Home › Forum › Ask A Member › 80 merc 1984 dies out after 1/2 throttle › Re: 80 merc 1984 dies out after 1/2 throttle
Bill,
I would bet money it is some of the fuel delivery. EVERYONE forgets the reed blocks are horizontal & that makes for a huge problem if that system is not functioning. If a guy ran a tank overhead & fuel delivery was perfect it still would either run rich or lean without the scavaging system!
Unburned fuel is a problem with any 2 stroke. With Merc’s the reed blocks lay flat & require the scavaging system to remove the excess fuel. It is a system only Mercury has & EVERYONE is overlooking it. If the hoses are rotted or the check valves are dirty or reversed it will not run after a few minutes. It is timed with crankcase vacuum & pressures hence the check valves. I would bet it is flooding internally. It’s in the book for all to read.
Why this is not discussed is few even know it’s present. Just my opinion.