Originally Posted by ranger42c
I'm "mid-project" in that I've just finished flushing
(descaling) our starboard engine
. Haven't evaluated results yet; we'll do that when we run the boat this weekend.
The three most common commercial
products (that I know of) are Rydlyme, Barnacle Buster, and Triton Green something-or-other. I used Rydlyme.
Pumped the stuff in through a flush valve between that seacock and the sea strainer, then through the fuel
cooler, aftercooler, gear
cooler, and heat exchanger
. Capture for recirculation was from the discharge hose that leads from heat exchanger
to exhaust elbow
pump impeller has to be out of the way; I was due for replacement, anyway, so that was no hardship. The stuff is said to be OK for engine
zincs when diluted to working strength; I didn't see any serious impact on existing zincs, but I was due for checking/replacing those, too.
I can't tell whether raw water
flow has improved or not; might have. I'll get an operating temperature read-out -- for comparison to previous, and comparison to the as-yet-un-flushed port engine -- before deciding whether it was worth the effort. Or worth the effort doing it the way I did.
Follow-up to this: a) the recently flushed engine is running at about 1-2°F lower than the unflushed engine, and b) I didn't do it right.
I remembered this morning that I forgot to pinch off the feed to the dripless shaft seal
... so most of the flush, they way I did it, was likely not as effective as it could have been.
Note to self: remember to re-read notes to self.