Fuel delivery

[johnstonjohnr]

Hello all. I wanted to introduce myself and say hello and ask a question. I just purchased a 1987 BayLiner with a Force 85hp outboard. Been working through a few issues but nothing major...so far. Boat has been sitting for 12+ years. Came right to life after a little PM. My biggest issue seems to be fuel delivery. Had to replace fuel pump diaphragm as mine was cracked. Replaced all fuel lines and clamps with screw type clamps. Will be testing this weekend. Anyway my question is, it seems like a lot of people talk about the top carb seems to starve for fuel at times and I was wondering if it would be possible or make sense to swap the top and bottom carb fuel line fittings and feed the fuel from the top carb down instead of pushing the fuel from the bottom up. Just wondering if this would work or make a difference. This is all new to me so I am just learning as I go and go so I can learn.

 

[foodfisher]

Re: Fuel delivery

No, if this was better the engineers would have designed it that way. There is a post called "awakening a sleeping motor". Search it. I found it very useful and anything additional can be asked specifically. Good Luck.

 

[Frank Acampora]

Re: Fuel delivery



Feed position really doesn't make a difference. The fuel pump can supply way more than all three carbs together need. Remember, the hole in the carb inlet needle seat is less than 1/16 inch diameter.

Here's how I feed my twin carb 140---but only because it is easier to place that fuel filter there.

AND: While this engine has stainless screw clamps, I have begun using black electrical zip ties to secure fuel lines. Cheap, easy, they never rust (if you don't get all stainless clamps) and just cut 'em off with a dykes pliers when you need to change. Additionally, you can not get them too tight and cut into the rubber like screw clamps will.