Question about Honda Horizontal Engine 8 HP OHV 2:1 Reduction 2-23/64 x 22mm GX240-RA2

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Gas in crankcase and oil

It looks like it might be coming in through the OHV breather tube

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The best solution I have found for this is to turn the gas shut off valve off when not in use. I have many of these Honda motors and on all of them if you don't close that valve after use, the crank case will fill with gas.

Posted on Oct 27, 2013

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Posted on Jan 02, 2017

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What should the compressin be on a briggs


What is the compression ratio for my engine?

Briggs & Stratton side valve (L-Head) engines use a compression ratio of 6 to 1.Our Overhead Valve (OHV) engines use a compression ratio of 8.5 to 1.

What would cause my engine to "puff" smoke while it runs?

White/blue smoking usually indicates the burning of oil. Causes to this condition include:
  • Overfilling the crankcase with oil
  • Incorrect oil grade
  • Operating engine at greater than a 15 degree angle
  • Inoperative crankcase breather
  • Crankcase air leak
  • Blown head gasket
  • Worn cylinder and/or rings
  • Turning/Tilting the engine on its side for any reason (storage, changing oil, etc). If the engine has to be tilted, ensure the spark plug is facing upwards to help prevent oil from escaping the crankcase.
Also, be aware that any small air leak can cause an excess of air entering the crankcase and will create a higher oil mist than the breather is capable of handling. The excess oil will then return through the breather tube and back to the air filter. Engine oil capacity is dependant on your specific engine model. To determine your engine's oil capacity, please visit our Oil Capacitypage. Oil level checking and changing intervals are available on ourMaintenance Schedule page, as well as a hyperlink (text highlighted in blue) leading to oil changing procedures.
The "Oil" section of your Operator's Manual also contains this information. Other possible causes include operating or tilting the unit at an angle, an obstruction in the breather tube (located behind the air filter), damage to the cylinder/piston rings, etc.

Jul 23, 2015 | Garden

1 Answer

Air in crankcase


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

Dec 28, 2013 | Honda 8 HP Engine

1 Answer

Engine started leaking oil near the back of the engine and collects on deak


Hi, You need to clean the engine thoroughly with some Purple Power or Fantastic and a garden hose. Then run the engine for a short time and locate exactly where the oil is coming from on the engine. One place to pay close attention to is directly under the cylinder where the crankcase mates with the oil sump. Some engines have gaskets fail directly under the cylinder because A; there are no bolts securing the oil sump to the crankcase in that location and B; it is an area of very high heat. I am assuming this is a push mower and does not have overhead valves? If it does have OHV, keep an eye around the bottom of the valve cover. Lastly, the crankcase breather cover gasket or the rubber tube the goes from the breather to the air filter housing may have come off or it may be cracked. But first things first, you must get the engine clean to determine where the oil is coming from. After establishing the location of the leak, post back with the info and I will provide direction to make the repair.Kevin,
Kevins Small Engine service,
South Berwick ME. 03908

May 09, 2013 | Toro Lawn Mower With Toro Power Tools

1 Answer

Gas and oil squirting into air box


First of all, there should be no gas/oil mixture on this bike. If it is a crankcase breather and it has gas coming out of it then it means that gas has ran into your engine and diluted the oil. Check the oil and if this is the case then drain and change immediately. As for the gas getting into the crankcase; if you have a float stuck in the open position in your carburetor the gas freely runs through it, then into the cylinder where it then leaks past the piston and into the case. I hope you engine isn't filled with gas but it sounds like it is. If this is what happened then the oil change will fix your problem. If so, take the carburetors apart and make sure the needles and seats are clean and move freely to prevent it from happening again.

Jun 08, 2012 | Motorcycles

1 Answer

Pulling oil into carb thru right breather tube,what is the cause


A blown head gasket on an OHV engine will pressurize the crankcase and blow oil out. Make sure that it was not overfilled with oil before tearing anything apart.

Sep 07, 2011 | Briggs & Stratton Garden

1 Answer

77 shovelhead w joe hunt mag and s&s oil pump everything is great except after about 20 mins of riding oil start coming out of gasket all around cam cover and mag assembly dont know what would cause...


There ae a number of things it could be. What it sounds like to me is that the oil is not being pumped back into the oil tank and is collecting in the cam chest. It should be blowing out of your crankcase breather tube as well if your crankcase breather tube is open. Behind the oil pump, there are three holes. One is behind and above the oil pump. This is where the breather tube from your oil tank and the primary comes into the engine. The hole directly behind the oil pump in the middle is the oil return line from the very back end of the primary where the oil from the primary is recirculated back into the engine. The bottom hole behind the oil pump is the crankcase breather. It should have a hose that runs back around behind the transmission and just dead ends in a bracket pointed towards the final drive chain. This hose should be open to vent the crankcase pressure. Have you checked to see if oil is being pumped back into the oil tank? If not, the scavenge gears of the oil pump may not be pumping the oil out of the engine and back to the tank. If this is the problem, you may not have the drive key properly installed in the scavenge gears of the oil pump. Still, oil should be pouring out of the crankcase breather hole. But, this is what it sounds like it's doing to me. The oil is building up in the cam chest for some reason.

Good Luck
steve

Sep 06, 2011 | Harley Davidson FXDWGI Dyna Wide Glide...

1 Answer

Briggs & Stratton Vertical OHV Engine 18 hp blowing white smoke engine run great but a lot of smoke and also have oil being spit out of the black hose that come from engine to the carb.


Check your oil.

If it is overfilled, milky, or smells like gas. Your going to need to change that ASAP. It sounds like the float has stuck in the past or is still sticking, and it has flooded the crankcase with gas, which has mixed with the oil. And because it is overfilled it comes through the breather hose into the carb. This also explains the smoke most probably because the oil is spewing in the carb through the breather and being burned.

Jul 05, 2011 | Briggs & Stratton Briggs Stratton Intek V...

1 Answer

89 Harley FLTCU oil coming from the crankcase breather tube and


This is an age old problem for the Harley engine. In you 89 model, the crankcase breaths from behind the oil pump through a tube that runs to the backside of the air filter assembly. Most people that I know, simply remove the tube coming up to the air filter and block the hole in the air filter assembly backing plate. At the breather, they run a short hose to just behind the transmission and cut it off there. This is similar to the earlier Shovelhead engine and the way it breathes. In 1994, Harley went to the "head breather system" which was better but it still gets oil into the air filter assembly.

There is one thing I saw on the aftermarket assessories market once called a "CatchCan". The breather tube ran to it and it seperated the oil from the air and the held it in a small container to be emptied on a regular basis. I have never used one nor have I ever seen one so all I can tell you is what the book said. Matter of fact, I cannot remember where I saw it now. Custom Chorme catalog, maybe. Good Luck, Steve

Apr 30, 2010 | 2000 Harley Davidson FLHTCUI Electra Glide...

1 Answer

Oil in air breather


sounds like you have too much oil in the engine (should normally be around 500-600ml when there is too much oil, it gets past the piston rings and pushes it through to the head.

May 20, 2009 | Briggs & Stratton Briggs Stratton Vanguard...

1 Answer

Fuel leak


Wait... fuel is pouring out of the crankcase breather? Are you sure it's not the carb overflow tube? The crankcase breather should be going back into your airbox or through some kind of filter. If gas is coming out of there DO NOT START YOUR BIKE. It means that gas has gone from the tank through the carbs into the cylinder and is now in your oil. Thinned out oil is the devil for bikes. Sounds like you'll need to clean the carbs and set the float bowl height and maybe rebuild the petcock. Check to see if any fuel is coming out when the petcock is turned off. If it only has on pri and reserve then check for gas in the vaccum tube.,,

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