[PSUBS-MAILIST] Minn Kotta 101 - Thruster Reliability

[Alan James via Personal_Submersibles]

Cliff,I don't think brushed motors are the way to go.The brushes can contaminate the oil & lift due to the centrifugal force of the oil. And they are less efficient than brushless motors. Also the 101s have that double o-ring seal system, that means one of the o-rings will fail when over 30ft or so.A descent brushless option with a ceramic mechanical seal and silicone compensation would be a big improvement.I bought some of the Shell Morlina some years ago.  An industrial chemist advised me it was low in aromatics and less likely to dissolve plastics than other options. I believe it was used to lubricate high speed spindles etc.It still had an effect on plastics.Alan 
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  On Sat, 29 Jul 2023 at 12:42 pm, Cliff Redus via Personal_Submersibles<personal_submersibles at psubs.org> wrote:   _______________________________________________
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