73 evinrude 18hp fuel issue

[kimcrwbr1]

The small square one would probably work just fine but that is the 22 cubic inch displacement and they drink alot of fuel at WOT. Get one of those arrow shaped pumps and you will never have to worry about a too lean condition at WOT. Make sure it is a two port pump and only has two nipples.

 

[kimcrwbr1]

You can gain a few ponies by just putting a 25hp carb on it everything else is the same.

 

[timguy]

If you go to the larger carb you may need the bigger pump. The 2 hose pumps get the pulses directly from the hole in the case/block. The 3 line pumps can be mounted elsewhere and plumbed into the pulse port on the crankcase/block. I have about 30 used pumps here. I test them and sell for 15 bucks exchange.