Electric Fuel Pump???

[NetDoc]

Re: Electric Fuel Pump???

I put in this one... it's incredibly quiet when the fuel finally hits it.

Micro Electric Fuel Pump

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[mnc1960]

Re: Electric Fuel Pump???

Hey guys and THANK YOU for all of the advice. Now I will be going with the NEW fuel pump with the vent line port to the carbie. Now the boat and motor are very good condition and the previous owner had completed about 90% restoration on it and I am completing the resto which basically is just a few minor things plus the things I have found out here in this forum by asking about things and finding out about things that never entered my mind seeing it is the first time I have owned a Mercruiser I/O setup. I know what fuel and sparks/hot metal is like when they mix as I have assisted at a couple of on water boat fires plus I am a retired Professional Firefighter/Aviation Crash Rescue Officer (20years service) so safety and doing it right the first time is the priority for me plus the boat will NOT go out onto the water until it is totally right and safe. If something does go horribly wrong out on the water there is not many places you can go especially when fire is involved.

So thanks so much for all of the good and sensiable advice. As with anything I get for the first time and not sure about I will always ask for assistance from people in the know. Thanks once again guys. :redface:

 

[achris]

Re: Electric Fuel Pump???

This is the one I'm going to buy for my project:

http://shop.advanceautoparts.com/we...el-Pump-Airtex_99994892-P_52_R|GRPFUE2AMS____

You can use coupon code "BIG30" to get an additional $30 off.

I have that pump in my Landcruiser, it's VERY noisy. I can hear it running above the sound of the engine (6.5L GM V8 diesel) at idle. It's mounted to the chassis, not the body and I used the rubber insulators. I would NOT recommend it in a boat....

 

[Fishermark]

Re: Electric Fuel Pump???

Now I will be going with the NEW fuel pump with the vent line port to the carbie.

I think that is a wise decision!

Here's a post where I replaced the fuel pump on my inline six. I post it here again because you may run into some of what I did as the fuel pump I replaced also did not have the clear overflow hose, while the new one did. I ended up having to put together a piece to attach to the flame arrester for the vent line from the valve cover.

Here's the pump in ended up buying (same one I posted in above in reply #9):

Here's what I ended up doing to hook it all up at the carb:

 

[1977 SILVERLINE]

Re: Electric Fuel Pump???

I put an electric pump in my 77 silverline. I can't remember the make of the pump but it is a vane pump rather than a pulsating pump. I have had good luck with it except for the noise. It is quite noisy at idle but anything greater than that is is not noticable. I did not install this pump to replace my mechanical one, which is still in place. I installed this pump because my fuel tank is in the front under the bow. The mechanical pump had to suck some 25' from the pump to the fuel tank by the time it went from one side of the boat to the other and back, then it had to suck through a tube in the top of the tank. I was having hard starting issues when it was hot. I installed the pump close to the tank so it only has to suck 2' and it is able to push the cool fuel to the carb.

 

[mnc1960]

Re: Electric Fuel Pump???

Hi Fishermark, Thanks for the photo's. Now my only questions about these photo's is the one of the carbie. the clear tubing is that going into the flame arrestor underneath or is it going directly into the top of the carbie? as I cannot see how you have don it via that photo. Now if it goes directly to the underside of the flame arrestor is that a small "L" shaped brass fitting you have placed in the bottom of the Flame Arrestor? Also will have the Water Reversal Kit arriving soon so I can do that as well. Look forward to your reply and thanks for the photo's.

 

[ziggy]

Re: Electric Fuel Pump???

on the older L6's, the crakcase ventilation was from the valve cover to the top of the carb. the valve cover side ya can see, this is the connection to the carb.

the brass fitting. this is from a '72 L6. this is the connection used by fm for the third line coming from the fuel pump.
that means there was no where for the crankcase vent to go. so then he copied the newer version L6 crankcase ventilation.

the newer style L6's had the crankcase ventilation like this..

which is what fm converted over too because he used the original crankcase vent for the fuel dump from the fuel pump should the diaphragm rupture. on the newer style crankcase ventilation, the brass nipple on the carb is replaced with a plug. it's not used, though the threaded hole is still there. that pic is from a '75 L6.. the end ya can't see in the pic goes to the valve cover to what looks like a pcv valve. it's not, it's just a crankcase vent via a different place on the valve cover. the '72 and '75 valve covers are different. '72 the vent exits the side of the valve cover, the '75 it exits on the top of the valve cover.

fwiw. if i replaced my fuel pump, i'd do it exactly as fm did it. great job fm.

 

[Fishermark]

Re: Electric Fuel Pump???

Exactly what Ziggy said!


Here's a pic without the flame arrester - it's not as easy to see as Ziggy's pic, but if you look closely you can see the fitting just below the top of the carb. That is where the clear hose will go. Then the vent hose from the valve cover will get relocated to the flame arrester.

 

[mnc1960]

Re: Electric Fuel Pump???

Hey Ziggy and Fishermark, Thank you so much for the pic's as the old saying goes "Apicture is worth a thousand words" plus by looking at your pic's I have noticed that the throttle linkages on my carb have been setup slightly wrong so I will redo these as well. I have looked at my carb and found the plug which has been put in place of the fitting used on your one's. I actually have one of those fittings laying around in the shed so will have a look for it, if cannot find it then head off down to the mercruiser dealer or the local hardware shop to get one plus the tubing to suit.

Now got my new throttle cable today and have fitted it. The old one was stuffed and the throttle was SOOOOOOO hard to push open. The old cable was about 6 inches to short (12' 6"s long) so it was resting hard up against the Exhaust Elbow and the outer cover had slightly melted. So I ordered a new one that was 13' long and it fit's spot on with clearance right around the rear of the engine plus it has alowed me to slightly relocate the forward controls higher - so WIN WIN situation and both the throttle and selector cables now operate as smooth as silk.

You guys are tops and once again thankyou so much for all of the help.