Forums > Sailing General

Bukh out

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Created by samsturdy 2 months ago, 11 Aug 2018
samsturdy
NSW, 1246 posts
11 Aug 2018 10:44AM
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So, yesterday I went to the boat to relieve the engine bay of its resident. I have good all round access to the engine
but it's still a bit fiddly reaching around to undo things plus my old bones didn't appreciate lying on a hard surface
for most of the day. Unbolting the feet from the bearers went easier than I thought as I guess forty years has gone
by since they were last touched. I took the flywheel off to reduce the weight of the lift, as I was single handing this
job I needed all the help I could muster. After double checking that all was released I slung a good thick rope around
the boom, made a sling around the engine, winched the boom up to take the weight and pulled the engine off the
bearers and lowered it to the floor.
So now the old Bukh is sitting on the cabin sole ready for the work boat to lift it through the hatch and lower in its
replacement.
It's been a long time since I tackled such a job so I'm really happy with the result and not too many aches and pains
this morning.

Donk107
TAS, 1901 posts
11 Aug 2018 11:11AM
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Hi Sam

It sounds like you have made good progress

I don't suppose you have any photo's of the work so far as i am sure the forum members would be interested in the swap over

Regards Don

samsturdy
NSW, 1246 posts
11 Aug 2018 11:31AM
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If Missus had been there definitely would have been pics however as I was on my own facing a job I had
never done before, I'm afraid photo's were the last thing on my mind. Pity though, as you say Don, it's an
interesting job.

oldboyracer
NSW, 189 posts
11 Aug 2018 2:42PM
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Great progress Sam ,I find it's a bit daunting tackling what is a large job on board but once you get into it things seem to just hum along nicely. I was determined to get pics when I did mine so I could look back and see what I had done over the years ( and show the kids where there inheritance went ) putting it in is easier than getting the old one out as new ones don't weigh anything. Pics for the next bit or It didn't happen as they say. At this rate you will be sailing next weekend.

samsturdy
NSW, 1246 posts
11 Aug 2018 4:21PM
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Ha OB. Next weekend is grossly ambitious. Next job is to clean and paint the area. The bearers ( steel ) are
in excellent nick so they'll be painted a nice red colour ( Missus's choice, left over Bukh paint ). Then get the
new engine delivered and make the new control panel fit as it's smaller than the Bukh one before I fit the
engine. I'm doing this because I'll get Sandy to line it up and do the first firing and I need the panel and loom
in place. So the beat goes on.

UncleBob
NSW, 281 posts
11 Aug 2018 4:54PM
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Select to expand quote
samsturdy said..
Ha OB. Next weekend is grossly ambitious. Next job is to clean and paint the area. The bearers ( steel ) are
in excellent nick so they'll be painted a nice red colour ( Missus's choice, left over Bukh paint ). Then get the
new engine delivered and make the new control panel fit as it's smaller than the Bukh one before I fit the
engine. I'm doing this because I'll get Sandy to line it up and do the first firing and I need the panel and loom
in place. So the beat goes on.


Sam the panel is easy, piece of 6mm perspex (colour of your choice, though black works well ) cut size of old panel then new smaller panel installed into that. Looks smart enough to be original.

samsturdy
NSW, 1246 posts
11 Aug 2018 5:47PM
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Thanks Bob, that's reminded me that I have a large piece of tinted polycarbonate window that'll do just fine.

SandS
VIC, 5279 posts
11 Aug 2018 7:43PM
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Good Work Sam !!! and thats handy having the mob with the work boat and crane !!

TKNick
NSW, 86 posts
11 Aug 2018 8:22PM
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Glad all went well Sam. Swapped the engines over today on Warlock with the help of two mates. Moored on the public wharf and used the boom and chain block to lift the engines out then in. The new Vetus is now sitting on the cabin sole awaiting final fitment once the engine bay is clean and the bed bearers adjusted.
All went well until it came time to sail back on to the mooring. Whoops the job halyard clutch was off leaving the luff loose and the boat refusing to go to windward. Had to anchor, fix the rigging the try again. Picked up the mooring on our second attempt. Note to self - Double check everything

cisco
QLD, 10699 posts
11 Aug 2018 8:57PM
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Great stuff Sam. I think you are going to love your little Kubota. It would only be half the size of the Bukh wouldn't it??

samsturdy
NSW, 1246 posts
12 Aug 2018 9:51AM
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Thanks for the response guys. I intend to take a couple of pics next time I go to the boat, a bit late
I know but it'll give you an idea of what's going on.
Yes Cisco, about half the size of the Bukh which had all of 1/2 inch clearance under the cockpit. One
of the selling points of the Beta was that you can reach over the engine to get at whatever you want.
I just hope that the fittings ( engine mounts, prop shaft spigot etc ) are interchangeable as advertised.
Apparently Beta make the engine mounts to your specs and in this case they are made to fit Bukh mounts.
We'll see.

samsturdy
NSW, 1246 posts
14 Aug 2018 3:31PM
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A couple of pics about progress so far.
Bukh all forlorn on Cabin floor




How I solved the PSS Problem




Engine Bay all cleaned up


samsturdy
NSW, 1246 posts
14 Aug 2018 3:35PM
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I don't know how to rotate the pics.

boty
QLD, 408 posts
16 Aug 2018 8:25AM
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impressively clean bilge

samsturdy
NSW, 1246 posts
16 Aug 2018 6:15PM
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Thanks boty....even more impressive now. Missus decided my paint job wasn't up to par so
she's had her head in the engine bay all day sloshing the paint brush about. Should have the
new engine delivered next week so I'll post another couple of pics.

Ramona
NSW, 4391 posts
16 Aug 2018 6:19PM
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While you have time I would suggest tossing the plastic hoses and replacing with rubber and use two hose clips.

Donk107
TAS, 1901 posts
16 Aug 2018 6:35PM
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I try to use this type of clamp wherever possible instead of the worm drive type

The only down side I can see is you need to know the size of the hose when you buy the clamp as each clamp size only fits a limited range of sizes

Regards Don





samsturdy
NSW, 1246 posts
17 Aug 2018 10:06AM
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Good idea Ramona, I have to put a 3/4"-1/2" reducer in the raw water line anyway as the Bukh is 1/2" and
the Beta is 3/4" so an upgrade is due.
Thanks Don. I haven't seen those around but may be a bit of overkill with my little boat.
Arranging for delivery on one day next week.
One concern I have is the prop shaft fitting. For the Bukh it was a square block with four holes and a flange
with four holes. I have an idea the Beta fitting is a larger dia. and I'm wondering if the shaft fitting is the same
or whether it's some arrangement I can do in situ. Or do I have to take the shaft out to alter it for the new
fitting.

TKNick
NSW, 86 posts
17 Aug 2018 12:53PM
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HI Sam
I had a 5 inch 4 bolt set up on the Yanmar. My Vetus has a 4 inch 4 bolt flange so had to change the coupling and flexible coupling to fit. I use a polyflex split coupling and flexible coupling. Got them through DH Porter for $650 delivered. The flexible coupling was $250 so you could save if you don't need that part.
Your existing coupling should have grub screw and also be keyed to the shaft. With the grub screw undone you should be able to tap the coupling forward and off with a rubber mallet.

samsturdy
NSW, 1246 posts
17 Aug 2018 1:55PM
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Hi TK. I have the coupling off. The square block slides on to the shaft which has two grooves each side for the
fastening bolts to locate, this prevents the shaft spinning within the coupling. The square block is split so
when the bolts are tightened it squeezes the block on to the shaft. I'm wondering if the Beta coupling
will be the same.

TKNick
NSW, 86 posts
17 Aug 2018 2:33PM
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Hi Sam
The distance between bolt hole centres plus the spigot diameter Will be the governing factors. Polyflex have diagram of their couplings that explain what a spigot is. Most output flanges have a 3.2 mm female indent that is 50 to 70 mm wide. The face of your coupling should have a matching male face that will fit inside this indent. Hopefully you will get lucky an it will fit. Mine didn't but as the original is only 4 years old I may be able to sell it on Gumtree and recoup some of the cost.
If you do have to change the Coupling DH Porter can machine the coupling to match your shaft arrangement.

samsturdy
NSW, 1246 posts
17 Aug 2018 4:21PM
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That's right TK I do have a male face on the existing coupling however, the Beta's output flange is not a disk, it
has four 'legs' to which is attached a flexible 'cross' shaped coupling. The shaft coupling is being supplied so that's
not a problem, it's how the shaft coupling is attached to the shaft that has me thinking.



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"Bukh out" started by samsturdy