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| Honda 50 Lower unit Crack |
| Author |
Message |
    
Roger Breunig
New member
Username: lakeguy
Post Number: 1
Registered: 02-2009
| | Posted on Thursday, February 26, 2009 - 12:19 pm: | 
|
My Honda 50(1999) has a piece of the gearcase missing(clamshell shaped) fron the back edge of the case and runds forward about 3.5"s. It is and 90 degree arc at the back edge and runs out just forward of the bearing retainer rear section. The retainer nut is cracked just behind the prop. The moter runs fine at low speeds, the propshaft part stack is tight axially and doesn't wobble. At about 5000 it makes a cavitating noise.
Any thoughts on why this happened and is it a common Honda problem?
Thanks |
JUST-IN-TIME
Senior Member
Username: justintime
Post Number: 6515
Registered: 09-2006
| | Posted on Friday, February 27, 2009 - 07:52 pm: |
|
post pics |
Gerry
Member
Username: slapsomeducttapeonit
Post Number: 8
Registered: 12-2008
| | Posted on Saturday, February 28, 2009 - 12:12 am: |
|
Yeah, what he said. Pictures.
From your description through, damage sounds like it could have been several things. Bad casting, prop hit something, handling damage.
My guess is that at 5000 RPM, the casting is expanding slighlty due to dynamic oil pressure from the shaft rotating. This results in the bearings drifting a bit more, and wobbling the shaft. But without pics, thats just a total guess.
Could also be cavitation induced by the missing piece. In which case, you could probably just smooth it out with some metal epoxy. Again, a total guess without pictures. |
joel cunningham
Member
Username: joelc
Post Number: 4
Registered: 10-2009
| | Posted on Thursday, October 15, 2009 - 11:21 pm: |
|
O'k I have got this one, for sure. Have had 4 Honda's 50 for the last 10 years all at about 4 or 5 years have had same prob. Diff. metal in lower unit causes rust and swelling. On advice of my h guy filed on inc. and I am real sure I must have it some under water object |
joel cunningham
Member
Username: joelc
Post Number: 5
Registered: 10-2009
| | Posted on Thursday, October 15, 2009 - 11:21 pm: |
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on the left side |
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