67, 68 3.9 mercury am I missing a part on carb or ?

Walleye5150 · #1 October 30th, 2006, 09:34 PM

I have takin small gas engine repair 4 years in high school but haven't worked on a boat engine before. I just traded a 22 mag pistol for this engine and I plan on fixing this and I don't know nothing about it so I thought I would ask. With the cover off and where the gas line hooks up inside there is nothing over the gas line inlet is that the way it suppose to be. I'll see if this picture thing works. I'll try to post a picture.

AMD Rules · #2 October 30th, 2006, 09:47 PM

Shoot me an email with the pic. I have three of those motors, and might be able to help.

Either way, I can post the pic for ya.

/AMD

Walleye5150 · #3 October 30th, 2006, 09:58 PM

Give me your email address it won't let me attach to this forum email sorry Thanks AMD

AMD Rules · #4 October 30th, 2006, 10:34 PM

It is a spot for a rubber grommet to seat. The upper cowl houses the recoil for the starter, and needs to be tight against the lower cowl. The rubber grommet that is mounted in the upper cowl allows the fit to be be tight, yet flexible.

Click to see larger image

Walleye5150 · #5 October 30th, 2006, 10:39 PM

Thanks AMD For posting my picture. Looking straight down it's where the big hole is, than a smaller hole sits in it, thats where the gas line hooks up right or am I wrong.

AMD Rules · #6 October 30th, 2006, 10:50 PM

The fuel fitting is beneath that round hole, sticking out the front side. The round hole you see is not related to the fuel connection at all.

In the image below you can see the rubber grommets under the cowl that I was referring to.

Click to see larger image

Hope that helps.

Walleye5150 · #7 October 30th, 2006, 10:50 PM

I thought it was missing a part the way the butterfly works on carb , Well anyways I took the sparkplug out and there was a small hole on piston not all the way threw it, should I put new piston and rings in or what ?

AMD Rules · #8 October 30th, 2006, 10:58 PM

They're known to be an exceptionally reliable motor. Unfortunately you have a motor built many, many years ago. You need to evaluate the condition of the entire motor, including the lower unit to see if it would be worth the time/money to fix it. Parts are increasingly difficult to get for it. You might be better off looking for a donor motor.

Good luck either way.

Walleye5150 · #9 October 30th, 2006, 11:00 PM

Ok I see what your saying the fuel line had hole in it all the way threw it when you looked down it went all the way threw it I guess it is old lol look like fuel flowed threw that and another part was missing to carb

Walleye5150 · #10 October 30th, 2006, 11:02 PM

Worn out fuel lines