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    Major Seal 30cc Build

    Big smile! Very happy. I only had 2 stroke mix on hand. Will do some more setup with the correct fuel. Does anyone mix a little oil with the fuel?
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    Major Seal 30cc Build

    CSK17 17mm Sprag Clutch One Way Bearing Without Keyways 17x40x12mm Simply Bearings Ltd. This is the one way bearing. I am not sure if it will hold up to continuous overun at engine speeds but I must start somewhere. The pulley is 44 tooth 5mm pitch for a 10mm wide belt machined for a press on...
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    Major Seal 30cc Build

    Done with the connecting rod pickups. I decided to thread them into the caps and locktite. Now on to the ignition which will be triggered with magnets on the backside of the flywheel. I have also installed a one way clutch and tooth belt drive pulley for the onboard starter. Getting close! :)
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    Porsche 917 flat 12 engine

    Nice! Looks like a slide throttle plate.
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    30cc Inline Twin 4-stroke Engine based on Westbury's Wallaby

    👍When receiving a performance cam they come with a degree sheet showing open and closing events and duration usually at 0.050” lift . Degreeing a camshaft with a degree wheel on the crankshaft and dial indicator on the lifter just makes sure the setup checks out as designed. Adjustment brings...
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    Looking for inexpensive carb for trial running of Seal Major 30cc

    Yes the kit does come with a carb Charles. The instructions for getting it to transition cleanly from idle to WOT and the throat size adjustments required to accomplish this are very good but seems like it could be long winded. I'll get it running with this first.
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    Major Seal 30cc Build

    Having never done seats this small before I thought I'd give this a try. I use this type of tool for final finishing and checking concentricity on larger engines and it works well. Taking one of the Dremel stones removed it from its shaft with a little heat and re-epoxied it to one I had...
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    Looking for inexpensive carb for trial running of Seal Major 30cc

    Thank you so much for the info everyone. I think I might have lucked out. Digging through some old model engine parts I found a carb off a Saito 30 or 40 four stroke. Bore looks slightly over 1/4" with spray bar across. Had it sitting around for twenty years but never been used.
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    30cc Inline Twin 4-stroke Engine based on Westbury's Wallaby

    Thanks, nice work. I have not made gears yet! 👍
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    Looking for inexpensive carb for trial running of Seal Major 30cc

    Irvine 1750 jetstream? I found this one but cant find any bore specs. Any advice on what bore should I be looking for for this size engine and where I could find suitable carbs. Thanks I'm in the UK
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    Major Seal 30cc Build

    Another part finished. The Seal Major oil Trough. Unfortunately I was so involved with it I forgot to photo all the pieces. Too much solder but it will work fine. 👍
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    I dreamed about this last night

    Building the Seal Major I had polished the crank journals to finish size with cut off strips of wet and dry, Yes I could have used emery cloth which may have worked better but the W&D was on hand in many grades finishing in 2000 grit. On inspecting the polished crank closely you could see waves...
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    mini V12 gasoline engine

    Amazing workmanship!
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    Major Seal 30cc Build

    Thank you Charles, I have started using Wellseal on some large engines I work on and really like it. 👍 Work progressing on the Seal Major engine. I decided to improve upon the manifold to block fixing by relocating some of these bolts so as they do not run into the head studs. I had already...
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    Getting in Trouble for Metal Chips in the House

    Years ago I new a welder that had a shop behind his house and I spotted 2 brown paper grocery bags stood open at his back door. I thought it was a brilliant idea. Think his wife had that well sorted and was happy to keep them at the ready.
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    Major Seal 30cc Build

    I plan to use gasket eliminator for the joint. I’ve used this Locktite product before with good success although not on anything this small. The water feed to the head will be external. 👍I’ll do a plastiscene check on valve to head interference Paul. Thanks
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    Major Seal 30cc Build

    Yes Paul from Hemingway's. I have not got to that part yet but will check it out. I plan to use the engine in a boat so was thinking of a multi coil setup and do away with the distributor for reliability. With the high prop shaft/ engine angle I plan to run a oil pump off the front of the cam to...
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    Major Seal 30cc Build

    Thanks Paul, 2 thou for from the bottom of the skirt to just below the second ring and 3 between rings, 4 above. 👍 looking to reduce piston rock to a minimum. I assembled with no rings to check for clearances and any tight spots. Not bad but room for improvement me thinks. I decked the block...
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    30cc Inline Twin 4-stroke Engine based on Westbury's Wallaby

    Interesting! I've been wondering how to approach the valve seat angle cutting and how wide to make it. I build many small Honda engines and they make this tool which works well for final seat finishing. I plan to fashion something similar in miniature. For reference OS engines use quite a narrow...
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    Major Seal 30cc Build

    Absolutely Paul. This has been the most complicated part so far and I must confess I was a little gun shy by the thought of having to bin another. I will get the engine running and see how the cam holds up. Had a good day yesterday and got the new cam finished except for some smoothing and...
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