Does anyone out there know of any cleaning agent that could be used to clean the water ways inside my yam b2 outboard.I have checked the impellor and it is fine the tube from the impellor to the power head was blocked but I cleaned this out.Alas water only 
trickles from the outlet when the engine is running.Any suggestions would be appreciated.
trickles from the outlet when the engine is running.Any suggestions would be appreciated.