Hey guys. I'm building a mini bike in chopper style and I'm having trouble with the engine. It's a briggs and stratton 2 hp horizontal shaft engine. I've been working on it for about 3 months. I fixed a stuck open exhaust valve, I cleaned the Carb out and got a good fuel flow,it's been oiled, I cleaned the magneto,I took off the old muffler and will put the new one on it once the engine runs, it has a great spark (shocked myself close to numb), but the engine just won't run. I pull it, I can see exhaust come out, yet it won't keep running. Any help is greatly appreciated!
Briggs and Stratton 2 hp rebuild
- Thread starter ElectroMax5
- Start date
- Tags briggs rebuild stratton
Hello ElectroMax,
First I have a couple of questions for you..
Does your carb look like/similiar to this Vacu Jet carb with no side cover??
[/IMG]
How good is the compression?
First I have a couple of questions for you..
Does your carb look like/similiar to this Vacu Jet carb with no side cover??
How good is the compression?
Ok you have spark, compression, clean carb, and vented cap. Did you inspect the carb to tank gasket and carb to block gasket. It is critical those form a air tight seal in order for this carb to operate properly. If those gaskets (especially the carb to tank gasket) show signs of wear, it's time to replace.
How many turns out is the fuel/air mixture screw? Generally for starting puroposes it should be 1.5 turns out from closed. In my experiences, the Vacu Jet carbs rarely go bad. So I'm thinking it may be something relatively easy to fix. Also, you may need to play around with the idle screw and possibly open the throttle up slightly to get the engine started.
How many turns out is the fuel/air mixture screw? Generally for starting puroposes it should be 1.5 turns out from closed. In my experiences, the Vacu Jet carbs rarely go bad. So I'm thinking it may be something relatively easy to fix. Also, you may need to play around with the idle screw and possibly open the throttle up slightly to get the engine started.
Carb to tank is fine now. I had a hunch today that it was the ignition timing. I was correct. I took off the flywheel, cleaned the condenser and point, Oiled it, put it back together, and gave it a few pulls. Didn't run. I decided to give it one last pull with the throttle open slightly. IT LIVES! :laugh: , I let it run for a little bit, but i don't have a tachometer to tune it. Ah well. Now I just gotta figure out how to make it run again! xD
you can get those little electronic tachs that clip on to the plug. about as sophisticated as a $4 calculator. theyre maybe like $20.
You should have a sense of when the motor sounds like its idling.....not revving or stalling.
1982 Briggs & Stratton 4Hp 187cc Engine Runs Good - YouTube
some kids video but this is what youll be doing.
You should have a sense of when the motor sounds like its idling.....not revving or stalling.
1982 Briggs & Stratton 4Hp 187cc Engine Runs Good - YouTube
some kids video but this is what youll be doing.
ok. I finally got frustrated and put it off for a few months. well, i started working on it again. I redid the valve and points and condesner timing and put another make-a-gasket on it. And I got it running again. Problem is it was only for 4 seconds. I think the problem here is the gasket. I want to order the correct one instead of making it. I can't find the serial number on it. I checked the flywheel. Under the grille, there were the letters AJQ. On the opposite side between the magnets there was a 56 and on the other side of the Magnet there was a C. Can you please help me find the serial number?
Nevermind! Found it!!!
Nevermind! Found it!!!
Last edited:
I believe that you can get a complete kit for your carb that includes a new needle, jets, and gasket. Also, if the engine still won't stay running, check the pickup tube that goes from the carb to the tank to suck up the gas. One time my pick up tube had a hair line crack in it and it was sucking air and not gas. :thumbsup: