Mechanical engineer here, the black oxide coating on the cog needs a coat of oil to be effective. I would recommend disassembly, clean with naval jelly, and then coat with a rust inhibitor (recommend CRC-336) and reassemble.
Chris Greenwald
From: electricboats@groups.io <electricboats@groups.io> on behalf of Anton Sl-y <anton.slutsky@gmail.com>
Sent: Monday, September 12, 2022 7:00:17 AM
To: electricboats@groups.io <electricboats@groups.io>
Subject: [electricboats] Rust on pulley/belt Thunderstruck kit
Sent: Monday, September 12, 2022 7:00:17 AM
To: electricboats@groups.io <electricboats@groups.io>
Subject: [electricboats] Rust on pulley/belt Thunderstruck kit
Hello group!
Recently installed the 10kw Thunderstruck 
sailboat kit on my Cal-29. Everything works great but literally 3 days after installation got these massive rust deposits on the lower shaft pulley and belt.
Wondering if anyone might have some suggestions if I need to grease the pulley or spray it with anticorrosive?
The boat is in free water in a river. It's not the driest of boats but generally pretty dry. Not sure why the rust would kick in so soon?
TIA!
Anton
-- Best Regards,
Anton Slutsky, Ph.D.
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