RubberDuckeeToo2
Active Member
- Oct 21, 2006
- 472
- Boat Info
- '98 370 Sundancer
'97 SeaDoo Speedster 14'
- Engines
- 7.4 Mercuisers
Hello All you 370 owners,
I need to know if there are any zinks used in the engines, generator and A/C units. My engines are closed fresh water (antifreeze) engines. If there are any used can you tell me what sizes I need and where they are located. I am also needing to flush out / descale the raw water systems. What is best to use and how is it applied.
Thank you all for your expertise...
Barry
When I got my boat, I asked the exact same questions. I found out that there are no zincs in the engines or AC units, but there is a zinc in the generator. You will to crawl way back near the STBD exhaust and locate the heat exchanger on the generator. (It is at the bottom of the fan belt side of the engine.) There is a pencil zinc at the bottom of the heat exchanger that you can unbolt and change. Only zinc I could find in 8+ years owning my boat.
As far as flushing out the raw water, we've devised a system modeled after the old Thoroflush. It is essentially a ballcock shutoff drilled through the top of the Perko cap on the sea strainers. Then after closing off the intakes, we attach a hose to the flush system and feed a mix of the pink antifreeze and SaltAway until we see pink coming out of the exhaust ports on the hull. Then shut the engines down and you're done. You'll be surprised at the crap that comes out in the spring when you re-start the engines!
Gene