carb problem i think

[VADER8674]

HEY GUYS ITS ME AGAIN <br />TOOK THE SUNBIRD OUT TODAY THOUGHT I HAD IT READY FOR THE WATER I HAD IT IDLEING AT 1000 RPMS ON MUFFS AND THOUGHT SHE WAS GOIN TO COME DOWN IN THE WATER BUT IT DIDNT I TRIED TO ADJUST THE IDLE BUT WITH NO LUCK EVERY TIME I WOULD ADJUST IT DOWN IT WOULD DIE AND JUST BEFORE IT WOULD DIE IT WOULD OVER PUMP GAS SO THAT IT STREAMED OUT THE FRONT OF ALL 3 CARBS I HAVE REBUILT THEM BUT THEY WERE MY FIRST REBUILD DID I DO SOMTHING WRONG IS THIS A TIMING ISSUE AFTER I LET IT WARM UP IN THE WATER AND IT HAD DIED A FEW TIMES IT WOULD NOT START WITHOUT THE IDLE LEVER ALL THE WAY UP IF SOME ONE CAN POINT ME IN THE RIGHT DIRECTION ILL GO THROUGH IT WITH THE MANUAL AND SEE WHAT I CAN DO<br /><br />1985 70 hp rude e70tlcos sorry about the caps

 

[VADER8674]

Re: carb problem i think

back on muffs boat idles at 1000 shifts into gear and revs good without dieing no srteaming is this back pressure changing the performance<br />im at a loss

 

[Brew2]

Re: carb problem i think

I'm no expert, but if you are getting gas overflowing out of the carbs, I would think that either your carb floats are sticking or they have been set at much too high a level.<br /><br />As to why they would overflow in the water and not on the muffs....I dunno.<br /><br />I'd start by double checking the float levels and needle valves in each carb. Hopefully by then someone else will be along with some other thoughts.<br /><br />Good luck!

 

[tashasdaddy]

Re: carb problem i think

your'e forgiven this time about the caps. when you rebuilt the carbs did you soak the overnite, blow out all orifices w/ compressed air, and use a rebuild kit. sounds like floats to high. the engine is flooding is why the fast idle lever has to be up to start. in general low speed idle screws have to be fine tuned in the water. 1000 rpms is to fast for shifting, should be under 800. post back and we'll go from there.

 

[Silvertip]

Re: carb problem i think

Fuel running out the carbs is not a timing issue. Its a float issue. Are you sure you installed the inlet needle and seat properly? Before you reassemble the carb, tip it upside down and gently blow into the fuel inlet fitting. If you hear air passing, you still have something wrong as the fall of the float should shut off the flow.

 

[VADER8674]

Re: carb problem i think

yes i soaked ,but i did not blow i did use a kit with plastic floats.I got it down to 900 rpms one time and it and got it in gear it got up to 3100 rpms at wot and then suddenly dropped back to to 2000 any help is appreciated

 

[VADER8674]

Re: carb problem i think

upinsmoke i believe i got it right if that is the tiny needle screw above the carb throat i am not sure which part is which i just went by the brp schematic and replaced the way they came out can i remove the carbs and try the air passing test or is it to late.

 

[VADER8674]

Re: carb problem i think

2 out of three carbs have air passing so does this mean i should rebuild them again and if so how do i keep the same problem from reoccuring<br />it has been sitting about 3 months since the last carb rebuild could this have caused the floats to <br />stick

 

[clemsonfor]

Re: carb problem i think

If you can blow through them that means that the float is set to high and does not allow the inlet needle to close or form a tight seal stoping the fuel from flowing into the carb bowls. This is where the problem of fuel comming out of the carb throats comes from. I don't beleive 3 months caused that especially if they sat dry w/no gas in them. If you went through the float setting instructions and beleive you set them corectly tap the bowls with a screw driver and see if this frees the floats. If no difference you need to take them appart and set the floats again per the directions of almost level when the carb is held upside down.<br /><br />-nate

 

[VADER8674]

Re: carb problem i think

would this also cause the 2000 rpm drop t wot

 

[clemsonfor]

Re: carb problem i think

i don't knoe if i understand that question? Do you mean if it sucks air at wot you would be running 3500rpm vs. 5500 rpm (made up #'s). Because yes if your sucking air somewhere you will never make it up to peak rpms, because you cant get enough fuel with all the air the motor is sucking in.<br /><br />-Nate

 

[clemsonfor]

Re: carb problem i think

My reply was mixing your original problem u[p with someone elses. sorry. I beleive yes it could slow it down because it would be getting to much fuel and not enough air.<br /><br />-Nate