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Old 24 July 2016, 16:28   #1
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Repair advice

Sod's law has hit again, just took our new RIB out (Honda 225) and struck a rock coming in to harbour. Engine bounced up and on inspection we have bent the propshaft slightly, bent the stainless prop, lost a good section of the fin and lost the nose cone that was fitted.
Can anyone recommend a place to get this fixed preferably near Brighton area please and any suggestions (apart from not hitting rocks)

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Old 24 July 2016, 16:47   #2
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Did you know that the bottom of the gear box has been damaged previously? It certainly looks to me like that. You could in theory fill it again and paint but next time you dink a rock I suspect you will have the same problem. Some people say they've never dinked a rock others are able to swear to how good Steel Developments are at fixing props because they've done several for them!!

To fix it properly will need welding. Its probably not a major weld but it needs taken off the engine to do.
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Old 24 July 2016, 16:59   #3
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I don't know what uglies the nose cone was hiding on it and don't know what damage could have been underneath previously. It did surprise me that it had a nose cone on it though and there is a lot of filler/resin which I assume was to build out the skeg to the height of the cone.
Being unfamiliar with nose cones though I don't know what it should look like.
We certainly did the fin though.
The other option is a replacement gear case at 1000 but again I don't know the history. I am told this engine has only done 75hrs.
Is the cost of welding going to be high?
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Old 24 July 2016, 17:55   #4
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As far as I know it's not very pricy for the weld. You will pay much more to get a new shaft.
I would look for the whole leg off another motor. Sometimes you can get the prop and all.
I however would take it straight to a gearbox place and not a dealer they will just send it to a gearbox place and tack on their cut.
If you know someone who is a decent tig welder they could whip it out in a few mins. However replacing all the internals will be expensive especially if buying new parts I would look for a used one. Just looked into this process for a motor last week.



This is a good video of the process.
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Old 24 July 2016, 18:12   #5
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Looks like toast.

More concerned about the crack, or what appears to be one developing near prop shaft.

If you can weld, then the rubber seals will be goosed with the heat, plus given this is a big HP engine, then the torque of the prop-shaft and drive shaft are going to throw up all sorts of issues unless it's properly set up with shims, balanced and load tested.

Looked on Ardoran Marine's site as they're Honda dealers, but only have a 115/130hp gearbox.

This sort of thing any use? Outboard Gear Case for 2008 Honda 225 with Propeller Lower Unit | eBay

Anything local with history, then my advice would be to go for it.
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Old 24 July 2016, 18:48   #6
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Quote:
Originally Posted by spartacus View Post
Looks like toast.



More concerned about the crack, or what appears to be one developing near prop shaft.



If you can weld, then the rubber seals will be goosed with the heat, plus given this is a big HP engine, then the torque of the prop-shaft and drive shaft are going to throw up all sorts of issues unless it's properly set up with shims, balanced and load tested.



Looked on Ardoran Marine's site as they're Honda dealers, but only have a 115/130hp gearbox.



This sort of thing any use? Outboard Gear Case for 2008 Honda 225 with Propeller Lower Unit | eBay



Anything local with history, then my advice would be to go for it.

Actually the welding if done right should not damage the seals because the oil in the case can absorb most of the heat. Although of the shaft is bent the seals are probably already toast
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Old 24 July 2016, 23:52   #7
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Thanks for all the advice, I'm not sure it's a crack - I will take a better look.
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Old 26 July 2016, 09:28   #8
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Actually the welding if done right should not damage the seals because the oil in the case can absorb most of the heat. Although of the shaft is bent the seals are probably already toast
Had an acquaintance who bought a twin-Suzuki hardboat. Had some sort of issue with both motors, and they said the same thing (though I don't remember why they were welding on the lower units now.) In any case, both suffered water ingress and died while about 20 miles out. Boston Whaler covered the tow and repairs (replacements of both lowers, as I recall.)

Given that aluminum melts at something over 1200F, I'm not sure I'd want oil in the lower when welding on it.

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Old 26 July 2016, 11:07   #9
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I'd drain the gear oil after any repair and renew. Interesting video here on pressure testing lower leg and checking for bubbles using soaping water.

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Old 26 July 2016, 11:08   #10
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It's been stripped now and welding will take place without oil or seals. Just need a new bearing carrier now!
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