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Rough low throttle on Lawnboy Dura Force Pro 6.5

I just picked up a Lawnboy Dura Force Pro 6.5 (10323). It starts easy and appears to run well at full throttle but low throttle is a bit sensitive; It's difficult to keep a strong low idle and replacing the spark plug had little effect. I was advised to clean or replace the inline fuel filter before attempting to adjust the carb settings but I do not see any inline filter. Is there such a filter on this model? If so, where is it located and can you also point out where the carb adjustment screws are? Are they be adjusted with the engine running or not running? Is there a carb cleaning fuel additive for these two cycle engines? Excuse the simple questions but I am not familiar with Lawn Boy mowers and do not have a manual or engine schematic. Thanks in advance for any assistance.

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Go to the Lawn-Boy Service & Support site to get a manual.
http://www.lawnboy.com/productinfo/mowers/index.html
The procedure should be in the operators manual.
Seafoam gas additive is a good one.

Posted on Oct 22, 2009

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IT HAS A WEAK SPRING THATS ALL IT IS

Posted on Sep 30, 2009

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Posted on Jan 02, 2017

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1 Answer

Husqvarna 125 BV how to adjust carb screws, yes I can turn them but how to start all the way in on both screws


I would think that the screws have limiter caps, so you cannot turn them all the way in.
1) put both screws at the maximum you can turn them out
2) start and warm up the engine
3) at idle speed, turn the L needle in till the engine speeds up (by itself) and then starts to lower rpms.
4) from that point, turn the L needle back out till engine raises and then lowers. Leave the screw in a setting that the engine sounds a little rough
5) use the same procedure with the H screw (at full throttle)
6) now throttle up from idle
does the engine pick up quickly? settings are good
does the engine stumble and then finally begin to pick up?
Then turn the H out about 1/4 turn. If needed for rough but smooth running, turn the H out again another 1/4 turn.
*Please Note: 2cycle engines should ALWAYS sound just a little rough at full rpms. NEVER adjust a carburetor so that the engine 'screams', you will not have an engine for very long at that condition.

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I need to download an owners manual 10323 lawnboy mower


Hi Nancy,
here is a link to a page that should help. It looks like you may have to purchase the download:
https://lookup3.toro.com/request/sendreq.cfm

Good Luck!
Jim

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1 Answer

Rough idle, bogs when I give it throttle then dies


Brad:

Go back to the carburetor adjustment screws and snug them down gently. Do not use force on those screws or you'll damage the needle valve seats. Turn both screws out one and a quarter turns out and start the saw. The motor should stay running.... if not adjust the screws until it stays running. Turn one screw in until you hear the motor start to stall, then turn that screw out just a little bit. turn the other screw in until the saw starts to stall, then turn that screw out a little bit. Now if the saw bogs at full throttle, turn one screw out one quarter turn. See if the saw runs at full throttle... if not turn that same screw in to where it was and try the other screw the same way. If you're good, you can adjust the screw while the saw is running to get the best full throttle run. This is not an exact science, and it takes time and many adjustments to get the saw to idle and run at full throttle. Good luck... and have patience.

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Where is the egine model number located on a Lawn


Go to www.lawnboy.com and input the model number of the MOWER and probably any of the serial #'s if you don't have yours. More options and info will pop up and you may get your engine model info from there. I hear that the Duraforce engines are all the same model?

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There does not seem to be a spark. I even put fuel


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How to tune and adjust carb settings on Lawnboy 2 cycle, 6.5 Duraforce slver pro engine? Throttle appears good at high throttle position but is not smooth throughout range and rough at low throttle...


First remove the inline fuel filter in the tank and replace it, before adjusting the carburetor. Also Be sure the linkage from the governor and to the engine has not broken or fallen off, next check the fuel pump bulb by removing the air cleaner and pushing the bulb in if you see a stream of fuel each time you push the button it's fine otherwise the check valve may be dirty and you will have to clean it to fix the problem. Also make sure the air cleaner is clean. After you check these items then you can adjust the fuel mixture screws turning the air mix valve firs and getting the motor to smooth out at low speed. Turn 1/8 of a turn at a time till you get the desired running range. Also check that the spark plug is nor dirty if it is clean and re-gap it if the electrode is worn out then replace the plug.

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1 Answer

How do i install the spring throttle on a lawnboy 10323


take the air filter off the spring is attached to the govenor rod to a fixed arm once attached the arm can be bent to tighten the spring or bent the other way slow the speed tighter the spring faster the speed there is another rod attached to the govenor rod to the throttle

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