Little Forty F341

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Charles uk
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Re: Little Forty F341

Post by Charles uk »

Perhaps as Jan suggested, that is where the name Little 40 came from & all the rest of the small capacity followed on to be 40 - & plus.

I never saw that connection (tunnel vision) Jan, well done that now answers many questions!
Make it idiot proof and someone will make a better idiot.
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Jan
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Re: Little Forty F341

Post by Jan »

Charles, I think we solved a mystery.

I was always wondering why they named the 64cc models Little 40 and 40 Minus.
After I measured the bore and stroke of F341 I understand the 40 models started as 40cc outboards.

Because of the corrosion I bead blasted the aluminium parts.

I used some wire wool and polish to remove the dull bead blasting finish.

It will take some time in a moisty shed to get back the nice aluminium patina.
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Assembling the crankcase and crankshaft.

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The easiest parts are done.

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I used some Loctite Liquid Metal to fix the corrosion holes of the lower crankcase.

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The parts of the choke assembly.

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The carb body and float chamber is a one piece casting with Amal number 52/001.
There is a 8,5mm restriction placed in the bore of the carburettor, the same size of the inlet diameter of the cylinder stub.

Jan
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Jan
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Re: Little Forty F341

Post by Jan »

A F341 update.

The flywheel was wobbling so I replaced it by a period correct flywheel from the shed.

The coil was dead so I also replaced it by an old coil in working condition.

The late style Villiers throttle lever is replaced by a slim long SD style Amal lever, is this correct for the early Little Forty with Amal carb?

I ordered BSF dices and made new cylinder studs from an old 102 clutch rod.

The biggest problem will be reparing the badly corroded head.

I started making an aluminium adapter plate to fill the corroded area of the head.
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image.jpeg
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Jan
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Keith.P
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Re: Little Forty F341

Post by Keith.P »

Not seen one with an old style amal lever on before, pin for tiller is fitted vertical.
what about the tank mounts?
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Stelios_Rjk
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Re: Little Forty F341

Post by Stelios_Rjk »

Now that's some interesting equipment over there!

You used a a clutch rod to make some new studs? Were on this model used 1/4" studs? My FVP has 5/16" and I was also tempted to replace them but I didn't touch them in the end as it then would be quite possible, that damages on the crankcase would occur.
I love the 10600/145 turns!!!
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Oyster 49
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Re: Little Forty F341

Post by Oyster 49 »

There are some period ads provided by Skyetoyman on the main SOS site, these show the early little forty with a SD style brass amal throttle lever, so carry on! Looking good Jan :D I have a FV cylinder head if it is any help.
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Jan
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Re: Little Forty F341

Post by Jan »

Keith,

Pin for tiller is fitted horizontal on my F model.

I will weld the tank mountings back on the head, I did it before on my FVP.


Stelios,

Studs are 1/4. Crankcases, cylinder, piston and head are different on a F model.


Oyster 49,

Thanks for the offer but a FVP head will not fit on a 40cc F model.

Jan
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Collector Inspector
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Re: Little Forty F341

Post by Collector Inspector »

Jan

Nice work in progress!

I see "Permatex"...............also well done!

Can not have RTV sneaking in anywhere can we :roll:

B
A chicken is one egg's way of becoming others
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Stelios_Rjk
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Re: Little Forty F341

Post by Stelios_Rjk »

The RTV I use is made by Permatex :lol: :lol: :lol:
I love the 10600/145 turns!!!
headdownarseup
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Re: Little Forty F341

Post by headdownarseup »

hi all
just picking up on a slightly earlier post on this thread re casting, i have a lot of scrap aluminium in my garden, all from seagulls (mostly gearbox casings)
is anyone likely to be doing any casting in the near future?
if so, give me what its worth scrap value and its yours.
just a thought!

jon
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Jan
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Re: Little Forty F341

Post by Jan »

Today I welded, machined and finished the cylinder head.
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Everything fits together perfectly.

Now I have to make the base and head gasket.

I think the base gasket of the F model was made of paper but I don't know the material used for the head gasket.
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The gearbox is beyond repair.

Does anybody knows a good Little 40 model FV gearbox for sale?

I'm also looking for the original metal impeller.
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Jan
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Stelios_Rjk
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Re: Little Forty F341

Post by Stelios_Rjk »

The result with the head is astonishing!

The pump rotor you need is the one made of aluminum? I should have one spare somewhere.
I love the 10600/145 turns!!!
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Oyster 49
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Re: Little Forty F341

Post by Oyster 49 »

Jan,
I have an FV gearbox with the skeg missing, I'll check.
Keith.P
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Re: Little Forty F341

Post by Keith.P »

The pump rotor you need is the one made of Bronze.

The drive tube is smaller on the FV/FVP, maybe smaller than standard on the F as well.
Last edited by Keith.P on Tue Apr 15, 2014 9:02 pm, edited 1 time in total.
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Oyster 49
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Re: Little Forty F341

Post by Oyster 49 »

Hi Jan, sorry that FV gearbox with the broken skeg has gone. Can't remember who had that particular part. I do have a complete FVP gearbox though, complete with waterpump housing and rusty leg.
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