New mariner 20 4 stroke break in

keith81 · 18 May 2013, 19:42

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

yam man · 18 May 2013, 21:05

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 .

clydeoutboards · 19 May 2013, 19:57

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