates and impeller. I changed all the temperature senders and sensors, I installed the high flow thermostat from CP, I thought I may have had the Bravoitis issue so I changed that hose as well. I pulled the heat exchanger and cleaned, I pulled the power steering cooler and cleaned. I can't get to the oil cooler easily but thought I did a decent job of backflushing. Maybe this is my issue? But i don't know. I have the EMI thunder exhaust setup for the 496.
I am completely baffled with this any input is greatly appreciated. Thank you!
08-02-2020, 03:44 PM
#2
Registered
Check your oil cooler
08-02-2020, 05:13 PM
#3
Registered
iTrader: (1)
Water builds pressure only if there is a restriction. The more restriction the more pressure, less get less pressure.
Its not Bravoits because that would cause less pressure.
Is motor thru hull or thru the prop?
If thru the prop, which drive and have you checked if the water shutters have broken off?
Where is the sensor located and assuming electric gauge?
Its not Bravoits because that would cause less pressure.
Is motor thru hull or thru the prop?
If thru the prop, which drive and have you checked if the water shutters have broken off?
Where is the sensor located and assuming electric gauge?
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mike tkach (08-03-2020)
VIP Member
08-03-2020, 05:46 PM
#6
Registered
08-04-2020, 09:13 AM
#8
08-04-2020, 09:14 AM
#9
Water builds pressure only if there is a restriction. The more restriction the more pressure, less get less pressure.
Its not Bravoits because that would cause less pressure.
Is motor thru hull or thru the prop?
If thru the prop, which drive and have you checked if the water shutters have broken off?
Where is the sensor located and assuming electric gauge?
Its not Bravoits because that would cause less pressure.
Is motor thru hull or thru the prop?
If thru the prop, which drive and have you checked if the water shutters have broken off?
Where is the sensor located and assuming electric gauge?
