93 Yamaha lower unit installed last season ran fine 2014 and up until this month from April 2015....then seemed to start slipping...finally lost thrust completely in fwd and reverse? Seems to shift F N R but can turn prop manually in both directions in gear? When out of the water in gear prop seems to turn F and R but in water, no thrust? We thought at first it might be spun prop, but when we checked and found we could turn in gear both directions without locking, we knew it was something in the unit...maybe clutch dogs? There is no grinding noise shifting in F N R ? Water pump seems to be pumping ok and engine runs ok...but just before the gears slipped, it started overheating all alert warnings came on...oil to engine was fine, water pump seemed to be pumping??? What do you think the problem may be?
Thanks
Thanks
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