Question about Honda 8 HP Engine

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Air in crankcase

I have a honda 8hp ohv,it builds pressure in the crankcase fast. when the oil is opened even when off after running, it blows all the oil ot with alot of force!what could be causing this the engine has only had abot 15 tanks of gas throgh it.

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  • Honda Master
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Is the oil over full ??? then i would suspect a crankcase breather issue which should be in the valve cover... then I would be looking at a head gasket issue, rings or all of the above

Posted on Dec 28, 2013

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Posted on Jan 02, 2017

  • 1383 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

  • 234 Answers

SOURCE: the washer will run about 2 min. then die. i have

It is possible that the oil pressure switch is not functioning properly or you have a lighter oil in the machine than is recommended.

Post a comment if you need more assistance.

Posted on Apr 27, 2009

  • 10865 Answers

SOURCE: Honda 8HP GX240 willnot start after working fine.

Your carberator has crud, or rust, or glaze in it. The carberator will have to be removed, soaked in cleaner for three hours and then rebuilt using the proper carberator kit from any auto parts store. If you need to hire this done expect to pay about 35 dollars.

Posted on May 20, 2009

Editor925
  • 285 Answers

SOURCE: What gas and oil do I use on the Honda Excell 2600 pressure washr

That engine requires a separate gas and oil. There is an oil sump with oil level needle and cap on the side of the engine. This is where you fill it with special pressure washer pump oil available from any good outdoor store or place where pressure washers are sold. As for gas, Unleaded or Premium unleaded gas will work fine. Try not to use any fuel with ethanol blends however. Here is a list of oils that will give you an idea what to buy for the oil reservoir: http://www.amazon.com/gp/redirect.html?ie=UTF8&location=http%3A%2F%2Fwww.amazon.com%2Fs%3Fie%3DUTF8%26ref%255F%3Dnb%255Fss%255Fgw%26field-keywords%3Dpressure%2520washer%2520pump%2520oil%26url%3Dsearch-alias%253Daps&tag=onlinetoolrev-20&linkCode=ur2&camp=1789&creative=390957

Posted on Jun 15, 2009

  • 151 Answers

SOURCE: Pressure washer with Honda GX160 5.5 HP OHV-Starts easily but...

what about the linkage between the governer and the carb. Is that working and not binding?

Posted on Dec 24, 2009

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Mac2400 leaking air at oil breather hole


I have read both your questions and after taking both into consideration it sounds like it needs new piston rings. On a gas engine it is called blow by but both have a piston with rings on them, as they wear the end gap gets bigger and bigger allowing compressed air to bypass the rings into the crankcase where the oil is, the breather is there to allow air from the room to enter and exit as the piston goes up and down to avoid pressure or vacuum in the crankcase, the air on the top side of the piston is supposed to go into the tank but in your case some of it is going around the piston rings and into the crankcase building pressure and blowing oil out. There is not much inside a compressor like a gas engine, taking the head off and the oil pan should let you take off the connecting rod bolts and push the pistons out the top. This answer is based on the two comments of cant build all the air pressor and it is blowing oil out the crankcase breather. If you hit the 80 psi and unplug the compressor can you hear air coming from the limit switch box that the power cord goes into ? I will wait for your answer to continue.

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Depends on the cause.
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