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Old 21 February 2012, 03:33   #1
lightning's Avatar
Country: UK - England
Town: Marple
Make: Zodiac
Length: under 3m
Engine: Tohatsu 9.8
Join Date: Jun 2009
Posts: 604
Running in 2-stroke engine

The oil ratio during running in is given as 25-1

The engine runs fine but smokes like a tramp steamer

Hopefully after the 10 hours "running in" it will be better, when I can reduce it to 50-1

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Old 21 February 2012, 03:49   #2
Country: UK - Scotland
Boat name: Wildheart
Make: Humber/Delta Seasafe
Length: 5m +
Engine: Merc 60 Clamshell
MMSI: 235068449
Join Date: Apr 2007
Posts: 4,650
In a word - Yes!

I was doing that following a rebore / piston replacement last summmer. Also don't go too near an EPA boat - they might take offence to the oil slick...

When you are finished the 10 hrs, take the plugs out & give them a good clean. Probably also worth giving the prop a clean too so you don't get manky later. burning off what's lurking in the exhaust shouldn't take too long after that!
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