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16 hp Briggs. runs uneven will not idle. changed spark plug and clean carb. get pops out of muffler. any suggestions on where to check next?

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Check the flywheel key. If you did not use the soak carb cleaner to clean carb i would get some and clean it again.
Sam

Posted on Jan 08, 2010

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17 hp briggs stratton ohc


Clean or change air filter. Clean, gap or change spark plug. Empty gas tank add fresh gas with Stabil. When spark plug is removed pull rope several times to blow out cylinder. Spray starter fluid in spark plug hole before replacing spark plug. Clean outside of carb so choke works freely. Spray starter fluid into carb breather hole with air filter removed and try to start. if running replace air filter and cover. If no start disassemble carb and clean. If no start replace carb.

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Low power when under load lt1024 cub cadet 24 hp els 725 ohv


always check spark and compression first spark needs to be blue and compression should be 120 but will barely run on 80psi if both are fine rebuild and acid dip carb also check muffler for carbon build up clogged muffler means no power

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I got a poulan po1742stb riding mower with a 17 hp briggs n stratton engine it was my dads and it hadnt cranked since he died which was bout 2 years ago so i had to replace the ignition coil and my wiring...


Thanks for stopping by...
When you said "cleaned the carb" - did you disassemble, and clean - or just spray carb cleaner into it?

Sitting for 2 years - the additives in the gasoline can leave a varnish that will clog the tiny jet orifice in the carb bowl.

You'll need to disassemble, and clean out the jet with a wire.

Popping and sputtering can be caused by a few things:

Old Gas - drain and refill with fresh.
Dirty Air Filter - Check and clean/replace it.
Poor Fuel mix/ratio - clogged Carb Jet or sticky butterfly.
Poor Spark - check/change the plug.
Fuel Vaccuum - remove the gascap - and start... the vent hole may be clogged. Clean and/or replace it if it starts running better with the gas cap off.
Clogged Fuel Filter/inlet screen - backflush the tank and the debris should wash back into the tank. Rinse out and re-install.

This is most likely a fuel delivery or spark issue.

Change the fuel and plug first... and give the carb a GOOD cleaning... then re-check.

Thanks!

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My Husqvarna 455 starts great and sounds great without pressure but when you put the saw under pressure of cutting it bogs down and runs up and down. I am not sure the problem. I have changed spark plug,...


If you haven't done so already I would run some spray carb cleaner through it. If the idle speed is okay then I would adjust high and low screws going very slowly about 1/16 of a turn at a time and run engine up and down after each adjustment. I would remove the muffler and clean the spark arresstor screen to get all the carbon deposits out of it.Carb. cleaner and a medium stiff wire brush work well for this. I would also check the vent in the gas cap to make sure it is open. I also use a product called sea foam in all my engines.For my chain saws I mix 5-6 ounces with 2 1/4 gallon of gas.It really does a good job of keeping everything internally clean. Hope this helps you. Thanks.

Jul 28, 2011 | Husqvarna , No.455 Rancher, 20" Gas -...

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Will not run at high speed and install new plug and change gas and clean carb


Check the fuel filter, air cleaner, and muffler for plugging. Check the condition of all fuel lines. Make sure your 50:1 fuel mix is fresh and thoroughly shaken just before adding to tank each time. The spark plug gap is 0.020". I'm assuming that you did not disturb the H an L jet settings. Hope this helps!

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Ryobi 700r string trimmer issue. Unit will not run. It will not even try to run. I have good spark and I swapped out the spark plug for a known good one. I put a tsp of premix down the spark plug hole...


Hi have you checked the carb for dirt?,does the primer bulb work?does the plug get wet?also have you tried to change diaphram/kit there is a company on ebay called smallplantsalesuk where you can get the parts,rgds

Sep 25, 2010 | Ryobi Garden

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Is the choke staying on perhaps? check spark and plug check airflow, get compression test maybe the oil/compression rings giving way... sounds like its getting hot and increasing fuel flow for some reason??? perhaps clean carb with some cleaner while running (remove air cleaner) spray directly into carby while running run at full throttle as you spray it will try and die ... relax on the spraying and see how it goes.. check air cleaner for blockages as the same time :) hope you get it working!

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If this engine has been sitting for awhile I would guess the carb. is gummed up and need a good cleaning. First thing I would do is try a fresh spark plug. Just because the plug looks good doesn't mean it is. If you have a fuel filter check this also. If it is getting fuel into the carb and has spark and compression I would remove the carb and clean it.

Hope this helps

Bob

Oct 23, 2009 | Briggs & Stratton Tools & Hardware -...

1 Answer

Getting spark but will not start


check to see if spark arrester in muffler is stopped up, my weed eater stopped running so i had to remove the screen in the muffler

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