Will this fuel pump work?

Ordered a new one and, of course, it's different from the original one.
Anyone know if this will fit and work correctly for my '85 with 351?

It is. Ordered while still on the lake yesterday. Getting a marine pump will cost me about $250 plus probably 2-3 weeks time to get here. I can return this if it won't work.

You can make it work temporarily..... You have to change out some fuel lines to rubber. Keep all the original hard fuel lines as is, so you can reuse them when the correct marine pump arrives.

Can't you have this one shipped to you for under $250 to your door?
fuel pump

Could be the pump... But I bet it's not.

Sander,
You mentioned you didn't have a way to measure the pump pressure but, all it takes is a plain mechanical gauge like you would find on a air compressor and then a T fitting. You must have some kind of industrial supply for the gauge? Go for a low psi scale like 0 to 15 psi. If all you can get is a gauge in bars' that's fine too and will just exercise our math! Is your mechanic guessing or did he actually see what pressure the pump is producing? Is the pump discharging any fuel to the flame arrestor via the safety (most are clear) tubing?

MrMcD wrote: it seems to me there is a check valve at the tank that plugs or sticks causing engines to starve for gas..

Mark,
You must be thinking about the anti-siphon valve. It's not a true check valve but rather a USCG required device. In case of a leak in the fuel line from the tank, it prevents filling the bilge with gas. Yes, they do plug up.

Borrowed a pressure meter today. It didn't do a thing, needle didn't leave "0". Must have done something wrong, though I can't imagine what. So that didn't help much. At all.

Pete, I didn't see any fuel going to the flame arrestor, though hard to tell cause tubing isn't that clear. Don't know what that indicates though?

JohnnyQuest, after shipping and handling and duties, that $89 will be close to fore-mentioned amount I'm afraid.

Thanks for the input guys!

TRIP wrote: Borrowed a pressure meter today. It didn't do a thing, needle didn't leave "0". Must have done something wrong, though I can't imagine what. So that didn't help much. At all. Pete, I didn't see any fuel going to the flame arrestor, though hard to tell cause tubing isn't that clear. Don't know what that indicates though?

Sander,
Do you remember what the scale was on the gauge? The fuel pump delivers around 6 Psi and the reason I suggested a 0 to 15 psi gauge. If the gauge has a higher scale, it would be hard to see any pressure.

Not seeing any fuel going to the arrestor is good. On a marine pump if the diaphragm inside the pump develops a leak, fuel goes back to the carb instead of into the bilge or the engine crankcase. It's a USCG thing.

KENO wrote: Hi Trip Use a piece of clear tubing and you can see if the pump is sucking from the can and runs good. If it doesn't suck, then it's probably pump related If it sucks and runs good, look at the anti siphon valve on the tank or the line from the tank to the pump or a filter if there's one on the suction side. KenO

Kens idea isn't bad but only from the standpoint of if the engine "runs good". You will not be able to tell if the pump is bad or going bad from looking at fuel in a clear piece of tubing. You may see flow but at what pressure and difficult to detect the direction of flow. Besides leaks in pump diaphragms, there are also check valves inside the pump. If they plug up from say varnish, fuel will be pumped back and forth instead of just to the carb. Yes, "runs good" is what you really want but also you don't want to be stuck out in the middle of the lake!

Maybe I should simplify this

Hook it to the can,use whatever tubing you want if the problem goes away, it's not the fuel pump.

KenO

Check/clean the anti-siphon first, cost's nothing but a little time

Thanks again everybody!

Think I'll have a chance to go to the boat tomorrow. Will check vent screen, but if that's clogged I'd also have problems when filling up the tank, 'cause air can't escape, right?
And also I'll let the pump suck straight from a gas can.

Pete, indeed the gauge that I had went to 50psi, so that' probably the reason the needle didn't move a bit. Tried to find another meter but only found one with even larger scale (100psi).

Found a friend who's coming down to CR this weekend who will bring me a new pump. Might not be needed, then I'll just keep it as a spare, or maybe sell it. Figured I could get it now for $89. If I waited and it did turn out to be the pump it'd cost double to triple.

Dying to figure out what it is. And to ride!
Thanks again!

Problem persists.
Have only found pressure meters that read up to 100 psi or so. I'll keep looking for one.
Or I might just change the pump to see if it solves the issue, since I have a new one anyway. How hard or easy is it to change it, for a not very mechanically inclined person like me (I'm always very pleased already when I managed to change the impeller or change oil, that level :p)
To be continued....

Thanks Pete, sounds like even I can do it!

Hope to put her in the water today. Started wetsanding/buffing as well though so let's see where it ends today.

get a freakin' gauge already as i'm not even sure fuel is your problem...