28 replies to this topic

[Snowbird]

Picked up an outboard motor thursday on a bit (huge) of a gamble, it was advertised as for spares and stated that the cylinder block was knackered so no issues with the deal, I recon I'm gonna have a wee bit of a challenge but going to have a bloody good go at rebuilding the block (with a lot of help from Pete the welder at work).

When I got it home I hooked up the fuel tank and gave the primer bulb a few squeezes and tugged on the pull cord and away it went sweet as a nut so has to be worth a go at saving, it's a honda BF6B with the throttle stop removed to make it an 8HP, it's the same motor other than the restriction.

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The crank rods and pistons look like they've barely run, main bearings look immaculate.

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Wish me luck....

 

The clean up process so far, will be better when I get into the blasting cabinet at work.

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Edited by Snowbird, 09 September 2023 - 01:44 pm.

[Catteeclan]

The other good thing is it doesn't have to be to pretty as it's only got to hold water. Interested to see how Pete will tackle it.
My old boss would have called it monkey metal. {crap).

[Snowbird]

Being honda I'm hoping it's good aluminium under there somewhere, the corrosion is down to salt water use.

[dapleb]

Pistonias look
Bootiful....the rest not so much. But ewe is already up if it were fur spares. ♪⁠┌⁠|⁠∵⁠|⁠┘⁠♪

[Catteeclan]

the corrosion is down to salt water use.

Good point

[dablik]

Fook me Dave, the mice been at that then, so i presume you hope to reweld that lot, would it mean having to cut away to good metal 1st..

[Snowbird]

I don't know about cutting away good metal, gotta find good metal first.

I'm hoping to keep most welding to the water jacket area to minimise distortion in the block itself.

[dablik]

Good luck matey hope it works out 

[Snowbird]

The metal looks better now it's been blasted cleaner, looks like it should weld ok.

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And the donor material.

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I also have a good piece of aluminium bar to make up a new threaded boss for the head bolt.

[dapleb]

I think it's gonna make it!!

[dapleb]

How cool. Looks noice!!

Cheaper than a yam boike gasket set?

[Snowbird]

£60 just for the head gasket, luckily I only need a couple of other gaskets as most came off cleanly so a smear of non setting sealant on each side will keep costs down.

[Snowbird]

My last post and pics seem to have buggered off so I'll re-post....

 

Didn't use the piston skirt in the end, had a couple of otherwise scrap magneto housings that had an almost perfect shape section so chopped them up.

Had a skim down today till the rest of the face just started to show signs of the cut then finished off with a sheet of emery on a surface table by hand.

 

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That'll do it I recon, can consider buying the gaskets now.

Gonna give the water jacket another blast out then paint inside with a couple of coats of urethabond 104 as it sets rock hard and resists most things and will sort out any porous bits in the welds.

Got a couple of small bits in the exhaust ports to weld and dress then the head will be sorted.

Looks like I got myself a cheap outboard.

[Catteeclan]

That's some good work.

[dablik]

Cor, well done Dave, that's a good salvage  clever bassad 

[Snowbird]

With a quick hone and a coat of paint and a drop of urethabond in the water jacket you'd never know....

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Now to get the exhaust stud out of the head that I've broken....

[dapleb]

Boatiful

[Snowbird]

S'gettin there.

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Got the broken stud drilled out and tapped this morning too so chuffed.

Also managed a bit of guvnors work but not much, far too busy.......

 

[ramo]

Looks like a cracking job there mate

[Studley Ramrod]

Good skills SB 😎