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Villiers Mk25 nut sizes

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Villiers Mk25 nut sizes

Post by Tony C on Thu Aug 18 2011, 21:31

I have recently aquired a 1947 villiers mk25 engine, unfortunatly the nuts which hold the carb & exhaust manifold are missing, any ideas on the size please? sorry to ask but I don't have a clue! Embarassed

Cheers Tony.

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Re: Villiers Mk25 nut sizes

Post by kevjhnsn on Fri Aug 19 2011, 11:08

Tony C wrote:I have recently aquired a 1947 villiers mk25 engine, unfortunatly the nuts which hold the carb & exhaust manifold are missing, any ideas on the size please? sorry to ask but I don't have a clue! Embarassed

Cheers Tony.


hi there tony
i also have a villiers 25 from 1946-7 mine is a petrol/parrafin with villiers vapourizer (july header photo on here)
if the studs for the exhurst and carb are original they are a 1/4" thread on the outer nut end
spanner size off memory they are around 9mm on mine
got my replacement nuts from a diy shop,
george at villiersparts.com sellls new studs and nuts sepperatly if you cant find them ,but you have to pay goodmoney of villiersparts
if you need any other help with villiers i have worked on many and have the original parts and instruction books for 25s
i have many carbs to suit for parts if you need any for the villiers cm36* model carbs
thanks kev

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Thanks Kev

Post by Tony C on Fri Aug 19 2011, 18:39

Thanks for the info Kev, will visit local DIY see what they have.

Cheers Tony.

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TIMING FLYWHEEL IF REMOVED FOR MAGNETO WORK

Post by kevjhnsn on Sat Aug 20 2011, 00:38

Tony C wrote:Thanks for the info Kev, will visit local DIY see what they have.

Cheers Tony.

just a note for you
if youve had the flywheel off for cleaning magneto points and the likes
you will now know there is no keyway for timing flywheel back to crank ect also
ive rebuilt 7-8 of that idea and the 25 are the worst for slipping while refitting and tightening
so when you know the piston is 3/16" before T.D.C and the line on flywheel is tdc to mark on backing plate
make sure the crank and flywheels are conpletly spotless clean with thinners or carbcleaner spray,
put a couple of centerdot marks onto crankshaft and then tighten up like bruce almighty tap with a soft hammer and then do it all again on the tightening
OTHERWISE WHEN U START THE ENGINE OR EVEN SOMTIMES WHEN STOPPING IT LATER ON THE BLOODY FLWHEELS ROTTATE A COUPLE OF DEGRESS
AND YOU HAVE TO START TIMMING IT ALL OVER AGAIN
ive got a few over the years becouse the owners removed the flywheel and found no crank timing mark some people say to use the keyway on the pulley end but THAT IS A MIFTH i nearly broke my wrist becouse an supposive villiers man told me that was the way they were done in the factory
no such thing LOL
ANYTHING ELSE ASK PM ME AND WILL HELP asap
happy villiersing KEV

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Villiers Mk25 carb & ex nuts

Post by bencam43 on Sat Aug 20 2011, 18:52

The nuts on the exhaust & inlet manifold are special nuts 1/4" B S F but they are a smaller spanner size and deeper as there is not room for an ordinary 1/4" nut on the flanges, at least they are on mine that i have just rebuilt.
Cheers Bill

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Re: Villiers Mk25 nut sizes

Post by kevjhnsn on Sun Aug 21 2011, 00:05

bencam43 wrote: The nuts on the exhaust & inlet manifold are special nuts 1/4" B S F but they are a smaller spanner size and deeper as there is not room for an ordinary 1/4" nut on the flanges, at least they are on mine that i have just rebuilt.
Cheers Bill


hi bill
you have the nuts like on one of mine they are a black coloured steel nut /hardened about a 8-9mm spanner size ????
if this is the case i can get them but there not cheap
i need some more of them too
the more the merryer on the price,
if we buy them together they will be slightly cheaper
let me know if interested or if you find some in the mean time.
get me 6-8 nuts will pay you for them no worries
im also looking for 2x studs 68mm for villiers vapourizer same threads as standard villiers studs for exh/intake
thanks kev




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VILLIERS Mk25 nut sizes

Post by bencam43 on Sun Aug 21 2011, 18:57

Hi Kev, i don't need any nuts, but i will have a look and see if i have anything lying around are the 68mm ones setscrews or studs threaded at both ends. My mk 25 was in fairly good condition so i did'nt need to replace any bolts.
Cheers Bill

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Re: Villiers Mk25 nut sizes

Post by kevjhnsn on Sun Aug 21 2011, 19:51

bencam43 wrote:Hi Kev, i don't need any nuts, but i will have a look and see if i have anything lying around are the 68mm ones setscrews or studs threaded at both ends. My mk 25 was in fairly good condition so i did'nt need to replace any bolts.
Cheers Bill

studs and nut or setscrews as long as they fit the tread in the inlet /exhusts on the engine block external tread or screw top or setscrew not to bothered about thread externauly
-or even if they are longer that i can cut down with threads on at around the 68mm mark
thanks kev

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Villiers Mk 25 nuts

Post by bencam43 on Wed Aug 24 2011, 11:10

Hi Kev I have found a couple of nuts that you need but no luck with 68mm bolts. If you PM me your address i will stick them in the post to you Cheers Bill

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thanks mate

Post by kevjhnsn on Wed Aug 24 2011, 12:30

hi there tony
thanks ive pm ed you
thanks very much kev

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Villiers Mk 25 nut sizes

Post by bencam43 on Wed Aug 24 2011, 13:41

Hi Kev I think you may have PM'd the wrong person ! ! ! Anyway since then i have been to a local engineers and he says he has BSF bolts the size that you are looking for !! do you want me to get you a couple?. Bill

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Re: Villiers Mk25 nut sizes

Post by kevjhnsn on Thu Aug 25 2011, 18:11

bencam43 wrote:Hi Kev I think you may have PM'd the wrong person ! ! ! Anyway since then i have been to a local engineers and he says he has BSF bolts the size that you are looking for !! do you want me to get you a couple?. Bill

hi
yes please bill
if he has them at 80mm they would work better and i can shorten to suit as i forget to add the gasket gaps on
will try your pm again
thanks kev

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Re: Villiers Mk25 nut sizes

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