03 Johnson 9.9 four stroke - engine oil weight?

Bagock

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Apr 16, 2014
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Short time lurker, first time poster.

I've ordered a service manual for my engine, but it'll take a week or two to arrive and I can't find decent info online for the 2002+ Johnsons.

I have been able to track down the oil filter (thanks to this site), but I was hoping someone could confirm the weight I should be using and if I should bother switching over to synthetic.

Any help / guidance is much appreciated...feeling blind without a service manual.
 
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