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THAT is one of the best model engine projects I have ever seen !!!

Fantastic ! I have been very anxious to see/hear it run and it sounds great. I especially like how you approach things like a scientist. No doubt I will read this thread several times to digest the information within. The build certainly proves that the whole is equal to the sum of...

Lots of different brand snowblowers use a similar rubber tire against a disk like this for multiple speeds and reverse. Many youtube vids out there on repairing them.

I have a Microair soft start on a 2-1/2 ton heat pump. I installed it because I run off a solar power system most of the time and the start current of the heat pump was well beyond what the solar inverter could handle without tripping out. It worked as advertised BUT did not reduce the...

Wow, just Wow ! I always understood the theory that helical gears run quieter but your video really drives the point home. That is one of the nicest running hit/miss engines I have seen. Most model hit/miss engines do not have a very pronounced hit miss action like the full sized...

You have one of those little pencil butane torches in your toybox?

Dang ! A smoke leak detector, you have all the nice toys ! I have also heard of using small propane/butane torch, unlit, probing for leaks. Same effect as the carb cleaner method but cleaner. It might be worth a try just for good measure next time you are in running configuration. It...

Been pondering those symptoms. If this was a test question on a exam I was taking somewhere my best guess would be that there is air being drawn into the intake somewhere other than through the carb. The far open needle valve and nearly closed throttle plate are compensating for this. I...

Always amazed at your work. To call you a engine builder would be a huge disservice, you are more of a engine scientist.

Very nice running. The hit miss cycle is very pronounced.

Looking great. What do you use for a ignition module with that hall sensor?

Good luck, speedy recovery, look forward to your build posts continuing.

Hard to describe just how good it is BUT I think you came the closest.

You make this look way too easy ! I can't believe how fast you build a engine and how nice the end results are.

As said before, you can verify if you are close just by looking at the rocker arms and the crank throw (piston motion) while turning the engine by hand. Verify each of the 4 cycles by eye. If something is wildly out you will see it. It certainly sounds like something IS wildly out...

You seem very confused Brian. If the carb is leaking under the compression stroke then the valves cannot possibly be sealing ! Also, on a proper intake stroke it cannot possibly leak, there is vacuum in the intake, the only thing that would happen is it would suck air into any...

Yes ! That plus visually check that the intake valve opens as the piston starts descending in its bore and closing near the bottom. Anything radically wrong with the timing can easily be seen visually. Just a visual check on the "suck, squeeze, bang, blow" theory goes a long ways in...

That sure sounds opposite of what you should expect. Bubbles blowing out means pressure where the carb should be at vacuum. Don't even need a carb in place to develop vacuum at the intake ! Valve timing highly suspect.

You already seen how little powder is used to coat parts. You will save quite a bit over using rattle can paints too.

Didn't realize your gas line was 3/8" OD. I am guessing this is for the lines to the cylinders from your carb, not for the fuel tank to the carb.