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I built one and Wow it can bight! Burned right through the insulation of ordinary wire.

So many great memories. I have come to the conclusion that if I don't write my memories no one else will, I still have about 40 years to go. Ted from down under

Reasons I was not happy with the dual carbys was after only a few minutes running heat transferred to the carbys and petrol began to boil, we have seen this problem in older cars especially in tropical areas. The balance between the two was very difficult to achieve. I mentioned cheating above...

More on the Onan opposed twin in half scale, after a lot of fiddling we reworked the manifold and set up single carby, runs and starts much better. Then we revisited the shop made carby with some cheating, fitting the fuel pump/diafragme block to the side of a block of alloy with my original...

An update on the Onan opposed twin in half scale, See it running After stripping it down and sealing some poor casting issues I still was not happy with starting and idling. Brian Rupnow's figures on cam design would have been very handy if he had uploaded them a couple of weeks earlier. Armed...

I use a product we call Acetone available from hardware's, there is another product the Auto Painter's use to remove grease and finger prints off cars before painting, Wax Off or similar. Thanks for the questions, Ted

Yes but I have a porosity problem with the sump casting, it leaks oil when not in use, not very much but it only holds a cup full. Have to take things apart and seal it with Locktite. I know that the 1920s Buicks had the same problem with the crankcase castings in alloy. Ted

Latest on the Onan opposed twin in half scale, have run it several times lately and it is starting better and will almost idle. Some more work, pictures 1-3, a few days ago this was a perfectly good 20lt drum (4 gallon) picked up on the side of the street (thrown out for annual trash pick up by...

Shortened Toyota engine.

Hi Mark, the model, second pic, runs on 7 and a quarter inch track 184mm the engine is a Victa 160cc much modified, it will run either way, has car pointless ignition with 2 wings to activate the magnetic pickup 18 degrees before TDC in either direction. In operation the engine runs backward to...

Some interesting engines about, some 2 stroke boat engines run with valves in the manifolds, allows for oil in the sump. Ted

Yes Ignator I had too strong a spring in the valve and nowhere for the oil to go. The PCV valve on a multi cylinder engine actually works differently, it allows a small draw on the crank case at idle and a large amount at revs. My Onan powered welder began to leak at rear main oil seal but I...

try this YouTube video, it is obvious I have had a win over the oil leaks, there was a crankcase pressurisation issue.

The latest on the Onan opposed twin in half scale, it runs The Grandchester Model Live Steam Club Queensland Australia (of which I am a member) a new engineering trophy has been created in honour of 2 very resourceful and respected engineering men, it is my honour to be the first person to win...

Thanks AlexS We have had it running again, we started it on the lathe and lets say I will not need to oil the lathe for a while! Still having trouble with valve sealing, had issues with timing and in the process put a piece of wire through the plug hole, finished up bending the intake valves...

Someone suggested that the way I made up the crankshaft was risky, well sure enough it came back to bight me, after the run & after a few more trial starts the engine got stiff & the flywheel was noticeably out true (photo1) So the Onan looks like this at the moment, (photo 2) We replaced the...

Thanks Guys, it does run smoothly bolted down to a one ton lathe. I spent the day attending to oil leaks and other problems, perhaps another day or two before we try again, then I need to make the most visible part, the fan cover. Thanks for watching Ted

After much work the Onan finally kicked in and ran. Some work to do yet, maybe a bought carby might improve things, we had it running on a petrol soaked rag, and on a gas torch.It runs. thanks for watching Ted from down under

Just two photos today, the rings are on the pistons, gaskets made, valve springs fitted, even have carby in place, few little jobs to do, will give it some run in on the lathe get the rings to bed in a little.

Hi all I have not been on for a while, had carpal tunnel operations March 25th, all's well. Photos 1 and 2, drilling the ports, 3, welding the exhaust system 4 and 5, muffler and intake manifold, just tacked in the photos, 6, starter in place. Maybe a trial start soon. Ted from down under