black oily substance found in cone filter

[darren mac]

My 1992 175 evinrude engine fuel filter had some black gunk down in the point of the cone screen. I cleaned it out completely and replaced it only to find it again after the next trip to the lake. Could this be my fuel line deteriating or just too much oil in the gas.I was not mixing oil in my gas but too much oil had been added during break in period and some still may have been present although unlikely. I am replacing the fuel line from the tank to the engine but what about the smaller lines on the fuel system...VRO and such ? Should I install an inline filter or water seperator also ? And could that gunk in the cone filter have caused my carbs to starve out and blow my engine. The bottom two pistons on the starboard side bit the dust.

 

[james williams]

Re: black oily substance found in cone filter

I have an 89.Two years ago,I found my carbs.were FULL of black gum.I traced it down to the bulb.The inside was flaking off.I bought i new one,that took care of my problem...james

 

[james williams]

Re: black oily substance found in cone filter

QUOTE- And could that gunk in the cone filter have caused my carbs to starve out and blow my engine. The bottom two pistons on the starboard side bit the dust.``
I have a blown engine as we speak.My two are bottom port side.Pretty sure carbs.stopped is the culprit,,,james

 

[tashasdaddy]

Re: black oily substance found in cone filter

carb blockage could very well have cause the problem. change all the hoses to the alcohol resistant fuel lines, the ethanol eats away at the interior of the fuel lines. if you have a built in fuel tank, a fuel/water separator is a necessity.

 

[darren mac]

Re: black oily substance found in cone filter

I can remember once that my engine was not running too well and I had my fishing partner reach back and squeeze the bulb a few times. The motor perked up and ran better so I went and installed a new proper bulb hoping that my bulb was my problem. No better performance though. It is then that I checked my filter and found the gunk in it. I now feel that when my partner had pumped the bulb that actually the gas was being forced through the clog and temporarily gave better performance.