fuel problems

Y

yamahardro1

Cadet
Joined
Jul 28, 2010
Messages
7
hey guys,
i have an '87 merc 3.0l. i recently did a full tune up, replaced the starter, installed new fuel pump (pump was badly corroded, diaphragm was severely dry-rotted)

problem: engine cranks, i have good spark. NO FUEL. i hooked up an auxiliary tank directly to the inlet of the pump and still, nothing. took the line off carburetor and checked, completely dry. please help!!!
 
Bondo

Bondo

Moderator
Staff member
Joined
Apr 17, 2002
Messages
70,513
Re: fuel problems

Ayuh,... The pump ain't pumping, take it off,+ see Why...
 
Y

yamahardro1

Cadet
Joined
Jul 28, 2010
Messages
7
Re: fuel problems

ayuh,? what are you,.. doing karate? ..everyone loves a smartass, so thanks.

pump is brand new, meaning all internals are brand new. is there a way of checking the lobe within the block that causes the pump to function? are you supposed to prime these pumps prior to install.

anyone with something resembling an intelligent answer would be much appreciated
 
NHGuy

NHGuy

Captain
Joined
May 21, 2009
Messages
3,631
Re: fuel problems

Bond-O says ayuh all the time. I think he's from Maine.
Oh and BTW his word is gold. So pull off that pump and hand cycle it to see if it works. If it does you have to make sure you have a good fuel line back to your tank so the pump can prime itself. If the line is holy or the tank pickup won't give gas you mighta not needed a pump.
 
Bondo

Bondo

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Staff member
Joined
Apr 17, 2002
Messages
70,513
Re: fuel problems

pump is brand new, meaning all internals are brand new. is there a way of checking the lobe within the block that causes the pump to function? are you supposed to prime these pumps prior to install.
Click to expand...

Ayuh,.... Brand new merely increases the odds of it Workin'...
Like I said,...
Take it Off the motor,...
Pump it by hand,.. run hoses from vessel to vessel,+ Pump it...
Does it Work,..??

While it's Off,.... LOOK into the block,... What do ya See,..?? Does it Move,..??
Do you have the Right pump,..??

Are the lines clear,..??
 
L

Lyle29464

Lieutenant
Joined
Mar 10, 2009
Messages
1,261
Re: fuel problems

yamahardro1 said:
ayuh,? what are you,.. doing karate? ..everyone loves a smartass, so thanks.

anyone with something resembling an intelligent answer would be much appreciated
Click to expand...

If you have a 23 year old merc. you need bond-o, god and a couple of others on the forum.
 
H

HT32BSX115

Supreme Mariner
Joined
Dec 8, 2005
Messages
10,083
Re: fuel problems

yamahardro1 said:
anyone with something resembling an intelligent answer would be much appreciated
Click to expand...

I'd be surprised if you get any answer now.

You might slide on over to another board where the answers might be more to your liking.

I don't think I could even understand what your problem is.......
 
Y

yamahardro1

Cadet
Joined
Jul 28, 2010
Messages
7
Re: fuel problems

figured it out guys, and ok, ok, i apologize for the attitude, this just severely urked me!

so after going nuts for 2 days, i decided to completely disassemble my brand new pump....ha! found the gasket between the bowl and midchamber was installed incorrectly from the factory. flipped the gasket, put it all back together, cranked for 3 seconds and presto, runs like a champ.
 
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