New fuel pump

by Roger Lee in 912 / 914 Technical Questions 13 years ago

Page 9 of 15

Start
Prev
4
5
6
7
8
9
10
11
12
13
Next
End

Re: New fuel pump

by alessandro pezzola » 11 years ago

alessandro pezzola

1 4 0

hi Roger,
it's ok, thanks for your suggestion, I'll check all this. I wonder why the problem started the day after the new fuel pump... this engine count 350 hours without problems,even when I ran it in tha Alps at 14800 ft, and in the hot summer of Sicily

Report
Re: New fuel pump

by Roger Lee » 11 years ago

Roger Lee

126 5.14k 4.61k

There is a remote chance that the new pump is bad. That's why I suggested putting a mechanical gauge in line to confirm or rule out and actual mechanical pump problem.

Roger Lee
LSRM-A & Rotax Instructor & Rotax IRC
Tucson, AZ Ryan Airfield (KRYN)
520-349-7056 Cell

Report
Re: New fuel pump

by Ken kitzmann » 11 years ago

Ken kitzmann

0 24 16

Here are photo's of my Chinook Plus 2 with 80 912 UL with a return line & fuel pressure gauge successfully installed. I used the Rotax orifice jet which I installed into a blue Aluminum AN hose fitting by tapping the fat end of the fitting (had to use a thread pitch gauge to get correct tap) I made a 3 way set up from Blue Aluminum AN fittings for the restrictor which allows me to read the fuel pressure before the restrictor valve. Before the carbs I installed a 4-way Blue Aluminum AN set up ( with the 4 th fitting being the return line)...there is no room on the top of the Chinook engine to install the factory Banjo fittings/hoses that come with the engine now ( those fittings and hoses did not come with my engine when I bought it) My fuel now returns all the way to either strut mounted football tank (depending which way the selector valve is) It works great and the pressures are within spec.

IMG_0431.jpg (You do not have access to download this file.)

IMG_0435.jpg (You do not have access to download this file.)

IMG_0442.JPG (You do not have access to download this file.)

IMG_0416.jpg (You do not have access to download this file.)

IMG_0414.jpg (You do not have access to download this file.)

IMG_0419.JPG (You do not have access to download this file.)

IMG_0443.jpg (You do not have access to download this file.)

Report
Re: New fuel pump

by Ken kitzmann » 11 years ago

Ken kitzmann

0 24 16

The pic with the jet threaded into the blue AN hose fitting I ended up threading the jet in further to the the end of the threads. The pic with the fuel pump with the fuel line on the vent hose I came up with to see if and when the fuel pump leaks, i made the air holes to allow for the pulsation of air movement of the pump diaphragms, I figure the 3 vent holes equal the diameter of the vent on the pump.

Thank you said by: mark campbell

Report
Re: New fuel pump

by Ken kitzmann » 11 years ago

Ken kitzmann

0 24 16

These 2 pics show the jet threaded in all the way until it bottomed out on the threads I tapped. I tried to shine a flashlight in the hole for the pic.

IMG_0432.jpg (You do not have access to download this file.)

IMG_0433.jpg (You do not have access to download this file.)

Report

Page 9 of 15

Start
Prev
4
5
6
7
8
9
10
11
12
13
Next
End

You do not have permissions to reply to this topic.

Title	Category	Replies
fuel pump	912iS Technical Questions	8
Rotax 916IS Fuel Pump	General Tech Discussion	9
Fuel regulator	912 / 914 Technical Questions	7
912iS FUEL PUMP INTERMITTANT	General Tech Discussion	3
Coolants and what you thought you knew about them	General Tech Discussion	2

New fuel pump

Recent Videos

Safety First!

ROTALK News

Prize Giveaway!

Log In/Out

Login