33ec
New Member
- Mar 31, 2010
- 86
- Boat Info
- twin detroit 671 TI Westerbeke 11kw 1987/2002. full tower. Saturn 11' inflatable
- Engines
- Detroit 2 strokes. rebuilt
Good morning. I recently purchased a new to me boat with a pair of detroit diesels. fresh water cooled with dry turbo's . This boat has barnegat style scoop strainers on the outside of the hull and no internal strainer for the raw water pump prior to the heat exchangers. it has 3" intake lines and not a lot of flexible pipe after the thru hull valve. My challenge is how to get the anti freeze thru the raw water side. I was thinking about simply removing the zinc from the trans cooler and hooking a bucket of antifreeze to that opening while cranking the engine to allow it to be pulled thru but this is only a 3/8" opening. I am concerned about damaging the inpellar due to low flow. I would also be able to hook up an air line to blow it out but am unsure if that would get all of the water. Does anyone else have a similar set up and if so, how do you winterize the drive engine raw water system? Large internal strainers are quite expensive and I really don't need them with the type of external scoops I have in addition to adding another large item to the engine room, Ii would rather not add them.
Doug
Doug