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BF225 - cracked bearing?

brettmarl

brettmarl

Regular Contributor
Doing a routine water pump swap on lower unit. Am I looking at a crack in the bearing?

Is this a nightmare to replace?

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Lower unit must come apart to replace that bearing.-----Not normal for that to happen.----So everything needs to be looked at in there.----Always used good oil and the correct amount in there?
 
racerone said:
Lower unit must come apart to replace that bearing.-----Not normal for that to happen.----So everything needs to be looked at in there.----Always used good oil and the correct amount in there?
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Yeah - this motor only has 750 hrs. Replace lower unit oil every 100hrs with engine oil. The oil almost always comes out blue - like it went in. This was first time it came out dark.
 
Anyone know how difficult it is to take the drive shaft out and replace that bearing and special tools needed?

I watched Captain Sean's video on doing the seals and he pull the propellor shaft and shift shaft but not the drive shaft. My Starboard has 1200 hrs and I should probably swap that bearing and do all seals there too.


Looking down - it looks like the bearings are held in with some locking-collar with internal teeth?
 
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Love to know if anyone has pulled this shaft. Doesn't look too bad, from the manual... looks like I need 64mm Lock Nut Tool 07916-MB00002 to get the locknut out/in and Shaft Holder 07SPB-ZW10200 to stop shaft rotating when undoing the pinion nut.

At a minimum I could pull the top (cracked) roller bearing out easily and replace with new using the existing race but assume it would be better to extract both bearings and races and replace them; which I *think* I can do with a standard bearing extractor.

Also - confirmed it's a crack - I can feel it with a pick and it goes around the corner on to the other face.
 
Looking at the bearing part - I might be thinking of this wrong... I was assuming these were two bearings/race stacked on each other, but if the photo is right, it looks like a single assembly - so probably all needs to be pulled out in one, vs replace the top bearing.

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William01 said:
Suggest you get a genuine Honda service manual, should answer all your questions.
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I have the shop manual... but it's quite hard to interpret as it covers full disassembly of the lower unit and assumes a full rebuild; so quickly gets into the weeds of shimming and lash etc. I'm hoping someone here has some experience with doing that and can comment on it a more surgical extraction / replacement of this bearing can be done.
 
racerone said:
Are you hoping to pull these bearings out without removing the driveshaft??
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I was, but I can see now that's not really possible. I was reading it as two standard roller bearings in opposing directions. Similar to lets say a trailer bearing. From what I see there is a tiny fracture forming on the roller case holder that I suspect is a manufacturing defect - seems like a weird place for a crack to form otherwise. My hope was to pull the retaining nut up top - the top bearing will come out without removing the shaft and I could very carefully inspect the race - and assuming it's in pristine condition - drop a replacement upper bearing in.

But now I see it as a single bearing and that cracked roller is probably interference fit on the shaft - so shaft has to come out. From what I read in the manual - I *think* this means I just have to worry about the pinion shim as I wouldn't disturb any of the lower spacing.

I'll order a bearing and look at the part to understand it better before deciding if it's outside my skills & tools ;)



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