KSR1100

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dandrews
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Joined: Fri Apr 16, 2010 7:04 pm
Location: Woodbridge, Suffolk

KSR1100

Post by dandrews »

So, I took part in my first Lerryn rally last year, in a borrowed inflatable and with my LLS. Very wet but a lot of fun. Came away with the notion of having a better rig next time. My host, a Lerryn resident, used my Curlew on his 16'-ish Padstow Sea boat, but being a heavy boat and 4 up not very fast. He also wanted a bit more oomph. So I have managed to get a 12' Portabote to go with the Curlew for myself, and a Seagull 6 KSR1100 for the Padstow.

Now, the big question for the "6" is - is it a roller big end? or has it been replaced with a plain bearing version. As a first step, I have had a look at the con-rod through the inlet port and it looks to be a lot thinner than normal - see picture.
IMG_1021.jpg
So I'm thinking it's a roller and has to come apart. Crank end and flywheel taper is now soaking in wd40 before I try to remove the flywheel and take the bottom end off. I've got a spare Curlew crank with a no.4 con-rod to fit until I can inspect and overhaul the roller crank.
Horsley-Anarak
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Re: KSR1100

Post by Horsley-Anarak »

looks fine, much thinner than normal ali conrods.
conrod.jpg
DSCN5603.JPG
dandrews
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Joined: Fri Apr 16, 2010 7:04 pm
Location: Woodbridge, Suffolk

Re: KSR1100

Post by dandrews »

Thanks H-A. So I'm presuming that confirms it is a roller crank. I'll get it apart and take some pictures.
Horsley-Anarak
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Re: KSR1100

Post by Horsley-Anarak »

dandrews wrote: Sun Dec 06, 2020 6:16 pm Thanks H-A. So I'm presuming that confirms it is a roller crank. I'll get it apart and take some pictures.
yep
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Charles uk
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Re: KSR1100

Post by Charles uk »

Don't take it apart until your sure it's necessary, is there any rust or discolouration around the big-end needles or excess play in the big end?

Yours looks like it hasn't had a hard life from here, so leave it alone!

Oh that wasn't yours it was H-A's.

And I don't know if there is anyone in the UK who could rebuild your crank.

And yes it's a needle crank.

I have some new needle rods with bronze little ends & silver caged needle bearings at £35.00
Make it idiot proof and someone will make a better idiot.
dandrews
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Joined: Fri Apr 16, 2010 7:04 pm
Location: Woodbridge, Suffolk

Re: KSR1100

Post by dandrews »

Thanks Charles, I'll get it apart to the point of being able to inspect the crankcase as per H-A's photos then decide what to do.

Just got the flywheel off and next step is to remove the powerhead from the driveshaft tube. Taking it slowly.

Under the flywheel, I found a couple of pieces of broken plastic, but I cannot see anything that they might have come off. The ignition module looks intact. Anyone recognise the pieces? The smaller one has a bit of a thread on it.
IMG_1024.jpg
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Charles uk
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Re: KSR1100

Post by Charles uk »

Part of the carb choke shroud.
Make it idiot proof and someone will make a better idiot.
dandrews
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Location: Woodbridge, Suffolk

Re: KSR1100

Post by dandrews »

Spot on Charles.

I didn't notice that as I was looking for something with a bit broken off it and it turns out the choke shroud has been replaced.
IMG_1027.jpg
I have separated the powerhead from the drive tube. Just need to undo the crankcase from the block and withdraw the piston. Photos of the crank & big end soon I hope.

I guess I should check the inner exhaust while I'm at it but the exhaust tube seems well stuck onto the block.
Horsley-Anarak
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Re: KSR1100

Post by Horsley-Anarak »

dandrews wrote: Tue Dec 08, 2020 2:06 pm I guess I should check the inner exhaust while I'm at it but the exhaust tube seems well stuck onto the block.
I have had to cut a couple off Kingfishers, they can be very stuck.
dandrews
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Joined: Fri Apr 16, 2010 7:04 pm
Location: Woodbridge, Suffolk

Re: KSR1100

Post by dandrews »

Well that was an interesting afternoon. Separated the crankcase & block & took the head off.
Pictures as follows
The head
IMG_1033.jpg
The bore
IMG_1035.jpg
IMG_1034.jpg
The inner exhaust (couldn't get the exhaust tube off yet but it looks pristine by eye.
IMG_1037.jpg
The big end pics follow in the next post
dandrews
Posts: 62
Joined: Fri Apr 16, 2010 7:04 pm
Location: Woodbridge, Suffolk

Re: KSR1100

Post by dandrews »

And the big end
IMG_1030.jpg
IMG_1031.jpg
IMG_1032.jpg
Its all a bit tarry but no sign of rust or bluing, although one side of the slot through which you can see the needles looks a bit rough.

But the problem is -
IMG_1036.jpg
The big end pinches in the crank webs about 20 degrees either side of TDC & BDC so it will not even fall under the weight of the piston.

Maybe it was already like that or maybe I did it when removing the flywheel - followed the service manual and it only took a couple of firm blows with a lump hammer on the flywheel nut.

Oh well, i'll split the crankcases and get it onto a couple of v-blocks with a dial gauge and see what is going on. That way I can also get some better close-ups of the bearing.

In the meantime, any tips on re-using the head gasket?

And if you want any pics of any other bits while its apart just let me know.
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Charles uk
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Re: KSR1100

Post by Charles uk »

Remove the piston & clean the crank & rod with fuel mix, remove all the waxy deposit with a paint brush.
Make it idiot proof and someone will make a better idiot.
Horsley-Anarak
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Re: KSR1100

Post by Horsley-Anarak »

This is what i do to remove flywheels, as the cranks bend very easily
DSCN55971.JPG
You can anneal the gasket on the gas stove, cherry red and quench in water.

I don't need any pictures thankyou.
dandrews
Posts: 62
Joined: Fri Apr 16, 2010 7:04 pm
Location: Woodbridge, Suffolk

Re: KSR1100

Post by dandrews »

Thanks for the puller photo H-A. Presumably you have to first remove the flywheel to drill & tap it before you can screw the studs in use the puller. So the puller is only good for the second dismantle onwards? Or did you drill the flywheel in-situ? I must look into making one.

https://www.icloud.com/sharedalbum/#B0pJ0DiRHJE6a0t

iCloud photos & videos of crank alignment measurements should be viewable via the above link for 30 days.

The crank cleaned up nicely, and no longer sticks so I guess it was stuck with fuel residue rather than distortion. It also has a coppery finish near the big end. The rod rocks on the pin about 30-40 thou at the small end tip, and has about the same amount of slide on the pin end to end.

I set up a crude alignment rig with a vee block and a dial gauge - I know I should use knife-edges but I thought I'd try with what I have to hand.

Do not really understand the results. With the flywheel end in the block, the driveshaft end wobble is about 1 thou. Other way round it is 5 thou. How can they be different?

Need to put my thinking cap on.

See what you all make of it.

Hope people find this interesting - it is a journey of discovery for me too! All comments gratefully received.
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Nudge
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Re: KSR1100

Post by Nudge »

Do you have a lathe? If so put the crank between centers and do the test again. it would be interesting to see the results.
"THE KING OF BLING"!
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