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Old 01 December 2009, 02:22   #1
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Seized bottom end

Is it common practice to use an oxy/acetalene torch to free the bottom end on an outboard to change an impeller. All bolts are removed.
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Old 01 December 2009, 05:11   #2
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i have known people having to do that at times , but its a bit extreame ,i use boiling water and a big rubber mallet ,or a block of wood and a hammer but with care ,,though having said that i havent had any bother in recent years ,perhaps people are removing or servicing the water pumps more often than they used to .worst engine we had to repair was a volvo penta the one with 2 impellers and 2 water pumps ,,one for the engine and the other could be used as a bilge pump and that was a compleate ba,,,,,d to seperate ,but it had been neglected for years ,
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Old 01 December 2009, 05:32   #3
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Is it common practice to use an oxy/acetalene torch to free the bottom end on an outboard to change an impeller. All bolts are removed.
If it's for the Yam 75 isn't there a hidden screw under an Anode? I'd check this before hammers, Mallets and Gas Axes are used.
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Old 01 December 2009, 05:34   #4
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http://rib.net/forum/showthread.php?...aha+bolt+anode
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Old 01 December 2009, 05:37   #5
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I knew someone posted a Step by Step guide to stripping a gearbox off a Yamaha leg.

Read and enjoy http://rib.net/forum/showthread.php?...yamaha+gearbox
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Old 01 December 2009, 05:41   #6
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I knew someone posted a Step by Step guide to stripping a gearbox off a Yamaha leg.

Read and enjoy http://rib.net/forum/showthread.php?...yamaha+gearbox
Don't forget that these instructions are for a 200HPDI Yam and not the 75. But I think the mounting bolts for the leg are the same design.
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Old 01 December 2009, 07:18   #7
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Is it common practice to use an oxy/acetalene torch to free the bottom end on an outboard to change an impeller. All bolts are removed.
Propane's cheaper and comes in bigger tins.
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Old 01 December 2009, 07:22   #8
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Propane's cheaper and comes in bigger tins.
Burns bigger holes too.
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Old 01 December 2009, 14:45   #9
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Thant's why you need to place lots of ball bearing (salt environment use) grease all around inside leg parts before closing, including all bolts.
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Old 01 December 2009, 15:07   #10
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Thanks for the tips guys. The boiling water will probably do the trick. I had found the bolt below the anode so hopefully there is only a bit of corrosion holding it together.
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