the pump area is clear. the oil pump rotates.the line from the pump to the bar is clear. the hole to bar is clear my assumption is that the pump is defective!!!!!! thanks
“Chain Saw – 16” Bar, 3 Hp

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It can be defective. Or not right installed.

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But how does a chainsaw oil pump work? The crankshaft drives the pump, which draws oil from the tank and pushes it onto the guide bar via the outlet hole. The movement of the chain then distributes the oil along the entire length of the guide bar.
There is a Debris Obstruction in the Oiling System. Occasionally saw dust can get in the system and clog one of the various conduits the oil needs to flow through. This is one of the most common reasons for a bar and chain not getting oil, and it is fairly simple to fix.
Stop your vehicle if the oil pressure light turns on. Then check your oil pressure gauge. If the reading is low, then it causes oil pump failure. If the engine produces sound, it also is a signal of oil pump failure.
Oil pumps are usually either inside the oil pan and driven by a camshaft or outside the pan and driven by a crankshaft. When those engine parts start moving, the pump starts working at the same time to pump oil to reduce friction and wear between moving parts and prevent the engine from seizing.
The oil pressure generated in most engines should be about 10 psi per every 1000 revolutions per minute (rpm), peaking around 55-65 psi.
Naturally, the chain of your chainsaw will need to be oiled well to function perfectly. To make sure that it functions well, grab some WD-40 Multi-Use-Product. WD-40 works great for both – rust prevention and lubrication.
The most common reasons why your automatic oiler isn`t working are: Your chainsaw`s oil tank is empty. The chainsaw oiler is clogged. The oil pump is broken.
Lubrication of the chain and bar on your chainsaw plays a vital role in promoting longevity in the chain. All chainsaws have an oil tank which is designed to store special oil until it`s pumped through to the guide bar by the oil pump.
Vane pumps use a rotor with sliding vanes to pump the oil. As the rotor spins, the vanes create suction that pulls oil into the pump. The vanes then move outward, compressing and pushing the oil through the pump`s outlet.

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I have a 345 chainsaw. my oil pump will not supply oil to the bar.the oil case vent is clear. the oil case filter is clear. the oil passage to the pump area is clear. the oil pump rotates.the line from the pump to the bar is clear. the hole to bar is clear my assumption is that the pump is defective!!!!!! thanks
ANSWER : It can be defective. Or not right installed.

I have a husqvarna 137 chainsaw. The problem is with the bar oil. When the saw runs oil is flowing but where the rubber corner piece which allows the oil to flow out of appears to be just dripping the oil straight out. It looks like it should fill a small reservoir behind the metal plate and the oil then moves upwards where the chains drags the oil through the oil hole on the bar which is moving outwards as in the top chain on the bar. However the chain-brake area is just getting messy with oil splattering all over and the bar not actually getting oiled. I have fitted a new metal plate to see if the corner of the original was not sealing properly but that has not helped. The bar holes are clean. Any suggestions as I can’t see what it could be?
ANSWER : It’s the rubbers. I had the same problem with my 137 and 141. The rubbers shrink over time and the oil never makes it up the channel. The replacement part is one piece and less prone to leaking than the original 2 piece design.

Ms 170 leaks bar chain oil out bottom, no oil on chain
ANSWER : Your clutch drum bearing has gone bad, letting the clutch drum to move around and cut into the oiler behind it, so now it just pumps the oil out that hole. You have to get that fixed to use the saw, otherwise you’re going to cause catastrophic damage to the saw very soon.

On a huskvarna 345 the bar is not getting oil. i cleaned the oil holes on the bar.still,no oil.
ANSWER : Check out the oil tank filter, it is on the base of the oil take, it is a grey cover held with a single cross head screw, you ban get a screw driver between the fuel tank and the crankcase to remove it.

My chainsaw leaks oil out of a small hole or drain just below the base of the bar. is there anyway to way to stop this
ANSWER : Are you sure you aren’t talking about the chain oiler system? There is to be a small amount of oil to lubricate the bar and chain.

Oil is not lubing the chain on bar, what would be causing it?

When using the chainsaw, the chainsaw siezes, and makes the engine run sluggish. The bar and chain we not is not getting oil. The oil reservoir is fulled.

Hope this is not one of those ********, pay us first before we help us website situation.

ANSWER : Sounds like the ports on the bar are possibly clogged with debris or the oil lines going down to the bar are clogged. Check both of them to see if that might be the problem.

My bar isnt lubricating with oil and oil is coming out of the bottom of the saw. whats the problem?
ANSWER : Dry chainbar indicates the oil pipe from the pump/reservoir is blocked. Just needs a clean out. – Oil leaking from bottom after use indicates reservoir is continuing to syphon oil from pipe joints because oil pump is creating pressure in the tank because of blocked pipe. Simple cure is to crack open the oil cap each time you stop using the saw. This will release the tank pressure and stop the syphon effect.

Bar and chain oil leaks when not running
ANSWER : This is normal as the pump creates a pressure vacuum to pull the oil through it to the bar. If you are concerned about this, open and then close the oiler cap. This will relieve the pressure much like in a caulking gun or gen. purpose pump sprayer. Hope this helped.