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Old 24 September 2009, 16:09   #11
Locozodiac's Avatar
Country: Other
Town: Lima-Peru
Boat name: Nautile
Make: Sea Rider Boats
Length: 4m +
Engine: Tohatsu 18 /30 HP
Join Date: Sep 2007
Posts: 1,706
Originally Posted by codprawn View Post
Many do - it all depends what country you are in. It is for environmental reasons rather than anything else!!!
We have imported modern 2 strokes Mariner/Tohatsu engines from USA, Panama, Japan and all their manuals stated 50:1 ratio, so for this brand, the geographical / environmental location is not an issue for going 100:1. For the moment, will stick with usual 50:1 untill there is a factory bulletin specifying so. Consult your owners manual for your 2 strokes engine brand before going 100:1 or repent forever for experimenting.

Happy Sibbing

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Old 26 September 2009, 12:33   #12
phillnjack's Avatar
Country: UK - England
Town: slough
Boat name: not named yet
Make: Orkney Dory 4 metre
Length: 4m +
Engine: outboard evinrude 60
Join Date: Sep 2009
Posts: 80
Many yamaha's of the 1970's and 1980's had 100 to 1 printed on the side of the engines
just below the hoods in white letters.

To be honest i think 100 -1 is asking for a meltdown if running for long periods.

personaly i would stick to 50-1, and use a good quality 2stroke oil.


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