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Old 03-22-2016, 05:10 PM   #1
City: Hampton, va
Country: USA
Vessel Name: Didi Mau
Vessel Model: 2003 Ocean Alexander 456
Join Date: Jul 2015
Posts: 937
Can I free wheel?

The boat I am buying has ZF 220 A transmissions. Can anyone tell me whether they can freewheel, or do I need to lock them in place, should I find myself needing to run on one engine?


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Old 03-22-2016, 06:02 PM   #2
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City: Brisbane
Country: Australia
Vessel Name: Insequent
Vessel Model: Ocean Alexander 50 Mk I
Join Date: Mar 2012
Posts: 2,359
Check with a dealer for those transmissions. The issues are oil circulation in the gearbox and for some, water to the shaft bearing.

For my Twin Disc the advice was to start the engine every few hours if possible and run for just a short while (minutes). In an emergency I would run for what ever time needed but would not be going that fast.

If your ZF's need to be locked then It might be worthwhile installing a shaft locking system. But avoid if possible - free-wheeling props normally create less drag.

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Old 03-22-2016, 08:19 PM   #3
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City: Cape Cod
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Vessel Name: Slip Aweigh
Vessel Model: Prairie 29
Join Date: Oct 2013
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It should be stated in the manual. I don't know your particular gears, and whether they have an 'oil slinger' of pumped lubrication. The manual should be the go to place to find this info.
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