I have searched for about 2 hours and not found an exact match to what I have occurring so creating a new topic, sorry if this is a repeat.
Just purchased a boat that had the above motor (84 Mercury 50 Hp EL 6485882). Previous owner showed it fired and also advised that the impeller was probably shot as no water was being discharged.
This is my first boat just FYI so be gentle lol.
Got the motor tore apart and took the lower foot off following YouTube videos and a service PDF manual I found. Came apart easily but as I dropped the lower foot the gray insert (want to say it is the reverse lockout cam) fell off, no damage but I think it stuck to the upper spline and once the lower foot was down gravity took over, most of the parts on this 84 appear to be original and everything was a PITA to remove so don't think much work has been done since factory. Put it to the side opened the water pump, impeller had ONE fin left on it, but no wear or damage to the pump housing, replaced impeller and put the unit back together. Now for the record I am 100% sure the motor was in neutral when the lower foot was dropped, one of the guys helping me had been drinking and in the course of us trying to line the spline back up with the lockout it got moved into all 3 positions, but finally slid in.
Put muffs on and started the boat. Fired up fine cranked the gear SLOWLY and barely into each gear (forward neutral reverse) and in all three prop turned. Shut down and awaited the next day. Took it out to the lake jumped in and babied it (about 50% WOT) for the first 10/15 min no problems and impeller worked great. Went to WOT and things were still fine. After about 10 minutes of WOT all of a sudden it was like the prop went to neutral RPM went up and I slid the throttle quickly back to N. Breathed a second and slowly worked the throttle back up. Through 75% everything was fine, as soon as I tried to go higher prop would kick to neutral and idle up. Went back to N and worked through Reverse all the way to WOT and no issues, it is only with forward WOT. Got it back to shore (no thanks to the 35+ MPH winds) got it back on the trailer and home. Dropped the gear oil (which I changed the night before with the impeller) and no metal shavings, no water, oil still pristine so I don't think it is the foot failing. Is it possible the Lockout/Spline is not in alignment?
Again this is my first boat, the guy I was with fishes from boats but has no boat repair experience so was not of much help so figured why not come to the #1 rated place on Google, plus where I got a lot of my info on impeller repair.
Just purchased a boat that had the above motor (84 Mercury 50 Hp EL 6485882). Previous owner showed it fired and also advised that the impeller was probably shot as no water was being discharged.
This is my first boat just FYI so be gentle lol.
Got the motor tore apart and took the lower foot off following YouTube videos and a service PDF manual I found. Came apart easily but as I dropped the lower foot the gray insert (want to say it is the reverse lockout cam) fell off, no damage but I think it stuck to the upper spline and once the lower foot was down gravity took over, most of the parts on this 84 appear to be original and everything was a PITA to remove so don't think much work has been done since factory. Put it to the side opened the water pump, impeller had ONE fin left on it, but no wear or damage to the pump housing, replaced impeller and put the unit back together. Now for the record I am 100% sure the motor was in neutral when the lower foot was dropped, one of the guys helping me had been drinking and in the course of us trying to line the spline back up with the lockout it got moved into all 3 positions, but finally slid in.
Put muffs on and started the boat. Fired up fine cranked the gear SLOWLY and barely into each gear (forward neutral reverse) and in all three prop turned. Shut down and awaited the next day. Took it out to the lake jumped in and babied it (about 50% WOT) for the first 10/15 min no problems and impeller worked great. Went to WOT and things were still fine. After about 10 minutes of WOT all of a sudden it was like the prop went to neutral RPM went up and I slid the throttle quickly back to N. Breathed a second and slowly worked the throttle back up. Through 75% everything was fine, as soon as I tried to go higher prop would kick to neutral and idle up. Went back to N and worked through Reverse all the way to WOT and no issues, it is only with forward WOT. Got it back to shore (no thanks to the 35+ MPH winds) got it back on the trailer and home. Dropped the gear oil (which I changed the night before with the impeller) and no metal shavings, no water, oil still pristine so I don't think it is the foot failing. Is it possible the Lockout/Spline is not in alignment?
Again this is my first boat, the guy I was with fishes from boats but has no boat repair experience so was not of much help so figured why not come to the #1 rated place on Google, plus where I got a lot of my info on impeller repair.
