I am working on a 75 40hp evinrude. I took the carb off and gave it a good cleaning, but didn't install a kit because the marina that told me they had one didn't, but the mechanic looked it over and said just to put it back together try it. Well I tried it and it is getting flooded really bad. It will run for a few seconds and then it dies and gas comes pouring out of the front of the carb. I did notice when I was putting it back together that the needle valve wouldn't always come down when the float would. About half of the time it would. Would that be causing this problem? Also, there are two holes in the back of the motor that are fairly close together, are these for water of exhaust or both. For the few seconds I had it running, there was no water coming out of these holes, but I didn't know if that was just for exhaust.
The needle has to work 100% of the time not 50 not 75 ...100% and the reason is that the needle allows the gas to enter the bowl when gas level is low or stop the flow when is full.
It looks like your needle does not stop the gas to overflow the bowl hence the flooded engine.
Also I don t know your carburator my 40hp is 1960 but the main jet has a smal rubber gasket where it mates with the carburator bowl, alot of people mistakes that gasket with gunk and they remove it.....the side efect is flooded engine and or running very rich no matter the jet setting.
There has to be a carburator kit , if they have one for my 1960 motor for sure there is one for yours.....ok i took a look here is your carburator rebuild kit....http://www.iboats.com/mall/partfinde...****=123670030
Copy and paste in your browser it will take you to the page where you can order to.
Your thinking is correct. But what you don't know is if the neddle is stuck in the up position, is it really closed or just stuck in crap preventing it from moving open or closed. I would suspect the problem being there. There should be a little tang that pulls the needle open when the float falls. As far as the holes you are refering to, after just a few seconds the thermostat would not even be open. Those holes a re the holes for exhaust and water to escape if there is insufficent draw out the prop (or back pressure preventing the exhaust escaping). Normally there would be very little water or exhaust coming from those holes.
On this particular carb there is nothing physically linking the needle valve to the float, it simply falls from gravity as the float falls. And I am positive there is no gunk in there as I just got done cleaning it. I will just get a kit for it and try that out. As for the pee hole thing, I didnt know if this motor had a thermostat or not. So how much water should come out normally and how long should it take to get the engine hot enought to activate the thermostat?
OK, the early float valves had metal needles. Then they went to soft tip needles, but being soft they would stick up in the seat. So now they put a little spring clip on the needle to drag it off the seat when the float drops. I don't know which one you have (except it isn't the one with the clip). Don't matter, it isnt sealing when it is closed. Get a kit and do it right.
Now, about that thermostat. There should always be some water sparaying out the holes in the back, whether the thermostat is open or closed. Takes maybe 5 seconds to fill the system, then there should be a spray. The amount of spray may vary according to conditions, but there should never be none at all.
Are you running it on a boat, in a bucket, or muffs or what?
Everything works great! Runs great and also started spitting water after about 10 seconds. The only problem is that the water it spits out is really hot to the touch. I mean it is like hot dish water. I felt the block and it is also hot. I could hold my hand on it for 3-4 seconds but I only had the motor running for about 30 seconds which makes me think that it is just going to get hotter after time, so I shut her down and came straight to the experts. Did I just not let it run long enough? Could the thermostat be bad? I don't even know where the thermostat is. Just because there is water coming out the back of the motor doesnt mean that it is actually passing through the block, right?
75 evinrude carb and pee hole question
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