Question about Poulan Pro PR550N21RH 21Inch 190cc Briggs Stratton 625 Series Gas Powered Side DischargeMulchBag Lawn Mower (NonCARB Compliant) ()

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Engine is not running as fast and as loud as it was before? Air filter good and Oil is good could it be a spark plug?

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If the motor is running, it has nothing to do with the spark plug. Those small engines have a rev limiter the gives the engine more power when under strain and then reduces the power when not under strain. This is a simple fix. Look near the carburator. You will see some rods with springs and one of those rods goes in toward the engine. More than likely, you have an over stretched spring. If you can do it, (***SAFELY***), start the motor and give a gentle tug on that rod. The engine will REV UP! This will solidify my point that the spring is wore out. Easy and cheap fix. Just be aware of the spinning blades under the deck, unless you have a blade disengage feature but I am not aware if the Poulan has that option on the handle bar.

Posted on May 14, 2010

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Stihl br350 backpack blower will only spark when pulled fast. It will not start pulled fast or slow!

To start a small two stroke engine the rope needs to pulled rapidly. So from what you are saying I believe that your problem may not be in the ignition system. An engine needs three things to start and run- air, fuel and spark. Make sure that it is getting enough air by checking the filter and make sure if its a foam element that no foam has torn from the element and been sucked into the engine. Clean or replace a dirty element. Check the fuel filter and make sure that fuel can flow freely through it. Even a tiny amount of dirt can clog a filter enough to hinder flow to the carburetor. Replace the filter if it's dirty or over a season old. Clean the carburetor THOROUGHLY! Use a good quality carb cleaning spray and make sure the diaphragm isn't hardened or creased. Replace any part that's questionable. A way to test start the engine is to put a few drops of pure gasoline in the spark plug hole and quickly replace the plug and pull the cord to start it. If it starts for a moment the ignition system is good. Don't do this more than a few times cause a two stroke engine requires oil in the fuel to lubricate the rotating assembly and running straight fuel for more than a few seconds can damage the engine. Do not use starting fluid it damages two stroke engines.

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22' snapper walk behind mowewont start .cleaned spark plug and still wont start .swapped spark plugs from another mower that does work and the other mower starts with the snapper mower's spark plug .

You need several things for a running internal combustion engine:
  • Air
  • Spark (to start)
  • Fuel
  • Compression
  • Lubrication
  • Exhaust.
You've shown that you have a workable spark plug so far. Going from the above, consider as well
  • Fuel. Bad / old / contaminated fuel. Clogged fuel filter. If it's a motor that needs gas/oil mix, does your gas have the right oil mix?
  • Air: Dirty, clogged air filter or air inlet.
  • Spark. Is any electricity making it to that proven-workable spark plug?
  • Compression. For this one, the most likely problem (other than a toss-the-engine thing like a broken piston) would be if the spark plug is not tightened into the mount hole, allowing the air to leak out rather than compress.
  • Exhaust. Most lawn mowers will have a spark arrestor on the exhaust to make sure you don't set a dry yard on fire with your exhaust. It's often overlooked in diagnosing two-stroke engines. Make sure it's not clogged or blocked.
  • Lubrication. Is there oil of the right type, and up to a proper level on the dipstick. No oil equals way too much friction in the engine.
Good Luck!


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1 Answer

Engine turns over about 3/4 of turn,won"t start,been running good,new batt,new plugs,new air filter

check and see if you have gas in the oil if you do rebuild carb if not replace starter is bad

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1 Answer

What parts do i needed for a tune up on a kia 2004 saoda

write down the manufacture date the vin number engine type and capacity eg1.5,1.8,2.0 armed with this info head down to your parts shop you will need. oil correct grade for your car 5litres will be more than enough or just right for 4 cyl. oil filter spark plugs some cars use irridium or platinum with some cars these do have standard equivilant that are cheeper fuel filter air filter a can of throttle body cleaner to clean the throttle body jack up the car sit it on stands never trust a jack remove the drain plug from the sump drain the oil into suitable dish or container and dispose of it responsibly replace the sump plug and tighten it firm locate and remove oil filter fit new filter spin it on then tighten by hand half a turn locate and change fuel filter dont forget to inspect filters for leaks when service is finished add new oil to correct level start engine run til oil light has gone out swich off recheck oil level remove spark plug leads mark them or do one at atime change spark plug put leads back on open air box remove old filter loosen clamp on air intake where it fits on to engine at throttle body move out of the way hold butterfly open and spray with cleaner to remove built up deposits a small bottle brush is good to get inside refit the air intake pipe and filter the cleaner will make the engine run a bit rough you may have to wind it a bit to start it it will clear itself after running for a short time be shaw to refit any plugs or connectors and pipes

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2002 pontiac sun fire engine cuts out at 2000 RPM and stops when you accelerate no service engine light what could be the problem

Possibly a tune up including spark plugs, fuel filter, pcv valve, air filter, and an oil change. Do include the spark plug wires if it has them.
If all of that is fine, see if the spark plugs are covered in oil... that will also cause it to run bad but not necessarily throw the check engine light.
Good luck

Mar 27, 2011 | Chevrolet HHR Cars & Trucks

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What does a major tune up for a 2004 chevy impala consist of? What should be done and needs to be done?

New spark plugs, oil and oil filter, transmission flush and fill, fuel filter, air filter, coolant flush and fill, clean throttle body plate and bore, clean the MAF sensor, replace any loose or cracked vacuum lines, PCV valve, new air filter, new battery.

99% of the time all you should ever need for a tune up is new spark plugs, and a clean air filter and throttle body. But since your inquiry indicated "major" I gave it more critical thought.

Feb 18, 2011 | Chevrolet Impala Cars & Trucks

1 Answer


I would first get a tune up on It. You know change the spark plugs, spark plug wires, oil, oil filter,air filter and also change the fuel filter and see if that helps.

Dec 03, 2010 | 1997 Chevrolet Lumina

1 Answer

Engine runs rough, burns tons of oil, and keps shutting down

Could be too much oil. Check oil livel and make sure that the oil is not too thin (gasoline in oil). Install new spark plug, add premium fuel in tank and start engine without the air filter (air filter could be dirty or soaked in oil). Run for a while to see if condition improves (no or less smoking). Replace air filter while the engine is running to see if it makes a difference in performance. If installing air filter had no effect, and engine continues to smoke most likely valve guides or rings are faulty. Hopefully it will clear up. Good luck

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1 Answer

The engine turns over but will not start

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