Seized bottom end

[keelhauled]

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.

[m chappelow]

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 ,

[Hightower]

Originally Posted by keelhauled

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.

[Hightower]

http://rib.net/forum/showthread.php?...aha+bolt+anode

[Hightower]

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

[Hightower]

Originally Posted by Hightower

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.

[Downhilldai]

Originally Posted by keelhauled

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.

[Mollers]

Originally Posted by Downhilldai

Propane's cheaper and comes in bigger tins.

Burns bigger holes too.

[Locozodiac]

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.

[keelhauled]

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.