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1997 225 OceanRunner lower unit

D

david dearmore

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I just had my lower unit rebui

I just had my lower unit rebuilt and have put 10 hours on the "new" unit and it just ate up my pinion gear again. Any suggestions? I am to the point of selling my motor and starting over. Pleae let me know your thoughts.
Thanks
 
"Sorry, I got you beat. I hav

"Sorry, I got you beat. I have one that lasted less than 5 hours after a rebuild. (Hard to find a competent marine mechanic.) I switched to a used lower unit. Cost less than $200, still going strong. (1989 225HP) Try Ebay"
 
"There may be several reasons

"There may be several reasons for the break down, however it may be possible that the mech missed the reason for the first breakdown.
There are two 'normal reasons for theese boxes to break down with 'pinion failure'.
1:Running with an SST prop and hitting solid ground hard enough to damage the prop. This may result in a 'hidden' crack in one of the pinion teeth that after some hours fails and breakes. One tooth gone - soon the rest.
2:The second 'common' reson that funny eenough happends short after service of lower unit is that in some way the vertical movement of the driveshaft is restricted/limmited. It may be some grease on top of the driveshaft, dirt in the cranckshaft splines or similar. What happends is that the driveshaft assy is pushed down and eliminating/limmiting the gear play. Does not take long to kill the pinion, perhaps some 10hrs!
Theese boxes are quite easy to overhaul, but there are some trick that are not in the manual, but quite usefull to know.
To me it sound that Your mec has a 'warranty'case on his hands."
 
"Sounds like the preload on th

"Sounds like the preload on the gear set was not correct when it was assembled. There are shims behind the bearings for proper loading on the gears. If this preload is not correct the pinion gear can either ride to high or to low in the forward and reverse gears. Either will cause the gear set to fail. If you did not hit anything and can prove this then I'd try and make the person that did the repair fix the unit at thier cost. Of course this will not be an easy thing to do if the person will not own up to the fact that they did a poor job of repairing the unit. It also would be a good idea to check for water in the oil. If you do find that water is in the oil check that you didn't get some fishing line in the prop seal. If you did then the guy is kind of off the hook since he has no control over something like that. If there is water in the oil and there is no sign of damage to the prop seal then the water could be getting in from the water pump,driveshaft or shifter seals. In this case it would be safe to say that the builder is at fault. If you received a bill with the parts used in the repair check and see if the bearings and all of the gears were replaced. If only one gear was replaced this could also cause a problem. A gear set should always be replaced as a set. Bearings should always be replaced as well."
 
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