Someone knows fersure. Sneezing and idle screw does little

[Crosbyman]

the " missing millimeter tip" could be stuck in the ls orifice in the idle cct chamber under the dime size plug

get a new plug pull theold one out and check the side wall of the chamber where the tip normally controls the inflow of fuel to the top chamber... check utubes on cleaning these carbs.

also check the side channel feeding fuel from the carb bowl to the top idle cct.

also see older style carb low speed circuit

also see another carb side channel to the top idle cct chamber . carb clean and blow dry the side channel make certain fuel reaches the top chamber !!

at idle the crankcase vacum sucks the fuel from the carb bowl UP via the LS needle path via the (small) side channel and eventually sucks it out of the " drip" chamber with the 3 small holes. any crud in the side channel to the top will mess up idling

 

[arto13]

Find the missing part of the needle !

The missing part is in another needle!

 

[arto13]

the " missing millimeter tip" could be stuck in the ls orifice in the idle cct chamber under the dime size plug

get a new plug pull theold one out and check the side wall of the chamber where the tip normally controls the inflow of fuel to the top chamber... check utubes on cleaning these carbs.

also check the side channel feeding fuel from the carb bowl to the top idle cct.

also see older style carb low speed circuit

also see another carb side channel to the top idle cct chamber . carb clean and blow dry the side channel make certain fuel reaches the top chamber !!

at idle the crankcase vacum sucks the fuel from the carb bowl UP via the LS needle path via the (small) side channel and eventually sucks it out of the " drip" chamber with the 3 small holes. any crud in the side channel to the top will mess up idling
View attachment 395996

great stuff! i'm slowly learning
I have to buy a used needle because they don't make these anymore.

 

[arto13]

the " missing millimeter tip" could be stuck in the ls orifice in the idle cct chamber under the dime size plug

get a new plug pull theold one out and check the side wall of the chamber where the tip normally controls the inflow of fuel to the top chamber... check utubes on cleaning these carbs.

also check the side channel feeding fuel from the carb bowl to the top idle cct.

also see older style carb low speed circuit

also see another carb side channel to the top idle cct chamber . carb clean and blow dry the side channel make certain fuel reaches the top chamber !!

at idle the crankcase vacum sucks the fuel from the carb bowl UP via the LS needle path via the (small) side channel and eventually sucks it out of the " drip" chamber with the 3 small holes. any crud in the side channel to the top will mess up idling
View attachment 395996

i just read that the piece may be inside. okay, now i get that

 

[arto13]

Find the missing part of the needle !

i just read that the piece may be inside. okay, now i get that

 

[racerone]

Just like any old parts , they are not hard to find if you know where to look.

 

[cyclops222]

Buy the new needle.

 

[cyclops222]

Did you ever change that thermostat? After testing it with a thermostat and apot of slowly rising water temperature ?

 

[arto13]

the " missing millimeter tip" could be stuck in the ls orifice in the idle cct chamber under the dime size plug

get a new plug pull theold one out and check the side wall of the chamber where the tip normally controls the inflow of fuel to the top chamber... check utubes on cleaning these carbs.

also check the side channel feeding fuel from the carb bowl to the top idle cct.

also see older style carb low speed circuit

also see another carb side channel to the top idle cct chamber . carb clean and blow dry the side channel make certain fuel reaches the top chamber !!

at idle the crankcase vacum sucks the fuel from the carb bowl UP via the LS needle path via the (small) side channel and eventually sucks it out of the " drip" chamber with the 3 small holes. any crud in the side channel to the top will mess up idling
View attachment 395996

Cannot thank you enough. appreciate the generosity

 

[arto13]

Cannot thank you enough. appreciate the generosity

I'm missing the o-ring(# not in pic) that's underneath #7 in pic.

 

[arto13]

the " missing millimeter tip" could be stuck in the ls orifice in the idle cct chamber under the dime size plug

get a new plug pull theold one out and check the side wall of the chamber where the tip normally controls the inflow of fuel to the top chamber... check utubes on cleaning these carbs.

also check the side channel feeding fuel from the carb bowl to the top idle cct.

also see older style carb low speed circuit

also see another carb side channel to the top idle cct chamber . carb clean and blow dry the side channel make certain fuel reaches the top chamber !!

at idle the crankcase vacum sucks the fuel from the carb bowl UP via the LS needle path via the (small) side channel and eventually sucks it out of the " drip" chamber with the 3 small holes. any crud in the side channel to the top will mess up idling
View attachment 395996

okay, i got carb in hand. noe i understand how the tiny holes work

 

[arto13]

Buy the new needle.

none avaialble. there's a marine salvage yard nearby. i was told to lookthere

 

[arto13]

Did you ever change that thermostat? After testing it with a thermostat and apot of slowly rising water temperature ?

i've been scared to, bcause a friend that's helping me says i don't put it back just right i could get leaks and problems. I'll look it up in my manual.

 

[arto13]

i've been scared to, bcause a friend that's helping me says i don't put it back just right i could get leaks and problems. I'll look it up in my manual.

okay, it looks simple. i will do it.

 

[cyclops222]

As with all repairs. Take pictures as you start and as you get ready to remove another part. I removed the thermostat. Had to stop for a day. I tested it in the stove pot. Then was unsure where the spring, gasket , very small pin wet back in sequence.. I called my mechanic for the sequence. He said toss the pin. Then walked me thru. Still running 20 years later.

 

[Crosbyman]

your motor is not old but the operating concepts are !!!
to read up on how carbs and old motors work you have utbes galore or
for $20 you can download the Johnson maintenance " bible" with 400 + pages of interesting reading and concepts to bring you up to speed on the modern stuff.
that is where those old pictures of carbs came from

up to you

1922-1964 Johnson 302231 Outboard Service Manual

Johnson Outboard Motor Service and Repair Manual # 302231 Tenth Edition covers all Models 1922-1964 .pdf download

watercraftmanuals.com

 

[saltchuckmatt]

"The 3 holes" Hmmm.....pretty sure I mentioned that. The 3 holes.

In fact if you go back to my last comment you will know an extremely easy way to test if the 3 holes are plugged. (Do they drain?)

Super easy. Why are you missing these easy clues?

 

[Crosbyman]

mower .... outboards....carbs work the same... basically

some have needles some have jets some have air orifices but they all work the same... they pulll fuel from the fuel bowl via 2 circuits HS LS

 

[racerone]

A carburetor is a simple / crude device that responds to air flowing through it.----And carburetors are not well understood.-----That is why for decades the rumour of a 200 MPG carburetor has been out there.-----Even with sophisticated computers and fuel injection we are not near the 200 MPG target.

 

[Crosbyman]

close up view old carb with needle adjustment
on newer models the bottom one is replaced with a small orifice jet everything must be 100% clean !!