Courtney the Dancer
Join Date: Nov 2000
Location: San Juan Islands., WA, USA
Thanked 32 Times in 31 Posts
Rep Power: 20
Re: Winterize raw water cooled Volvo?
Just run a gallon or two of RV antifreeze through the engine. Close raw water sea **** and open filter, have someone start the engine and when it fires pour the antifreeze in as fast as it will take it. Shut off when you can see pink coming out with the exhaust. I generally don't bother unless I know the air temp is going to get below about 25F and stay there for awhile. Fresh water will obviously freeze at a higher temp than seawater so unless you have a heater going you might want to be a wee bit more cautious.
Use a biocide in the fuel (Biobor?) and I use Stanadyne to raise the cetane for faster starts in cold weather (actually use it all year, good lube for injectors).
SV Laurie Anne
1988 Brewer 40 Pilothouse