calboats
Seaman Apprentice
- Joined
- Jun 6, 2009
- Messages
- 41
Maybe here is a fix for some fuel delivery problems. My '87 EVrude 48 got a complete fuel system re-do last fall. Ran super the last couple runs on the lake.
What I did was plumb from the tank to a screw off water filter, then to a Mr. gasket #42S electric fuel pump (at the suggested 45deg. angle and low), then to an EMPI pressure regulator (set just close to the motors normal full throttle output) at 3 psi output. At this point, I put in a new squeeze primer bulb to start things flowing. From there it went to the stock vaccum EVrude pump in the cowling, and all hose is reinforced and ethanol proof, and see through -- so you can see exactly what's happening.
Last week I hooked up the flusher, test ran the motor, lubed and checked everything out, no problems. I get to the lake, squeeze the bulb and it almost literally falls apart just as the motor starts, both ends look rotted -- and I park under cover at home. After some cussing, I just flat removed the bulb, restarted the motor, checked the fuel flow, and started looking close to see what could go wrong.
Whole new deal !! Electric pumps fuel completely into the motor, makes enough of a humm to remind me to shut it off when not needed, no more hand priming, and I can see the fuel at all times. Performance wise, it just works, no motor rpm or OB sound difference whether one or both pumps on. I was wondering about the 12v. pumps restricting the flow to the cowl pump, evidentially not at the volume used by my motor.
The stock pump is 2 1/2psi. hr or thereabouts at full throttle, my elect. is set at 3 psi., about half way on the scale so as to not overpower the factory one. Thats around 25 gph or so, well enough to run most anything I would think. Yeah, I keep a sharp eye (& sniffer?) close to the 12v. pump -- but I use the same one in my Triumph Spitfire without a problem - which is what gave me the idea in the first place. Oh yeah, I do carry a second accessory hose and bulb in a locker, juuust in case !!
I hope this helps others, and generates comments, this forum, and the expert repair members have helped me a bunch, special thanks to all.
On the Water, Cal
member of "Coots" (Oregon wood boat builders) and TSCA (traditional small craft association) boating groups. PS, yeah, still trying to find time to get the smoked lexan windows in the removable cabin top.
What I did was plumb from the tank to a screw off water filter, then to a Mr. gasket #42S electric fuel pump (at the suggested 45deg. angle and low), then to an EMPI pressure regulator (set just close to the motors normal full throttle output) at 3 psi output. At this point, I put in a new squeeze primer bulb to start things flowing. From there it went to the stock vaccum EVrude pump in the cowling, and all hose is reinforced and ethanol proof, and see through -- so you can see exactly what's happening.
Last week I hooked up the flusher, test ran the motor, lubed and checked everything out, no problems. I get to the lake, squeeze the bulb and it almost literally falls apart just as the motor starts, both ends look rotted -- and I park under cover at home. After some cussing, I just flat removed the bulb, restarted the motor, checked the fuel flow, and started looking close to see what could go wrong.
Whole new deal !! Electric pumps fuel completely into the motor, makes enough of a humm to remind me to shut it off when not needed, no more hand priming, and I can see the fuel at all times. Performance wise, it just works, no motor rpm or OB sound difference whether one or both pumps on. I was wondering about the 12v. pumps restricting the flow to the cowl pump, evidentially not at the volume used by my motor.
The stock pump is 2 1/2psi. hr or thereabouts at full throttle, my elect. is set at 3 psi., about half way on the scale so as to not overpower the factory one. Thats around 25 gph or so, well enough to run most anything I would think. Yeah, I keep a sharp eye (& sniffer?) close to the 12v. pump -- but I use the same one in my Triumph Spitfire without a problem - which is what gave me the idea in the first place. Oh yeah, I do carry a second accessory hose and bulb in a locker, juuust in case !!
I hope this helps others, and generates comments, this forum, and the expert repair members have helped me a bunch, special thanks to all.
On the Water, Cal
member of "Coots" (Oregon wood boat builders) and TSCA (traditional small craft association) boating groups. PS, yeah, still trying to find time to get the smoked lexan windows in the removable cabin top.