Briggs and Stratton 3HP - Hot Rod Engine 

They have that old school valve timing that you can hear. That cam profile is aimed at making low end torque way below 3000 rpm.

Thanks buddy! Flatheads are sure addictive, you can't be into cars or motorbikes or anything mechanical without messing with at least one flathead! Thanks for the comment about the air cleaner, I might need to make another for my 2HP! -SmallEngineSmith

SmallEngineSmith hey nice motor i rebuild those engines my self i have a original '69 taco minibike with a 2hp briggs check out my channel it has the bike and motor on it

Picked up a '69 Briggs 3hp a week ago...going to restore it and use for a mini bike....can't wait to say "It's a '69 Briggs"...LOL

So have I been messing with them since the 1970s...still got 1 leftover, Trev New Zealand

+Ras dread It sure does!

poulan Piper i

where would you find a racing cam for 3 horse or any performance parts at all for it all ican find is the 5 hp stuff

Better off getting rid of the butterfly carb & putting a Chinese slider carb on it: 19mm for 3.5hp & 22mm for the 5hp you'll never look back & makes it easy to hook up a throttle cable too. Trev New Zealand 🤗🇳🇿

@@drewfields4626 Send your stock cam & Tappets to Isky cams.Trev NZ 🤗🇳🇿

Well that would be a hell of a build for a 3hp but unless you are a machinist with alot of resources this will simply be an imaginative engine since there is literally nowhere or nobody that to my knowledge has ever produced such parts as you plan to use. If you know where these can be found please let me know.

Very cool! I'm yet to own a 6BS but own some 6BH engines for rotary mowers :) I find the early Briggs like yours are somehow better quality (different metal mix in the casting?) and last much longer than the 70s Briggs engines. Good luck with the bike!

Hey man, sorry for the late reply, I thought I had kept track of all the questions here but apparently not! If you are still interested, I can explain how I connected mine. Firstly if you are planning to use the original air filter, you might find that the raptor throttle linkage will hit it. To connect my throttle, I found a perfectly sized machine screw that replaces the original, as it is too small. The original screw that holds the throttle lever and kill switch has a neat washer that when flipped around perfectly seats into the raptor linkage. Two of these are perfect for the throttle. Then I used some welding rod to make a small linkage from the throttle butterfly to the raptor linkage. That's the best I can explain it for now, if you have any more questions about it feel free to let me know! I'd be happy to help out.

Also, I could probably get some photos of one I did more recently on my Tru-Test mini bike. Cheers

Their Known as Decksons & their not Aussie built , their made in Taiwan & sold in Aussie....I have a Rockhopper & came with a 3.5hp Techumseh, Trev New Zealand

@@smallenginesmith1226 TruTest, that's Kiwi lol

@@trevinskiking2165 I'm a bit of a tru-test collector myself. Deltek/Deckson are the same company, you're right about Taiwan manufacture. They had even made them as a "Ding-How" and sent them to the US for sale. Cool little bikes!

Probably have to replace the shaft if you can.

Hey man, sorry about the late reply. Your engine will be from some industrial application and will be a heavy duty I/C engine (these are better for their cast iron bore and ball bearing crankshaft. It was never designed to run a clutch, so you could either get one machined in or find a replacement crankshaft.

Don't mess around Liam, do what I'm doing pull it down & take the Crank to a general engineering shop & get be them to machine the crank for a std crankshaft key & you can get them to make a matching sleeve up if the diameter is too small.Goodluck.Trev New Zealand 🤗🇳🇿

Typically I just drill and tap them, takes me all of about 10 minutes. Best one was when I didn’t do up my set screws on my Lil Indian minibike, and as I stopped, the clutch departed and spun off down the street on its own. If you do up the set screws nice, and even drill a small countersunk hole for them to sit into, you shouldn’t have any issues :)

SmallEngineSmith, well it already has a predrilled hole so The hard work is done so I'm going to tap it, But your clutch story had me laughing!!

I found a guy with a bunch of 4 horse power Briggs blocks for 20 dollars brand new on eBay he ships anywhere they are still in the box to

If your interested let me know I just got mine in today I’ll share the link if you want

@@billywaltman3206 what model number are these. I may be intrested

I can't quite remember the exact number, but would strongly suggest getting a Champion plug, as the 4 NGK plugs I put in these motors very quickly failed! Not sure why, but I'd go down to Bunnings, Supercheap, or SES NZ (Online Site) and purchase a Champion J8, CJ8 or RJ19LM plug. These are the best for a Briggs and I run them in everything from 1940's Briggs to the new stuff. Hope this helps, if you have any other questions feel free to ask! Cheers.

If you think champions are the best I urge you to try a Denso U GROOVE. Very impressive. I used to be a champion fan until I tried NGK then I finally tried Denso and I'll never look back.

Still havent looked back. In fact I am still brutally running this same exact Denso that I picked up out of my grandpas foldgers used spark plug can collection daily. Everyday at least 2 hours in heavy race condition type running. Like you I wouldn't make it a quarter mile on any other brand of plug new or used. Not sure why but I give you my word Denso wfs-u series plugs match these flatheads.

Yes, that was a common colour for these Briggs, it is usually used to indicate the possible year of your engine, but makes it no different from any other

Gold and grey most commonly indicates that it was a warranty replacement engine. On occasion a customer would order their engines on of those two colors but for the most part that is what they are. Just figured I'd share that with you all. Nice to know even if it doesnt matter as far as performance goes.