No, the Tohatsu Factory service manuals are copyrighted, so no online access.
SERVICE MANUAL : 1 & 2 CYLINDER 2-STROKES
Description
Covers all 1 & 2 cylinder 2-stroke models.
Part #: 003-21035-1
List Price (MSRP): $50.00
Year is irrelevant; You did not mention model. Likely M50B2. You need to run DFI oil, not just TCW-3. Those motors do not inject oil into the fuel rail; I mists into the air stream after lubricating the bearings. What codes are stored in the ECU? Looks like some moisture in the air compressor.
You did not mention model. Year is irrelevant. If it's an old 2-stroke, such as an M25C3, just remove the intake gasket restrictor and reset timing. If it's a 4-stroke, you need a different ECU. Luis has a complete procedure elswhere on this board.