Alright well im assuming its the carbs but I just want to make sure. I have a 40 Yamaha and its really hard to start but runs pretty well when started. Its a manual pull 2 cyclinder daul carb and she wears me out after about 15 pulls. The only way i can seem to get it started is to hold the trottle on the tiller wide open and just pull the cord till my arms get sore. Id say compression but shes got alot of it... So im thinking shitty gas or dirty carbs... But maybe im missing something and it could be really simple. Any one have any suggestions? She'll soon be meeting my Chrysler 105 at the bottom of the lake if i dont figure this out.