engine descaling
n Take the pipe off the top of the
thermostat housing which goes to the
exhaust elbow (or, more likely, the
anti-siphon valve) and put a pipe on here,
with a Jubilee clip, back into your bucket.
n Clamp off the bypass.
n You are all set! Your circuit is complete.
n Next, we mix up our Rydlyme: one part
water to one part Rydlyme. I am informed
that the temperature of the water has no
bearing over the Rydlyme’s effectiveness.
n Start pumping, making sure to keep
an eye on your battery levels!
The circuit complete and ready to start pumping. You can pop any other bits that need
cleaning (such as your thermostat) into the bucket of Rydlyme and watch them fizz
Pump and return in the bucket, ready to gon If you have any other bits (such as
your thermostat) that need cleaning, pop
these into the bucket and watch them
fizz away and clean themselves up. I also
popped my anti-siphon valve in the bucket
as it looked as though it could do with
some TLC.n Rydlyme suggest one to four hours, so
I ran the solution for two hours one way
through the block, then reversed the
circuit and ran it for two hours back the
other way.Startling results
The results were startling. All of the
raw water passageways were clear,
and my old, grim and crusty
thermostat, which I had assumed
was beyond any hope of rescue
(I had even purchased a new one
from French Marine), came up as
good as new.
I was now content that my boat’s
raw water passageways would
be in a good condition for my
season ahead. Job done!The thermostat before treatment
The treated thermostat next to the new oneI also dropped my anti-siphon
valve into the bucketdescaling an engine