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Author Topic: Optimax shutting down at speed  (Read 7194 times)

Offline Eric Low

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Optimax shutting down at speed
« on: August 31, 2017, 09:02:09 AM »
The other day on Winnipesaukee I was crossing the broads with jack plate down and about 1/4 trim. It was pretty rough with wind from nw  Started to smooth out a bit as I got to a lee so started to trim......engine shut off. Fortunately started right back up. This happened before on Lake Ontario well out of sight of land. Same situation shut down when trimming up.

In both instances ran flawlessly before and after. Anyone ever see this before? 2013 opti 250
« Last Edit: August 31, 2017, 09:03:43 AM by Eric Low »

Offline frugalangler

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Re: Optimax shutting down at speed
« Reply #1 on: August 31, 2017, 11:14:39 AM »
sounds like a low voltage shutdown because the trim motor load on battery caused voltage drop - check ALL battery and other cables for any sign of corrosion, don't forget the connections under the engine cover.

I've experienced similar where the trim was wired to the same fuse as the ignition on the engine and trimming at speed caused the fuse to pop, moved the trim to a dedicated fuse and all good.

The load on a trim motor when trying to push the prop backwards (trim up) under speed (fighting push of prop) is VERY large, takes a lot of current to trim up under speed, and can frequently be over looked.
« Last Edit: August 31, 2017, 11:16:26 AM by frugalangler »
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