Lycoming IO 360 M1B

C-J · #1 05-21-2009, 03:48 PM

I'm on the final throws of the engine plumbing ans wiring on my RV7 and I have two items left that still puzzle me.

1) In the middle top of the engine there is the injector feed distributor with the 4 small fuel line going to each cylinder and one small AN fitting that is marked gage. How is this used? I have a fuel flow and pressure already installed. What does this one give me pressure to the injectors?

2) There is a vent on the engine driven pump, how is this used/plumed?

Help is appreciated, I see a light at the end of the tunnel and it might not be a train! ;-)

mlwynn · #2 05-21-2009, 04:48 PM

I don't know for sure about the fitting on the top, but the one on your engine driven pump is for overflow if the pump diaphragm fails (as it has been explained to me). Most people put a npt to tubing fitting and then run a tube down the front of the firewall and vent it just behind the cowling. Usually, nothing will come out of that tube. The tubing run is on the firewall drawings.

Maybe a picture of the fitting on the top of the engine would help a more knowledgeable person identify it for you.

Regards,

Michael Wynn
RV 8 FWF
San Ramon, CA

allbee · #3 05-21-2009, 05:27 PM

Quote:

Originally Posted by C-J

I'm on the final throws of the engine plumbing ans wiring on my RV7 and I have two items left that still puzzle me.

1) In the middle top of the engine there is the injector feed distributor with the 4 small fuel line going to each cylinder and one small AN fitting that is marked gage. How is this used? I have a fuel flow and pressure already installed. What does this one give me pressure to the injectors?

2) There is a vent on the engine driven pump, how is this used/plumed?

Help is appreciated, I see a light at the end of the tunnel and it might not be a train! ;-)

The fitting marked gauge is for diagnostic testing. All other fittings are for going to the various cylinders. In fact if you want to change things around you can put any fitting to any cylinder. Just don't use the one marked gauge for the cylinders.

C-J · #4 05-21-2009, 06:34 PM

Thanks Mike, I looked everywhere on Vans dwgs and in the Lycoming manual with no joy. There is a part in the FF kit that is a small 90degree pipe fitting with a tube welded to it, I bet that is the fitting? what do you think?

Quote:

Originally Posted by mlwynn

I don't know for sure about the fitting on the top, but the one on your engine driven pump is for overflow if the pump diaphragm fails (as it has been explained to me). Most people put a npt to tubing fitting and then run a tube down the front of the firewall and vent it just behind the cowling. Usually, nothing will come out of that tube. The tubing run is on the firewall drawings.

Maybe a picture of the fitting on the top of the engine would help a more knowledgeable person identify it for you.

Regards,

Michael Wynn
RV 8 FWF
San Ramon, CA

C-J · #5 05-21-2009, 06:36 PM

Steve, there is no cap on the fitting, doesn't it require something? Currently, Lycoming put a red plastic cap on it, I'm sure it can't stay like that.

Quote:

Originally Posted by allbee

The fitting marked gauge is for diagnostic testing. All other fittings are for going to the various cylinders. In fact if you want to change things around you can put any fitting to any cylinder. Just don't use the one marked gauge for the cylinders.

Chappyd · #6 05-21-2009, 07:08 PM

I have the IO-360 M1B, and asked this same question. check out this thread, and see if it applyies

http://www.vansairforce.com/communit...ad.php?t=40949

C-J · #7 05-21-2009, 07:49 PM

Thanks Dave, I was hoping I didn't need to run another set of tubes. It all make perfect sense to me now. Best CJ

Quote:

Originally Posted by Chappyd

I have the IO-360 M1B, and asked this same question. check out this thread, and see if it applyies

http://www.vansairforce.com/communit...ad.php?t=40949