What motor are these?

[gokarteddie]

What motor are these

 

[JTSpeedDemon]

Those are racing Briggs flatheads!!!
Pro built, too!
Do you plan to use or sell them?

 

[gokarteddie]

Are they 2 stroke or four stroke? And no I can buy all of them though from this guy

 

[mckutzy]

4 stroke for sure... they have valves...

For How much?

 

[itsid]

briggs flatheads, yes..
raptor flywheel cover yes..
pro built?? who knows!?

could be stock 5hp flatheads with a swapped over air shroud
added flywheel cover for "the looks" etc.etc.

and these are all four stroke engines of course.

none has a carb... sooo all mystery engines..
turn them over by hand and see if you hear something "nasty"
to negotiate..

ideally bring a carb and fuel bottle and fire them up.
that is.. IDK what the guy is asking.. but mystery engines can be anything from a
great truely blueprinted raptor in superb condition to a dead stock flathead paperweight.
and anything in between.. so prices can be just as widely spread
(from less than 10 to way more than 100 bucks a pop).

'sid

 

[vybrano]

4 stroke for sure... they have valves...

For How much?

On which photo and where are you able to see valves?

 

[JTSpeedDemon]

Duh.
They are Briggs and Stratton 5 HP, 4 stroke flatheads. Racing modified, from the looks of them, but it could just be swapped blower housings for looks.
The block design is widely recognized(2 stroke valveless engines would look way different, and trust me, I would know, since I have one!
If you want confirmation, you can just Google "Briggs and Stratton 5 HP flathead" or look at pictures of the engine on my kart, the "Ultimate Yard Kart" build off thread.

---------- Post added at 03:35 PM ---------- Previous post was at 03:33 PM ----------

And 2 stroke (valveless) engines would NOT have oil fill and drain plugs, since 2 strokes have oil mixed into the fuel for lubrication.

 

[Randy H]

The black engine is a Raptor block.

 

[Hellion]

Those may or may not be a bargain. They are incomplete (no carbs, no fuel tanks, etc) and unless you can get them for cheap, they might be more than you want to mess with. The blocks could also be toast, which I pretty much expect them to be.

On which photo and where are you able to see valves?

Hey now, that's a good point. No valves are visible. Lots of assumption going on in this thread...

All kidding aside, we can certainly say they appear to be Briggs flatheads (with some Raptor-esque parts) and be done with it.

 

[Randy H]

They don't only appear to be Briggs flathead they definitely are.

One block is a Raptor block, for sure. It's no pseudo Raptor.

The others may be as well. Need more pics to determine that.

Not a huge difference between blocks at any rate. But there are differences.

Of course any used engine is a pig in a poke.

A Briggs intake part # 691922 and a PZ19 or PZ22 (Ebay China knockoffs of the more expensive Walbro) is a nifty combo.

 

[itsid]

..And 2 stroke (valveless) engines would NOT have oil fill and drain plugs, since 2 strokes have oil mixed into the fuel for lubrication.

TWO STROKES ARE NOT VALVE LESS

there I yelled *giggle*

No all kidding aside, two strokes do use valves.. very different ones than four strokes I admit, but valves.
reed valves, rotary valves or piston port (valving) they must in order to work properly

And vybrano, surely the valves cannot be seen (very few open valve engines out there.. haven't seen any on a kart yet)
but if you look very closely at the 2nd picture you can see the valve cover

'sid

 

[JTSpeedDemon]

Yes, I should've clarified.
This is what I meant by valveless: lacking cam operated valves.
I should've clarified, and that's my bad.

 

[itsid]

Yes, I should've clarified.
This is what I meant by valveless: lacking cam operated valves.
I should've clarified, and that's my bad.

Oh JT don't act like you knew..
and then proving you don't ...

Still NO: I for myself tend to forget about two stroke diesels myself..
which I'm afraid at times use cams and poppet valves just like you'd see on a four stroke..
(loop scavenging as well as uniflow scavenging two strokes can have poppet valves and cams to control them.. I only ever seen them on diesel two strokes.. maybe there are gas variants as well *shrugs*)
yes we rarely come across those (especially on this site),

but it's simply a rookie mistake to say you know,
because of the valves! you do not!

You likely know a briggs flathead when you see one, sure;
and you are correct that it is a four stroke engine, no doubts.
But don't try to explain that "seen it.. know it"
with some technical specs that draw you in the rabbit hole of misinterpretation.

I was holding back on intake vs exhaust port positions for example for that very reason.
while with two strokes they're seldomly on the same height,
(intake is usually lower down the cylinder for the engines we usually deal with)
it's still nothing you can rely on.
Since as soon as there's a cam operated valve in play it can be just at any height again.
Same for the exhaust port
which on two strokes again sits 'usually' lower down the cylinder wall than on a four stroke

So no, sorry, but you're off once again
(which I think is at least partly my fault with the "different ones than four strokes" claim above.. which unfortunately is not true if we take all two strokes into account)

'sid

 

[mckutzy]

Pardon me.... they lack valves in the traditional sense..

 

[BigWes]

[SNIP] These things have been out of production for years. In my location salvage parts are scarce at best and always overpriced, especially if someone is looking for oem fuel parts like a fuel tank carb combo. You can spend lots of money and wait time sourcing parts for these things. Not an issue for a collector but if you are in a hurry to ride or impatient it could become one. Just things to consider not to mention what has already been paid at your feet. Needless to say don't jump because of someone else's enthusiasm. Good luck.

 

[Tpdingo]

Oh JT don't act like you knew..
and then proving you don't ...

Still NO: I for myself tend to forget about two stroke diesels myself..
which I'm afraid at times use cams and poppet valves just like you'd see on a four stroke..
(loop scavenging as well as uniflow scavenging two strokes can have poppet valves and cams to control them.. I only ever seen them on diesel two strokes.. maybe there are gas variants as well *shrugs*)
yes we rarely come across those (especially on this site),

but it's simply a rookie mistake to say you know,
because of the valves! you do not!

You likely know a briggs flathead when you see one, sure;
and you are correct that it is a four stroke engine, no doubts.
But don't try to explain that "seen it.. know it"
with some technical specs that draw you in the rabbit hole of misinterpretation.

I was holding back on intake vs exhaust port positions for example for that very reason.
while with two strokes they're seldomly on the same height,
(intake is usually lower down the cylinder for the engines we usually deal with)
it's still nothing you can rely on.
Since as soon as there's a cam operated valve in play it can be just at any height again.
Same for the exhaust port
which on two strokes again sits 'usually' lower down the cylinder wall than on a four stroke

So no, sorry, but you're off once again
(which I think is at least partly my fault with the "different ones than four strokes" claim above.. which unfortunately is not true if we take all two strokes into account)

'sid

Also don't forget about 2 stroke with rotary reed valves....as the ones seen in the trabant engine.

 

[Hellion]

They don't only appear to be Briggs flathead they definitely are.
One block is a Raptor block, for sure. It's no pseudo Raptor.
The others may be as well. Need more pics to determine that...

Well Randy, aside from the one obvious Raptor block (not drilled for a governor), we can't assume what the others are from the insufficient pics provided. That's all I was saying.

The Raptor block may not have Raptor (or racing spec) innards. It could be a Raptor block with standard 130XXX series parts inside--we really don't know what the OP is being offered

Did you buy them or not, gokarteddie?

 

[Budget GoKart]

Well i think if they still work why they might have been taken off of a racing kart, is either they have some issue ,or the racer that used them swapped it out for a clone engine because of new rules in the sport. Id take the gamble if they are cheap if not oh well the parts are worth something at least. Also correct me if im wrong but arent 49cc weed whacker engines valve and camless

 

[karl]

???

"You can spend lots of money and wait time sourcing parts for these things."

All US sellers

 

[JTSpeedDemon]

Yeah, Briggs are actually extremely easy to source parts for.