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Workdangler

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Anyone had an issue with lower unit housing cracking?
Nordmann

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Not at all common. What caused the crack, impact or lack of oil? Model?
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Huey

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+1 to what Nordmann said and I have not seen a V4 S or S2 gearcase crack without an external reason.
olypopper

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Reply with quote  #4 
I’ve seen several crack over the years. Water in the gear lube and freezing temps make it happen in my area.  Fortunately you boys in the tropics won’t be seeing that one.....lets hope!
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ajtec

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Quote:
Originally Posted by olypopper
I’ve seen several crack over the years. Water in the gear lube and freezing temps make it happen in my area.  Fortunately you boys in the tropics won’t be seeing that one.....lets hope!


Seen this too in the northeast but not specific to this brand or model.
olypopper

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Originally Posted by ajtec


Seen this too in the northeast but not specific to this brand or model.


Ive got a pile of cracked housings from every brand and a stack of plastic Merc tnt cylinders that cracked too.  

Another fracking problem I’ve seen is Honda and Yamaha lowers that will grow corrosion between the housing and prop shaft hub retaining nut.  They’ll split lengthwise on the case. Back when I lived in Texas we’d take the nuts out during pdi and apply grease or gasket sealing compound to slow that corrosion and stave off the inevitable. 

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Huey

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Yes I have seen the other brand crack due to salt where they use the propshaft housing nut design to hold the bearing carrier. The expansion due to salt cracks the housing bu the G1 V4 dies not to use this sort of design. A crack due to being frozen is not something we have to worry about down here in Australia.
Nordmann

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Wrong Craig, up my way we do.[cool]
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scott478

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Reply with quote  #9 
Noticed a crack in the lower unit housing above the gear case about three years ago.  Took photos to the dealer and they'd never seen it before.  They recommended epoxying the crack which was done.  Going on nine years and 300 hours of hard use in the flats on a tunnel hull and the motor has been great in all respects.  Attached photos.  Kind of looked like a metallurgical issue but don't really know. IMG_2929.jpeg  IMG_2931.jpeg  IMG_2932.jpeg

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