SoCal Jet Boats

Tech Talk => Engine Mechanical / Electrical => Topic started by: JordanDangerfield on April 30, 2018, 10:34:00 AM

Title: Fuel Pumps, Filters, and Water Separators
Post by: JordanDangerfield on April 30, 2018, 10:34:00 AM

I’m curious to see how everyone is setting up the fuel system on their carbureted motors. Who uses a fuel water separator? Are any filters used after the fuel water sep? What kind of fuel pumps are being used in the 600-700 HP range?

Title: Re: Fuel Pumps, Filters, and Water Separators
Post by: rivrrts429 on April 30, 2018, 12:42:00 PM

I use a fuel/water separator with no other inline filters along with a Clay Smith mechanical fuel pump.

Title: Re: Fuel Pumps, Filters, and Water Separators
Post by: Kirkcircus on May 24, 2018, 04:39:42 AM

I just picked up my 1st jet boat two days ago, so no answers from me, but lots of questions!!!
It came with an electric fuel pump but I think I want to get away from that and just get a priming bulb and use the mechanical pump on the motor. What is the benefit of the electric pump besides initial fuel on start up after sitting? Stock Buick 430 motor so not a high performance motor that might need extra fuel volume. I'm wondering if it is just the thing people do to make life easier or if there is a general knowledge everyone does that because it's better.
Thanks for any input.

Title: Re: Fuel Pumps, Filters, and Water Separators
Post by: JordanDangerfield on May 24, 2018, 08:28:23 AM

Quote from: Kirkcircus on May 24, 2018, 04:39:42 AM

I just picked up my 1st jet boat two days ago, so no answers from me, but lots of questions!!!
It came with an electric fuel pump but I think I want to get away from that and just get a priming bulb and use the mechanical pump on the motor. What is the benefit of the electric pump besides initial fuel on start up after sitting? Stock Buick 430 motor so not a high performance motor that might need extra fuel volume. I'm wondering if it is just the thing people do to make life easier or if there is a general knowledge everyone does that because it's better.
Thanks for any input.

If you have an electric pump before a mechanical then it’s just there to prime the system after it has been sitting. Ideally, after a motor has been sitting you want to pull the plugs and crank it until you have oil pressure. During that time the mechanical pump should be able to push some fuel to the carb so that electric pump isn’t needed.

Or, are you saying the boat has an electric pump currently and you want to switch to a mechanical?