1989 Yamaha 30 F 2 stroke, 3 cylinder Pilot hole shows no water flow. Overheat alarm triggering, I put the muffs on and had a look.......very limited flow out of drainage holes on lower unit, no flow out of pilot hole when throttle is engaged. Is there anything I can do to check for blockages or clogs before having to remove the lower unit. Ive never done that before and want to avoid it if I can. Please....any and all suggestions are appreciated.
