I have a boat with two yanmar
saildrives. I pulled off the raw water heat exchanger
manifold last year and found that small bits of plastic bags had been suck up the small inlets and then balloned out in the manifold, along with bits of old impellers and barnacles
. Most of the manifold intakes were covered and this was the problem of hoses blowing off because of back pressure, engines overheating
, and the muffler
burning through. I heard though that Yanmar
does not recommend raw water
strainers on diesels with sail drives. Was wondering if then I should substitute taking off the manifold once a year (I assume the manifold had never been cleaned before for a 7 year old boat) and cleaning
it or putting on raw water
filters. My engine
compartment is cramped as is.
mechanics out there know if its true that SDs really don't need a raw water
strainer? Finally, the mechanic
really took off the manifold and checked it. Anything I should watch out for when I do this myself?