WildmanC120 613 #1 Posted July 27, 2019 So my C-161 with the predator 22hp has one of the low pressure inline electric fuel pumps installed. I am on my 2nd one in a short time and this one is now not working. The engine came with a vacuum pump but it also died quickly and then filled the crankcase with fuel. What other options do I have or am I doing something wrong??? So this model has the tank under the seat. I have a small piece of line coming out of tank and then the pump mounted under seat on top of rear end then the fuel line goes all the way to the engine. Share this post Link to post Share on other sites
pacer 3,175 #2 Posted July 27, 2019 Which version are you using? the 'round' one or the 'square' one? I had bad luck with the round ones, am now running only the squares and so far much better...... Share this post Link to post Share on other sites
squonk 42,572 #3 Posted July 27, 2019 Is the pump not running or is it running but not pumping? Share this post Link to post Share on other sites
pfrederi 18,334 #4 Posted July 27, 2019 What brand. I had one of the ebay cheapie ones die. i have 3 Facet posiflo some are 3 years old no problems Share this post Link to post Share on other sites
953 nut 57,969 #5 Posted July 27, 2019 Have you checked the voltage output of your charging system? I have the inexpensive round fuel pumps on three of mine with no issues. I have them low on the frame so they only have to push the fuel. Share this post Link to post Share on other sites
wfrpalm 218 #6 Posted July 27, 2019 If the crankcase is getting fuel in it wouldn't that mean there is a problem with the float? Share this post Link to post Share on other sites
JoeM 7,935 #7 Posted July 28, 2019 I use these with no issues mounted back by the tank, must use a pre-filter though. Mr Gasket 42S E Bay $30. Share this post Link to post Share on other sites
953 nut 57,969 #8 Posted July 28, 2019 14 hours ago, wfrpalm said: If the crankcase is getting fuel in it wouldn't that mean there is a problem with the float? The vacuum operated fuel pumps obtained their pulsations from the pressure changes that occur in the engine's crank case as the piston moves up and down. If the pump has a diaphragm leak some fuel will be pulled into the crankcase. 1 Share this post Link to post Share on other sites
WildmanC120 613 #9 Posted July 28, 2019 I have been using the cheap round ones. Model HEP-02A Share this post Link to post Share on other sites
RandyLittrell 3,894 #10 Posted July 28, 2019 Here is a link for the good ones. https://www.aircraftspruce.com/catalog/eppages/solidstatepump.php Randy 1 1 Share this post Link to post Share on other sites
WildmanC120 613 #11 Posted July 28, 2019 12 minutes ago, RandyLittrell said: Here is a link for the good ones. https://www.aircraftspruce.com/catalog/eppages/solidstatepump.php Randy Thanks. I'll order one up and give it a shot. 1 Share this post Link to post Share on other sites
RandyLittrell 3,894 #12 Posted July 28, 2019 Just now, WildmanC120 said: Thanks. I'll order one up and give it a shot. I do not have one of those yet, but I saved the link from one of the more smarterer guys on here! Randy Share this post Link to post Share on other sites
