[Diy_efi] EFI for Briggs motor

[James Seabolt]

As fond as I am of Weber carburators, I despise these junky carburetors 
Briggs and Stratton and Techumseh uses on their small one cylinder engines.

The latest Walbro carburetors don't even have adjustment screws other than 
the idle speed!!

The other day I going to play around on my go-kart and couldn't keep the 
thing running. I seem to think all the bouncing around has messed up the 
float level. I just rebuilt it last year and it worked great for awhile. 
When I took it apart then, I noticed the float level was off so I had to 
adjust it. I think the same thing has happened this time.

I mentioned this awhile back when I was trying to get my Weber DFTA to 
accept the turbo I installed on my Yugo.

This may be too simplistic for a 4 cylinder car engine but what about a one 
cylinder small engine?

I'm revisiting my idea of using a 555 timer chip to control the pulse rate 
of a single Bosch injector. Use a potentiometer to adjust the mixture to 
increase the frequency the injector sprays and the tach single from the 
coil to control the pulse width.

The carburetor will still be there. I'll only be using it as a throttle 
body and the choke. Basically just to replace the needle/seat and jets.

So does this sound too simplistic? If you have ever taken a lawnmower 
carburetor apart there is not much too them.


James Seabolt
Tennessee, United States
Homepage --->>> http://users.chartertn.net/jseabolt/

2003 Subaru Baja
1980 FIAT 2000 "turbo" Spider
1968 Ford Fairlane 500 (Not a Ford Galaxie!!)
1987 Yugo GV 1500cc also turbocharged









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