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Old 18 May 2013, 20:42   #1
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Country: UK - England
Town: manchester
Length: 3m +
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New mariner 20 4 stroke break in

I have recently bought the above and have a couple of questions firstly Is it possible to break it in a 45gallon drum in the garden or does it need to be in gear not throttle only during break in .Also I have seen it mentioned that after break in the lower gear case oil should be replaced however the manual makes no mention of this .

Thanks for the help

Keith
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Old 18 May 2013, 22:05   #2
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Country: UK - England
Town: southampton
Boat name: hydradrive
Make: yamaha
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Engine: sterndrives
Join Date: Sep 2012
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The answer is no on the 45 gallon drum The bores will glaze .needs to be broke in through rev range so the engine will get even ware . The engine will need a 20 hr service when achieved .which will include an oil filter change an gear lube change also a general check over .
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Old 19 May 2013, 20:57   #3
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Country: UK - Scotland
Town: Glasgow
Boat name: snagglepuss
Make: Shetland
Length: 6m +
Engine: 90 hp Outboard
Join Date: Nov 2011
Posts: 562
Hi Keith

20 hours is a lot to break in and not have it on your boat! It is also still light enough to lift on and off so do you mind me asking a more basic question as to why you would want to do this?

also the first service is v v cheap so why risk the warranty?

Dave
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