Q-jet ?

MEXJOE · 11-22-2013, 11:27 PM

I HAVE A Q-JET OFF A MER-CRUSER BOAT MOTOR.
The needle and seat is different from all the car stuff I have seen.
It's not the strip-out replacement part.
It's not the old style (65/66) enclosed seat.

The difference is this.

The thing looks exactly like every other one I have seen.
Except the needle its self has a small spring loaded check ball at the top,
ON THE TIP THAT COMES IN CONTAT WITH THE FLOAT.???

Anyone on here ever see this could you explain what it's for?

One more thing, this carb has the largest, longest,plastic stuffer block
I have ever seen.

I assume the stuffer block is to allow a low float level in a boat to prevent fuel slosh.

I don't know it's just a crazy looking thing to me.

Thanks in advance for the help.

Glen

Alan Nyhus · 11-23-2013, 12:00 AM

I've seen a couple of marine Q-Jets like that. The spring loaded needle & seat helps with fuel slosh during tight turns. -Al

MEXJOE · 11-23-2013, 09:54 AM

The new kit has one without the ball. Do you think it will be ok?

Quote:

Originally Posted by Alan Nyhus

I've seen a couple of marine Q-Jets like that. The spring loaded needle & seat helps with fuel slosh during tight turns. -Al

Alan Roehrich · 11-23-2013, 10:37 AM

I would not use a needle that does not have spring stabilization in a boat, if the original had one in it. The rough ride you get in a boat on the water bounces the float around a lot, and you'll have problems with keeping a stable fuel level in the float bowl. A Q-Jet is fairly sensitive to fuel level for metering purposes.

MEXJOE · 11-23-2013, 02:13 PM

we used it over it vacuum tested fine and was working when removed.
Thanks for the help.

Quote:

Originally Posted by Alan Roehrich

I would not use a needle that does not have spring stabilization in a boat, if the original had one in it. The rough ride you get in a boat on the water bounces the float around a lot, and you'll have problems with keeping a stable fuel level in the float bowl. A Q-Jet is fairly sensitive to fuel level for metering purposes.

11-22-2013, 11:27 PM	#1
MEXJOE Senior Member Join Date: Jun 2008 Location: nhranumbers.com Posts: 875 Likes: 137 Liked 165 Times in 51 Posts	Q-jet ? I HAVE A Q-JET OFF A MER-CRUSER BOAT MOTOR. The needle and seat is different from all the car stuff I have seen. It's not the strip-out replacement part. It's not the old style (65/66) enclosed seat. The difference is this. The thing looks exactly like every other one I have seen. Except the needle its self has a small spring loaded check ball at the top, ON THE TIP THAT COMES IN CONTAT WITH THE FLOAT.??? Anyone on here ever see this could you explain what it's for? One more thing, this carb has the largest, longest,plastic stuffer block I have ever seen. I assume the stuffer block is to allow a low float level in a boat to prevent fuel slosh. I don't know it's just a crazy looking thing to me. Thanks in advance for the help. Glen __________________ Glen DeMenge 1969 Camaro Stock Eliminator

11-23-2013, 12:00 AM	#2
Alan Nyhus VIP Member Join Date: Dec 2002 Location: Lower Dakota territory Posts: 1,180 Likes: 1,074 Liked 799 Times in 236 Posts	Re: Q-jet ? I've seen a couple of marine Q-Jets like that. The spring loaded needle & seat helps with fuel slosh during tight turns. -Al __________________ "That'll never work....."

11-23-2013, 10:37 AM	#4
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,106 Likes: 1,564 Liked 1,789 Times in 408 Posts	Re: Q-jet ? I would not use a needle that does not have spring stabilization in a boat, if the original had one in it. The rough ride you get in a boat on the water bounces the float around a lot, and you'll have problems with keeping a stable fuel level in the float bowl. A Q-Jet is fairly sensitive to fuel level for metering purposes. __________________ Alan Roehrich 212A G/S