Question about Honda Maxus Prosumer MX5223 Pressure Washer

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Pressure washer problem

Honda gx340. pump appears to be working fine. motor starts ok and runs at low speed ok. mid rpms it starts to miss here and there. high rpm it starts to miss frequently. after 5-10 mins. at high speed it releases the occasional pop with a flame which disappears instantly. does this about every 20 seconds or so. if I turn down to low speed the engine smooths out somewhat and stops backfiring. it still has substantial cleaning power at low rpm. took the head off, checked valves, seals, piston etc. all appeared to be in great shape. cleaned spark arrestor. spark is strong at plug. checked kill switch, ran with coilwire to killswitch disconnected and engine would start to miss if I pulled gently on coilwire. took cover off to check for grounding out but wire was in perfect condition right back to the coil. coil was fastened securely. put it all back together and it ran exactly the same as before I started troubleshooting. oh ya...little faint puffs of black smoke accompany the misses at high speed. it smells like its running rich. Im not knowledgable with carbs which is why I havent opened that yet. suggestions? MY HONDA GX340 MOTOR ONLY RUNS WHEN CARB IS PRIMED AND THEN SHUTS DOWN AFTER ABOUT 10 SECONDS

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  • Samuel Charles Spriggs May 11, 2010

    Before taking the carburetor apart, I'd adjust the air/fuel mixture. There's a screw with a spring at its base on the side of the carburetor -- turn this back and forth until the engine runs smoothly.





    And what's this?: "MY HONDA GX340 MOTOR ONLY RUNS WHEN CARB IS PRIMED AND THEN SHUTS DOWN AFTER ABOUT 10 SECONDS"

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6 Suggested Answers

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SOURCE: pressure washer stalls

Pressure washers work under very dirty conditions, no wonder they encounter engine problems. Here are a few pointers from a former pressure pump tech. The unloader is a source of engine overloading however this can easily be checked with a pressure guage attached to the gun with a tee fitting having the guage and the normal tip used for the unit. The pressure should never rise over rated pressure. The pressure should drop considrably when trigger is released. The life of the pump and engine can be increased by setting max pressure to 75% of rating. Most engine problems are from following conditions:
Leaking or misadjusted valves; clogged muffer /spark arrester; weak spark coil that is about to fail completely; kill switch/oil sensor wiring and or sensor mal function; gas cap not venting properly causing vacuum in tank and wet or dirty air filter.
All these problems easy to check, fastest repair is to disconnect oil sensor wire to check oil safety system. Then temp replace coil with known good coil. Loosen muffer bolts to check for clogged muffler. Temp run engine without gas cap to check for vacuum. Finally if everything fails, run the engine with carb cleaner spraying directly into the intake. If the engine continues to run with carb cleaner then the problem is fuel delivey and faulty carb. enjoy

Posted on Dec 01, 2008

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txkjun
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SOURCE: Honda Misses.

Pin point the dead hole and check that injector.

Posted on Dec 24, 2008

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SOURCE: honda powered gx160 model pressure washer wont start

Buy a new plug, drain out all of the old gas and put in new gas, and take a look at the air cleaner. If the air cleaner is dirty replace it. There you now have a good spark, good fuel and good air. The engine should start. If it doesn't get some carberator cleaner spray and some starting fluid spray.

Posted on Apr 12, 2009

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SOURCE: honda cbr 600 wont start

hi, each lead has the specific number on it. if you do this correctly then they genrally give you an idea to where the sit in the coils( the way they bend :-) ) also i believe the coils are better off been attached to the frame once you are sure leads are in corect order and possitioned correctly in the coils.i just presumed the coils neaded earthing. make sure battery is pleny charged as a bad battery can just hinder. it is also very easy to flood the bike so just check the plugs again. if they are unusually wet then dry them off and try again . otherwise maybe try cleaning all electics.

hope this somehow helped
gavin barraclough

Posted on Apr 26, 2009

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SOURCE: Honda Pressure Washer HP 5 not starting

You can try spraying some carburetor cleaner into the carb. If it starts for a minute, your carburetor need cleaning. When you added new gas did you remove the old gas first? Is the air filter clean?

Posted on Jul 19, 2009

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My Honda gx340 is revving high all the time Can some one tell me y thank you


should be an internal govenor on a plant unit like that

...
there is a thicker than normal metal rod running off the carby to the motor and that is where you adjust the govenor

cant find good instruction how that governor is adjusted ..if adjusted the wrong way it will rev out may even throw a piston

then check carby idle adjustment
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you tube
11hp Honda GX340 cold start
https://www.youtube.com/watch?v=i3_v68__X5o




Honda GX340 HGI Partsf21c43c2-def4-46c5-9224-ed46701c0c01.jpghonda-gx340-revving-high-all-time-some-qkhmqzcwln4tohiil4ndbnz4-2-2.jpg

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Sincerely,
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Landa Northwest
www.landanw.com

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