Recent content by Oilpan4

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    Predator 459cc vs 420cc questions

    Don't delete the governor. Just turn it up. I have a predator 459cc, it's got plenty of power. It's also got a big chinesium flywheel would really suck if it came apart at some insane speed. It's also got a regular cast connecting rod, hopefully that would come apart before the flywheel.
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    Reverse engineering ohv to be more like flathead

    That would be kind of cool. I have a horizontal shaft Kohler 196cc that appears to have a paper thin stainless steel head gasket too. I was going to put a think gasket on glad I checked before ordering stuff.
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    Reverse engineering ohv to be more like flathead

    Stock gasket is like a graphite metallic steam gasket and appears to be at least 1mm thick. Yeah copper will definitely work and I could reuse it like 50 times as long as I anneal it. Aluminum will be cheaper and the whole engine is made out of it so it should work too. For now I reused the one...
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    Reverse engineering ohv to be more like flathead

    I would probably have to cut one out of thick metal foil by hand, clean up the edges with a Dremel, ect. Hopefully a better, smaller cc head on a 160cc block, timing advance and a big muffler will make decent power. This is going to be a lawnmower converted to something like a walk behind DR...
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    Reverse engineering ohv to be more like flathead

    I replaced it with a normal looking head off a seized 140cc engine. The engine I'm working on is a 160cc. Now only if I could find a thin head gasket for a vertical shaft lawnmower engine... It does seem louder with the 140cc head on it.
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    Reverse engineering ohv to be more like flathead

    No, I wasn't talking about converting an ohv to flat head, the head pictured just reminds me of the flat head design with the head blocking the area around the valves. That's all.
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    Reverse engineering ohv to be more like flathead

    Cylinder head from a 2017 Briggs lawn mower.
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    Reverse engineering ohv to be more like flathead

    Whyyyyyy?
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    Tachometer readings seem odd

    Usually there's at least 2 settings: 1 spark equals 1 revolution or 1 spark equals 2 revolutions. I didn't even read the directions on mine I just assumed 1p1r was the one I needed and that 1p2r would read double and it did.
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    Is an 8 degree timing advance too much for a stock engine?

    This is probably running more like 28 to 30 degrees. If it does anything weird I'll put a bigger jet in it first since it might be a bit lean, as it doesn't want to stay running without some choke when I first start it.
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    Is an 8 degree timing advance too much for a stock engine?

    It starts and runs great with an additional 8 degrees of ignition advance. Haven't really tested it out yet. I also installed a tachometer/hourmeter. It was running about 3,800rpm, now it's running 4,000rpm. Also put on a better flowing Briggs and Stratton intake that uses 3 fasteners instead...
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    Build up a small block or go big?

    A gx390 with a backed off UT2 ignition coil and turned up to 4,000rpm should be plenty for a 25mph kart.
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    Is an 8 degree timing advance too much for a stock engine?

    This is just a super boring Kohler branded Honda clone with cast iron wheel keyed to about 20 ish degrees of advance.
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    Is an 8 degree timing advance too much for a stock engine?

    I have a bone stock Kohler 196cc engine, the RPMs are turned to 4,000 ignition is a single wire style non-digital. Normally I would toss on a 4, maybe a 6 degree advance key and call it good and not worry about it. Engine has been recarbed with a carb that has an adjustable air bleed instead of...
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    How do you cover your exposed velocity stack air filter?

    I just figure there's no point in the air filter catching dirt when the engine is not running.
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