mikerecike

New diaphragms & gaskets. Ultrasonic clean. New fuel line & filter. Will only rev if virtually fully choked. No hidden adjustment screw on this carb: WYL 52A 838. If I could find a replacement carb I'd prob change it. VID_20240702_175133.mp4 What I've found seems to have primer bulb and return nozzle. Or no bulb & still return nozzle. Anybody dealt with one of these? I raised metering lever thinking it was struggling to get fuel - no change. In the vid forward is full choke. VID_20240702_175133.mp4 VID_20240702_175133_0_COMPRESSED.mp4

Recently fitted one of these chinese carbs. Before disassembling to check does anybody know if these caps are limiters? I assumed they were just like a screwdriver funnel to make tuning easier? Cheers.

Carb cleaned - no difference. It turned out to be a compound issue - spark & fuel. Spark seemed weak. Swapped out the old spring cap for a crimped cap. Spark miles better. Bought my first fully adjustable H/L Chinese carb to replace the Stihl Zama. New fuel lines & filter & she's back on form - poss slightly better for not being forced to run too rich. Still takes too many pulls to start but I can live with that. Quite chuffed we're back in business.

Thank you for flagging that lot up. Thanks to previous contributors too. Gonna clean the carb as step 1.

Admittedly it's done some mileage but only has 1 L screw for tuning. What's the knack with this / what's the tuning process. Keeps dying / bogging when revd up. Can't find a sweet spot with screwdriver. Haven't had the carb off for a clean yet but tempted to buy a Chinese carb with H&L screws. Access is currently only for the L with a screwdriver so may need to alter the external grommet/ dust cover to access both. This carb is a Zama Stihl. Good idea to change? Thanks folks.

That looks really promising, cheers. - can't see any immediately available .....

Yep new to me too. The circumference fits a couple of carb screwdrivers I have but the hole does not.At first I thought it was like one of those EPA plastic obstructor caps but scratched it & it's all metal. Onwards .... 👍

All good suggestions - thankyou MacPherson - appreciated

Better pic of the H screw. Certainly don't have that screwdriver - (if anyone can identify it)

Cheers Spud. Appreciated. I will check the fuel filter and then try to get a suitable tool in to adjust that black high screw on the side - anti clockwise to richen. If still prob I'll dismantle the carb & check / clean that gauze filter.

So that's the screw to richen the mixture then I guess - I'll take another pic tomorrow & see if any of my carb screwdrivers fit. Cheers.

Any help on how to adjust this (presumably Chinese) carb on Screwfix titan multi tool pls. Have adjusted other barrel carbs down the top in the past by digging out a plug and then using micro flathead. This seems to have its own design. Also has side screw??as pictured. Not sure what that does. Cheers folks. ( It's starved of fuel & so dying at full throttle).

Cheers Ratman - not sure but closest so far - cheers - the tip is not the same & the shaft seems thicker. (ordered one to try). What is great about mine is that it stores energy like a spring (you can feel shaft twist slightly) then unleashes it. The full width head (once it opens out it doesn't come back in) also seems to deliver more torgue . I read a paper on this years ago & that bit of extra width works wonders Had a minor meltdown a couple of yrs ago when I mislaid it

Often you need a Belleville washer, not a normal washer. A Belleville washer looks like a washer but is more of a coned spring - they're used for a reason.

Yep - typo - guessing it's from the Wera stable. Had a look at the Wera website - nothing like it there. Cheers.