reoccuring problem, over and over..everytime i

[vandancouver]

ill let you know what i have. its a 5.5 briggs and stratton flathead. running a comet torque converter. its on a yerf dog 285..

the things ive done to my motor is straight pipe, air filter, shaved eyebrows, port and polish, just the real basic stuff ( i got kids who ride this) *my fast kart is running just perfect hehe

well anyway, this is a off road kart, i put some suspension on it, etc..

everytime we take this thing out for about a half hour to hour of good fun riding, *usually dirt* it dosent run well afterwards. in the past when this happens i take the carb apart, clean it well, and i even changed the diaphram. then it worked fine. this has happened twice.

this weekend im running it and we shut it off to work on something else, then we start it up again later and the thing idles decent..not as great as before.. so i cleaned the carb, changed diaphram, changed head gasket, spark plug, air filter, carb to block gasket, fuel to carb gasket..alot of maintence. didnt help it one bit.

what could my problem be? when i step on the gas even past 1/4 it chokes out and dies. the idle adjustment screw is set to factory...any ideas/

 

[jr dragster T]

By what I hear sounds like the motor isn't getting fuel. Go threw the carb again and let me know.

 

[sideways]

step 1: remove carby

step 2: smash carby into small pieces, set on fire ect ect

step 3: get a real carby with a float bowl ect, maybe something like whats on honda clones so you can still keep the gov

step 4: atach new carby (could be tricky)

step 5:tune engine

now you have an engine that runs better, is easier to start, is more powerfull and you will probably never have to rebuild the carby agian.

as far as im concerned briggs and stratton cant make a carby to save thier life. (this should generate a few comments hehehehe)

Hayden

 

[vandancouver]

i went through the carb twice already. they are so simple how cna you go wrong? the fuel is new, topped off in the tank. the carb was off, i took off everything and cleaned with carb cleaner. put a brand new diaphram in, all new gaskets that have to do with the carb connecting to the head, gas tank, etc..i completely cleaned it. im not sure what the problem is, im kinda thinking a partially/sheared timing key? i havent checked that but not sure...it seems like the engine is being starved of fuel, but how can that be possible. the things that go into the tank are perfectly clean..gas is clean, tank has been drained and re filled..

help me out here tyler

 

[vandancouver]

sideways: the carbs are good for what they are/ usually its something simple. ive never owned a honda clone/honda

briggs and stratton flathead only, old school baby

 

[vandancouver]

thanks for inpu tthough

 

[BriggsTwins]

Hey Vandan, check your compression, and if you can pull the mixture screw seat from the carb and check that. very seldom a blob of crap works itself into one of the ways and clogs, try high compressed air to blow ways and feed lines clear.

 

[solomon]

well what i would do is use the kill switch and kill the egine so ther is no spark. Then pull the rope appx 20 times, pull the plug and see if its wet, if it is then carby is most likely not an issue, but if its dry then your not getting fuel.. I would then proceed to pulling the flywheel and checking the key, it may be just partially sheared. ALSO, before checking the key, if u put a bit of gas in the carb and full choke it does it run?

 

[EagleTalons]

Do you have all of the diaphragm parts put back together correctly?

 

[vandancouver]

eagle: the diaphram is on there correctly. spring, spring cover, gasket with bubble facing out, if you know what i mean.

briggstwin: i dont have anything to actually do a compression check with. it seems good, but i dont have any kinda poundage tester or anything..

soloomon: i sprayed starter fluid inthe carb and it still takes about 5 pulls. i didnt try using the kill switch yet and checking the plug

 

[residentg]

Sounds like junk in the gas tank

flush out the tank

the plastic fuel supply tube should be bend forward slightly. this is done so that the screen will not be flat against the bottom of the tank and to allow fuel to flow better

clean the carb one more time

 

[EagleTalons]

Have you checked your valve clearance?

 

[freakboy]

Hey sideways you got it wrong tejunkshe cant make a carb to save there life, my freind has a snow blower he got last year brand new used once and was winterized(for summer lol) and we tryed starting it last weekend lol didnt work at all.

 

[jr dragster T]

Severely advancing the timing will also cause the problem you are experiencing. But most likely at that point the recoil would probably be jerking back in quite a bit.

 

[vandancouver]

i havent flushed the tank out yet, i havent checked the timing key, and i cleaned the carb three times already, and bent the tube forward.

how would the valve clearances change at all though?

 

[Kenny_McCormic]

Running too lean perhaps? For these things to run right without the governor they need to be set to run REALLY rich at idle, this helps lack of an accelerator pump off the line and keeps it properly fueled at high speed. Even then they tend to die if you stomp on the gas, nature of the beast.

When I had a 5hp briggs cart it couldn't be left idling more than a minute, it would flood out, but when I got after it that motor would push you back in the seat and light the tires in loose stuff.

 

[modelengineer]

I don't know about Briggs, but on motorbike engines if you change the exhaust to a straight through design, and/or put on a high flow air filter, you need to re-jet to make it richer. Without a rejet the engine runs VERY lean due to the extra air flowing.

 

[vandancouver]

like i said guys...i did all this stuff then fine tuned the engine and have ran it for months. just lately it started having these problems. the govenor is still on it also.

 

[BriggsTwins]

try different gas stations

 

[EagleTalons]

I had the valves sink into the block on an old briggs of mine. Ran awesomely after I got that adjusted one pull starts.