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?

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  • sway34 Feb 22, 2009

    Its a honda gx340. thanx

  • sway34 Feb 22, 2009

    its a honda gx340

  • sway34 Feb 22, 2009

    thankyou jerr. I'll try this and update with the result. cheers.

  • Anonymous Feb 23, 2009

    I havent had time yet jerr to work on the power washer with the kids and all. I'd rather give you a blue rating if it works rather than just the green one. It'll be a day or so before I can get down there to try your fix. I will rate it for sure.

  • sway34 Mar 07, 2009

    sorry for the delay jerr. just applied your fix today. It runs like brand new again. awesome. thankyou. cheers.

  • JERRY ABELL
    JERRY ABELL May 11, 2010

    hello mr s what kind of engine do you have.

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5 Suggested Answers

  • 1378 Answers

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

txkjun
  • 409 Answers

SOURCE: Honda Misses.

Pin point the dead hole and check that injector.

Posted on Dec 24, 2008

  • 10865 Answers

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

  • 6 Answers

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

sisadsl
  • 1508 Answers

SOURCE: trying to fix 82 xr250

if the diaphram is in poor condition as you say, it will need a new one.
if there is an air leak though the diaphram it can cause the symptoms you describe

Posted on Aug 10, 2010

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