Why there is 2 stroke oil running out of an outboard foot propeller prop area
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- Опубліковано 6 жов 2024
- video is based on some of the reasons that you would have oil running out of the outboard foot. most of the time it's simple stupid stuff that causes the problem.
Working thru this same issue with my 65 Johnson FD-19. This is the best resource I’ve found. I built the fuel line assembly and it’s my first time so that might be it
Thank you so much for the video! I just got a 1987 Johnson 150 and I'm beginning to restore her. When I first got her she had her running issues but while running would be your stereotypical thin little blue smoke that would dissipate you wouldn't even see it in the atmosphere unless you started it up to go to a new fishing spot. Over time I noticed especially if I was going slower even after replacing the spark plugs I started to get more smoke and then one day I walked out to see all this black sludge all over my transom saver (which i believe the gasket from the power head to mid unit is going) And then also a small leak of it around the bottom of the exhaust manifold cover on the back of the power head. I ended up cleaning everything up and then another day I took it out and while going slow it went from the light blue to either a darker blue or kind of a white and it would be a little bit more than normal and it would kind of hover around. No overheating alarms or anything. The VRO has been removed and I run the oil and gas mixture straight into the tank and I use one of those cheater cups at the 50 to 1 ratio. I did notice that on the bottom carb I am getting some fuel poolage and I think it's coming from the plastic 90° feeder line that's on the bottom and or I just noticed today that the port fuel pump is leaking around the back screw which is causing fuel to drip down that same elbow piece that you were talking about so this video brought to light a few things that it could be. If I'm leaking fuel then I'm sure I'm sucking air in. I'm also going to take out the thermostats today just to test them but I'm never got any overheating alarms
Thanks for taking the time to make this video, this describes my issue perfectly, hoping that a new fuel line will fix my issue.
Thank you so much for the information about the gas line. It solved my problem.
Wow, this was exactly what i was dealing with and I had no Idea. Great video.
I’m in the same boat. Did the new lines fix your problem?
Thanks, I know have some good information on where to begin troubleshooting.
My 140 mercruiser just started doing this after I changed the oil and filter. Was running fine until I punched the throttle, then it started smoking like crazy along with some oil it pushed out like you were talking about.
Really great information thanks for your video.
I have an air leak but darned if I can find it. I replace all the hoses from the tank up to the engine, re-taped the nipple coming out of the tank, replaced the primer bulb, and even tried bypassing the fuel connector going into the engine, and no luck. The engine runs good at speed, and will idle nicely for a few minutes but you can watch at idle as the fuel filter fills up with air, eventually starving the carburetors of fuel so it stalls. If I prime it with the bulb all the air squeezes out (I assume going though the carburetors) and it fires right back up, only to repeat the process. I even tried putting an electric pump near the fuel tank hoping that if I pressurize the system I can see where the gas is leaking out and find my problem, but no gas seems to leak out anywhere! Although the problem goes away when the electric fuel pump is running, no air in the system and the engine will idle indefinitely. But seemingly no gas leaking anywhere either.
There is a semi-transparent tee where the oil pump delivers oil to the fuel before the fuel pump, and I can also see bubbles there (when the electric pump is not running or all the time before I installed it), so I know the leak is either at or before that tee. I also replaced the lines running from the oil pump to the tee, but did not replace the check valve.
I've also replaced the fuel pump and the pulse hose. That made no difference.
I think I can rule out the problem being at the tank because the electric pump does not seem to draw in any air. When it is running there is no air entering the system.
Any ideas? I'm kind of running out of things to replace.
As a second issue, does anyone know whether that electric fuel pump will cause the oil injection system to stop working due to the outlet of the oil pump being at pressure rather than suction? For now I've mixed oil in the tank just in case but holy heck does it smoke now, so I assume the oil pump is still working, but I don't know how to tell other than running it like that for a while and seeing if the oil usage from the oil reservoir is appropriate for the amount of fuel used. But ultimately I need to find the leak so I can remove the electric pump.
Do you have an anti syphon valve on your pick up tube on the gas tank ? If you don't know ? it will inside the fitteing between the gas line and pickup tube . If it is bad it will flutter inside the valve with a basket ball effect not letting fuel to go by the ball and out of the valve . At slow speeds it will work fine , but give it more gas and it will flutter stopping the fuel . I have also seen the valve have a crack in them and do the same thing .
This will also set off a low fuel alarm on some of the johnsons . Good luck and give a shout back if you find something. Most older boats have the anti siphon valve on them that was a coast guard rule for boat builders for years .
@@sanitymaintenance573 There was nothing between the pickup tube and the engine save a two sided nipple (brass) where it passes through the side of the engine bay and the primer bulb, which lies in the engine bay. Also, the problem is the opposite, the engine runs fine at speed (there is still air bubbles but they don't build up in the fuel filter, they seem to pass through the carburetors allowing fuel to build up sufficient to run). Instead the air buildup occurs mostly at idle.
I temporarily have an electric pump installed right after the pickup tube to search (unsuccessfully so far) for the leak, but it doesn't seem to affect anything when it is turned off. It does act as a check valve though, not allowing fuel to flow backwards. I am not sure what the pressure loss is across the electric pump but it can't be much, I can blow through it. So far it seems to have little to no effect on operation when it is not running. Maybe the air leaks in a little faster, but I haven't put a stopwatch to it.
I really thought the electric pump was going to be the way to find the leak because if air is leaking in under suction gas should leak out under pressure, but so far no. It seemed like a good idea though. Thankfully it was less than $20.
I think next I am going to replace the tee where the oil injector feeds into the gas line. It is plastic. Maybe it has a crack or something that I cannot see. I'll use a brass one. If that doesn't work I'll remove the gas "plug" connection to the engine, I don't know why it even has one this motor weighs 400 lbs and does not come off the boat without a hoist. Plus the wiring harness and all. Maybe it's there so you can carry an extra tank or something, but I never do, I don't even have one nor felt the need for one.
As a side note, one thing I might do if I can get the leak resolved and the engine does run fine with the electric pump installed (but not turned on) is fit it with an intermittent push button (one that does not stay on unless you are pushing it). It's great for priming the engine! Way better than having to go to the back of the boat and squeeze the primer bulb. But that isn't nearly as important as finding this damn leak. My original plan was to remove the electric pump once the leak was resolved. They say they aren't safe because they keep running even if the engine quits, say in an accident or something. But I think if I had an intermittent button and used it only for priming that wouldn't be a concern. But the damn leak....
@@sanitymaintenance573 Could the anti siphon valve be in the tank? I am reluctant to try and remove the pickup tube because it's in there pretty good and I don't want to damage the tank (it is plastic or fiberglass). Also the temporary electric pump (located immediately after the tank) does not draw air. When the electric pump is running no air accumulates in the filter (which is my observation point since it is semi-transparent and I can see the bubbles in it).
The engine is a Mercury V-135, if that helps. There is no low fuel alarm that I know of, but it does have a fuel gauge on the dash, which works fine. Tank is nearly full right now.
@@Nonplused I posted a video just for you .
I bought a engine 1991 40 horsepower Evinrude outboard engine with the VRO2 and it's leaking oil right out of the rear of the propeller and now I'm trying to figure out the issue this video may help me The problem is again like I said it's hasn't been hooked up to anything I just recently hooked up the VRO tank to the engine and notice this oil dripping down from the rear of the outboard propeller.
ok i had the oil out the foot for the last 3years and now down the side of the motor-i found i had low compression in the middle cylinder-evinrude 75hp 1984-den i found water in the middle cylinder-took off head and found i had a cracked gasket-the motel around the cylinder opening-i think the was was washing the gas/oil mox into the exhaust as it wasnt gettin fully burned-ill ck back in a few weeks after i get it fixed and tell yall if it stopped the leaking oil problem
Ive had several two stroked they all leaked oil down prop eventually. Never a issue. Mechanic said it's normal
black color?
I have oil coming out my foot on my 99 Suzuki df70 4 stroke,, I’m getting ready to pull the head and clean out oil pan and replace oil pump and gaskets etc,,but maybe you can give insight about oil coming out in the water at the prop,,motor has good compression
This is happening to my 98 evinrude ficht 150 I haven’t found the issue yet and have changed fuel lines like crazy
Fuel pump has 3 fuel in fuel out and vacuum my question is what or where will vacuum go look like ? thanks
Would an air leak cause engine to sputter a bet as well?
What if it’s leaking from your housing unit whenever the trim is all the way up?
Hi! Everyone. I having big time oil coming out of the Exhaust and the small hole on the lower unit. I am about to shoot it. Lol. Oil runs out even when its not running. Comes out very black and thicker. I replaced the oil injector tank old one had a crack in it. And replaced all the lines. There holding pressure and not leaking. Someone said and I thought there's a small crack in the block. I can make it run by working the choke. Untill to much oil on the plugs. Then stops. Going to check the sparkplugs and Compression. Would one cylinder give me this problem. I had air in the new oil line but got the out took a few times. Its has not bin used in 3 years. The tank got a leak in it when stored Way.Any ideas??? Thanks in advance.
This is my email address. catchinkings@gmail.com. Sende a few picks of where the gas and oil line hooks up to the engine.
Are vro pumps worth it? I’am thinking of doing away with mine
Honestly I like them . I have another video on them on this channel. Beer talk on vro
If you don't know the vro it will scare you. The other video will help you understand
Is this the same for 2 and 4 cycle?
I see now 2.
Primer bulb should be near the tank not near the outboard
Can anyone help
Check your pickup and fittings going into your gas tank as well
Check your gas filter as well . I've seen bad gaskets do the same thing. If all else fales add pressure to the gas line and you will find the leak fast.
So how and where to get that hose from?