yamaha . no spark!

hi there , im new on here and could do with some advice regarding my yamaha outboard . ive recently purchased a boat with a 50hp yam outboard . the year of wich is unknown , i was informed by the previuse owner that the stator coils had failed resulting in a no spark situation .. however ive had the whole stator plate sent of to be tested and its come back with no faults.. i was wondering if anybody had an idea of where to look next ?? . also can you help me with the year of the engine . the tag reads as follows.. 50de . 6h5 , l320290 .

any advice would be greatfully recieved.. as altho im ok with spanners . ive never had anything to do with outboard motor,s .. and of course im keen as janeen to get my new boat in the water ..

cheers in advance mike

Re: yamaha . no spark!

its a 3 cylinder 2 stroker . with a blue cover with electric written on it ,,

view linky here .. http://www.classicglastron.com/phpbb/viewtopic.php?f=20&t=1601

nice one ..