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here is a link to a Cad model of a Webster if you wanted to download it https://grabcad.com/library/webster-engine-2

I have heard that you can harden copper tubing by sandblasting it or brushing it with a wire wheel if you are concerned with pressure.

Thank you very much! correct me if I am wrong, is that the engine that is used on the front cover of Malcolm Stride's book, Miniature Internal Combustion engines? (fantastic book by the way) would half inch lift sound about right in an engine ~110cc?

Also, does anyone know what shape/ profile of the cams would be the most suitable for a flat tappet high revving motor?

well hello again fellas, I have been busy with school as of late, with not much time for messing about. but I have been coming up with the camshaft timings. the bore 60mm stroke 40mm compression ratio 10:1, and I am aiming for peak power at 5500 rpm As always all suggestions/improvements are...

good news, the honda gx120 bore is 60mm! now I just need to buy a piston and ring set.

Thank you fellas for the suggestions Rod to put it simply I'm trying to make a 4 stroke engine out of a 2 stroke. I'm just messing around with ideas for now but thank you for your input XD351 Yes I have had I look at the briggs engines and sadly the smallest i can find is ~65mm and that is...

hello again fellas! After a lot of thinking I have decided to drop using original piston because i wasn't happy with the combustion chamber shape. Thus i have been back to the drawing board. the new piston is from the good old Victa lawnmower, at 62.7mm bore it was a easy swap, and by having a...

oh and I forgot to mention that the spark plug will be a 10mm, with 1" reach

Well, with another year done and dusted am back with the basic layout of the seagull 4 stroke. It is single overhead cam (thereby reducing the parts count, reducing the weight and most importantly keeping it simple) the arrangement it is done so by utilising 3.5 flat head briggs lawn...

Happy new year! lets make this one the best one yet!

I would try annealing the pistons.

hello john, thanks but I am already aware S.O.S I have personally bought parts from John (the owner) and I have spoken to him about my idea, and he likes the idea and is interested with where it goes. Greg

Thanks mate I was thinking of the same kind of idea using off the shelf bits and bobs. Ideally I would like to make this commercially. But first I need to design it and build a prototype and see where it goes from there. Greg. p.s that is a nice pic of an XD falcon you have got there. if I am...

Also I forgot to mention on the crankcase it will have one of these that will screw into the water jacket (with a 1 way check ball behind it) so you can connect your garden hose to it to make it easy and simple to flush out after use!

Recently in a daydream during assembly at school I had the idea of bringing British Seagull back, with new model, a single cylinder 102cc ohv 4 stroke using mostly the same parts as the original as possible. like the gearbox, props, mounts, flywheel, water pump, carburettor and fuel tank just to...

Good news everybody! I have found a shop that sells Kiwi Castings in Australia ! after some time searching on the interweb I found out that http://www.ejwinter.com.au/ sell castings for the KIWI! Bad news is that the castings aren't a stocked item and that to get them cast would take 6 weeks...

Thanks guys, it has been a while since I have had the old webster running, it needs new rings after I ran it so much! now I have got my own lathe and mill I am working on more ambitious projects, the diesel Kiwi.

Great job! Only if I could machine engines that looked half as good as that!

cobbadog, he does ship to Australia you just got to ask him to that's what I did when I bought my gears from him.