Two different motors same issue

[Jwhitchard]

I have a 96 nitro that had a 94 mariner 225 on it that ran like it had fuel issues. I took that motor off and put a 200 black max on it and it’s doing the same exact thing. Runs like it is starving for fuel. When I take the cowling off the carbs have a milky looking liquid right in the front of the butterflies but not like horrible. I’ve checked the fuel/water separator every time and it doesn’t appear to have water in it. Any help would be greatly appreciated. T. I. A.

 

[Scott Danforth]

The fuel tank, fuel, pickup, anti siphon valve, and plumbing is on the boat side. I would look there. Specifically st the fuel quality

 

[Jwhitchard]

The fuel tank, fuel, pickup, anti siphon valve, and plumbing is on the boat side. I would look there. Specifically st the fuel quality

Fixing to go home and go through it all again

 

[Scott Danforth]

The milky looking fluid is most likely water

 

[racerone]

???----We have all heard of carburetor icing have we not ?-----When a liquid vaporizes it seeks / needs heat.----Refrigeration principle from long ago.-----So the carburetor cools down and moisture from the air condenses in the carburetor.-----Shows as a white milky fluid !!

 

[Scott Danforth]

if it is carb icing, it would need to be a foggy day between 20F and 40F. Above 40 is too warm and below 20F, you end up with ice fog and not fog vapor

 

[racerone]

??----Carburetors cool down and moisture condenses in them.

 

[dingbat]

??----Carburetors cool down and moisture condenses in them.

Venturi effect

 

[jimmbo]

Will happen any place where the Humidity is High. I have seen Frost on the outside of Carburetor Throats from that same cooling effect, and have experienced icing in a few of my old cars on cold(between 0c and 6c) rainy days. Run like crap at idle until there is enough heat seeping up through the Engine to warm the Carb. Heated Air Cleaners were good at solving that problem