And don't forget that the reason for the spray of water is a compromised rear seal in the raw water pump. A rebuild is a doddle, new bearing and seal is about $50.
740 hours in my DP-SM outdrive using Mobil 1 without problems, it used to be a recommendation in the manual but not now, however Mobil 1 is almost the same price as Volvo Penta. I buy it in 25 Ltr drum as it also goes in my Landcruiser and Rav4's gear boxes and axles.
kd4pbs
I have also thought along the same as you, however if the seal is not replaced at the same time as the gimbal then there is a possibility that the extractor when inserted could damage the seal and not be noticed.
Sounds to me like a lack of cooling water, when did you last change the raw water impeller? If recently it might be corrosion or a blockage in the supply to the exhaust elbow.
I would be suspecting something wrong with the seawater pump, hoses on the wrong way or the classic extra 'O' ring.
To melt the plastic plugs in the manifolds there has been a serious lack of cooling water.
Hi Bill
My problem with The VST was that,
a) The salt water chamber was clogged up with a corrosion deposit that would not allow water flow ie no cooling.
b) The base of the fuel float chamber had rotted through from the salt water chamber allowing salt water to contaminate the fuel!
I am...
You are right to be surprised.
I had something similar, I put clear hoses from both T'stat outlets to the manifolds and could see hardly any water flow at 600 RPM however at 3000 RPM I could clearly see exhaust gas in the flow.
The water pickup tube in the lower outboard leg had been burnt...
Just a quick note, when I start my motor it idles at 650rpm the dashboard gauge remains at 10 volts, but as soon as I rev beyond 1000rpm it goes up to just over 13 volts, it has been like that for 25 seasons, so I have stopped worrying about it. :)
Well, after arranging to remove outboard leg etc. I Ran the motor again and realised that the noise had increased and was from the Circulating pump at the front. Renewed pump and all is well . :-)
Below is a recording of the noise from the rear of the engine. (admin needs to allow MP4 file)
I suspect it might be the gimbal bearing, but would like a confirmation.
Engine is 5.0 Gi PWTR with DP-SM outdrive with 725 hours.
Gimbal Bearing and UJ's greased and new bellows fitted before...
