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How to Identify and Resolve Common Issues ?

We offer a diverse range of insights on identifying and resolving common problems in sports. Our sources encompass academic articles, blog posts, and personal essays shared by seasoned athletes. :

All Yanmar valves are set at 0.006″ to 0.008″ intake and exhaust. Use a feeler gauge for that size. Tighten the locknut and re-check.
Valve Clearance Tips

Recommended valve-to-piston clearance is generally 0.080-inch minimum on the intake side and 0.100-inch minimum for the exhaust valve. The exhaust needs a little more clearance because it expands more with heat.

To adjust the valve clearance, slacken the locknut with a ring spanner and screw the ball in or out of the rocker a tiny amount, checking the clearance betwixt valve and rocker with feeler gauges. Once it`s correct, tighten the locknut and check again.
NOTE: With the engine cold, standard valve clearance is 0.011-0.012 in. (0.27-0.31mm) on intake and exhaust sides. Measure the valve clearance by turning the crankshaft clockwise until the No. 1 piston is at TDC.
Position the dial indicator on the top of the exhaust-valve retainer and zero the dial indicator. Next depress the exhaust valve. Note the distance traveled. Now subtract the difference in the gasket thicknesses and you should have an accurate measurement of the piston-to-valve clearance.
A valve adjustment (sometimes also called an overhead) is vital to the health of your diesel engine to ensure proper combustion. This is often an overlooked task for proper engine maintenance; however, neglecting your valves could lead to a lot of unwanted hassles like loss of power and decreased fuel efficiency.
The valve clearance of a diesel engine, which controls the intake and exhaust of the cylinder, usually exceeds the normal value due to wear or faulty adjustment. The increase or decrease of valve clearance will affect the performance and reliability of the entire equipment and cause unnecessary economy loss.
When sizing control valves, a general rule of thumb noted in many engineering publications is to size the valve such that it operates between 20 to 80% open at maximum required flow rate. It is also recommended to have the minimum opening no less than 20% to provide a safety margin at the minimum flow rate required.
This clearance is important because it compensates for the expansion of the various engine components as the engine heats up, thus allowing optimum engine performance and preventing engine damage.
It is a four-valve-per-cylinder engine, so with four cylinders it has 16 valves. The intake valves are slightly larger than the exhaust valves located on the opposite side of the combustion chamber because exhaust gas has pressure to push it out; intakes have only the atmosphere to push the charge into the cylinder.
Checking valve clearance includes the following: remove the valve cover or two valve covers on V-type engines. measure the space between the intake valves and exhaust valves, along with their lobes or rocker arms using thin feeler gauges.
Rule of nine

With any given valve open, count what number valve that is from the front. Subtract that number from nine. Whatever number you`re left with is the valve you`re in position to set. So, with number 1 rocker opening its valve, you`ll be setting clearance on (9 minus 1), number 8 valve.

With the plugs out turn the engine until any tappet goes fully down. Count the valves from the front of the engine to that valve, take that number from nine, then count to that number from the front of the engine again and adjust that valve.
The generally accepted piston-to-head clearance for steel connecting rod engines is 0.040-inch although there are many instances where builders have tightened this clearance to as little as 0.036-inch.
The “Rule of Thirteen” is used to know which valve to adjust on a 6 cylinder engine. If valve #1 is open (when the adjuster side of the rocker is up, and the spring side is down) then which valve do you adjust to get to a total of thirteen? The answer is valve #12.
Incorrect valve clearances will lead to poor running and, eventually, serious damage to your bike. You`ll find plenty of forum and Facebook posts from people claiming that they didn`t bother and their bikes are fine, but the damage will be progressive.
The maximum permissible leakage rate shall be 0.18 cubic inch (3 cubic centimeters) per minute per inch of nominal pipe size. The maximum permissible leakage rates shall be 1.5 standard cubic feet (0.042 cubic meter) of gas per hour per inch of nominal pipe size.
Excessive valve clearance is one of a most common defect in diesel engine which can lead to serious defects if not properly repair at early stage. When valve clearance is more, the valve will open late and close early. If the clearance of intake valve is high, it results in getting less air to combustion chamber.
The standard for our pneumatic pilots and level controllers is 30 PSI. The instrument air you supply to the regulator needs to be at least 60% of upstream pressure. For example, if you`re trying to hold 100 PSI, you need at least 60 PSI of supplied air.
A minimum flow aids the cooling of the bearings and the seals within the pump and reduces the potential for a continuous stop/start situation. The valve maintains a minimum flow through the pump, whilst also acting as a non- return check valve for the pump.
What is a Pressure Limiting Valve? A pressure limiting valve (PLV) is a valve that reduces the pressure of the water which flows through it. Water mains pressure can reach extreme pressures and without a pressure limiting valve the pipes in your house could reach this pressure too.
The valve will open sooner and close later. You may observe air leaks in the combustion chamber, leading to less available air for proper combustion. The power and performance of the engine will decrease. Fuel consumption of the engine will increase.
Commonly, each cylinder can use either two (one intake and one exhaust) or four valves (two intake and two exhaust).
More valves means better flow during intake and exhaust cycle, resulting in better combustion and thereby increasing the efficiency (better power and fuel efficiency).

Discover Relevant Questions and Answers for Your Specific Issue

the most relevant questions and answers related to your specific issue

LX 188. Engine suddenly dies. The fluel in the bowel of the fuel filter is empty. If I crank the engine the filter becomes dry and is collapsing some but the engine does not start. When I remove the supply line from the fuel pump to the carberator and crank the enginge there is a strong stream of gas being pumped out. I tap on the carberator ??? is the float is hung not allowing fuel to enter. Cranking the engine with the line off refills the bowel of the gas filter. Reattache line to the carberator===engine starts. Ran perfect for 20minutes then suddenly died. Repeated all the above and engine again started. What to do to fix this? Thanks
ANSWER : Debrie inside the needle and seat area which has to be cleaned out with carburetor cleaner and compressed air

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I have a 2004 60 hp yamaha 2 stroke outboard engine that doesn’t start or run well. Once warm and in the water it will idle in nuetral and also in gear. It accelerates in neutral but will die or lack power if I increase throttle while in gear. Engine will somtimes get to top speed but often while running at top speed engine will start to slow rapidly. Engine has full range of operationout when out of the water where there is no load on engine but is still difficult to cold start. Before these recent problems the engine sat up for several months and I had to change the impeller and spark plugs. Spark plugs fire, cylinders have proper pressure of 100, 100, and 110. I cleaned some fuel lines and filters and got new gas.
ANSWER : Every sympton you are describing here can be attributed to fuel starvation due to blocked jets and or water in carbs, when your engine dies does it die with dry plugs, or wet oily ones?

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Hello, i think i figured out what it was, after breaking down the valve again i was looking at the rubber that is around the valves and i was thinking at first this wasnt an extra part, but come to find out after many hours of researching online it is an peice that comes off but its just glued on, its a (Spider) gasket. So do u think if nothing is wrong with the valve itself that if the spider gasket is wearing away and starting to get britle that it will let the debris i vacuum up come back in the pool and let the backwash valve leak when its on the filter position? I cant thank u enough for helping me. You sure have lead me in the right direction and saved me alot of money. Otherwise i would of probably gave up and bought another one….thanks and let me know if u think that the buying a spider gasket will solve my problems
ANSWER : The spider gasket that you refer to is what seals the chambers from each other. Leaking here can have a large impact on how well the valve is able to do its job. But, I don’t remember seeing one in the parts diagram. If you are able to obtain one, then by all means, replace it if you can. As I said earlier, you are essentially rebuilding the valve assembly. If something looks worn, now is the time to repair / replace it during reassembly. I also have a suggestion for you as well. Take good pictures, document everything that you do when you disassemble and reassemble the valve. Then write up a tip (gotta become an expert) for others to read through and be able to service their own equipment. I was surprised to see that there were as many other questions asked about the same filter that you have. Highly recommend that you do this. As many times as you have taken this apart and put it back together, you are fast becoming an authority on it!Glad to see that you are sticking it through, and not throwing in the towel. After all is said and done, you will have a working knowledge of how your filter works, and be able to identify issues in the future before they become a problem. Congratulations!

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I need to replace a gas valve for a furnace its a york stellar 133,000 btus the old valve number is 36E36-304 but is discontinued i need the new valve that replaces the old one and the price the model of the furnace is P3UCD20N10601A AND THE SERIAL NUMBER IS EBBM032176,can you show me a picture of the valve to compair it with my old valve
ANSWER : You will probably have to go with a “generic” gas valve. Try contacting Grainger to see if they can cross reference a workable solution.

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Crosman Pumpmaster 760
ANSWER : Hi I had the same problem and I fixed it by just simply pumping the gun at a faster rate. For some reason when I pumped it slowly air would leak out and no pressure would build up similar to your problem, but when I started to pump it rapidly pressure would build up. Though this little fix works I might just exchange mine because I don’t think the gun should have this problem.

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I have a 7 position baquapure multivalve pool filter system
ANSWER : Http://www.waterwayplastics.com/manuals/810-0066.1108.pdf

This will give you the positions on the valve. It was a pain finding this… hope it helps. rex

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My engine revs on high by itself and runs rough
ANSWER : We had the same problem with our snowblower. we tried everything. ponits, adjustments. even converted points to electronics. we ened up putting on a brand new carborater and it runs great now. save youself the headaches and buy a new carborator. we spent $87. so much better

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