That looks like a pulse pump - not a mechanical pump. It does not want constant vacuum- but pulse vacuum to make a pumping action (regulated by two valves on the intake and exit side of the pump).
If you “t” the exit side of the pump, you should get 3-6 psi of fuel… M. Get Outlook for iOS<https://aka.ms/o0ukef> ________________________________ From: KRnet <krnet-boun...@list.krnet.org> on behalf of dee david via KRnet <krnet@list.krnet.org> Sent: Saturday, May 13, 2023 5:40:25 PM To: KRnet <krnet@list.krnet.org> Cc: dee david <deesa...@gmail.com> Subject: Re: KRnet> Need help starting my KR2 ..please Luis, I want to thank you for your help. It is mainly because of you that I got this far. Dee On Sat, May 13, 2023, 12:23 PM Luis Claudio via KRnet <krnet@list.krnet.org<mailto:krnet@list.krnet.org>> wrote: Dee: There is no fundamental difference between your setup and mine other than the brands of injectors. Here is a video of Rex Taylor explaining the ins and outs of the Posa Injector and how to best start these engines... Posa Carburetor Tuning - YouTube<https://www.youtube.com/watch?v=AOV1_6P17rc&t=4352s> <https://www.youtube.com/watch?v=AOV1_6P17rc&t=4352s> [https://s.yimg.com/nq/storm/assets/enhancrV2/23/logos/youtube.png] Posa Carburetor Tuning Luis On Friday, May 12, 2023 at 09:14:21 PM CDT, dee david via KRnet <krnet@list.krnet.org<mailto:krnet@list.krnet.org>> wrote: okay, this is were I am. Let me state some facts first 1. Fuel is supplied to the engine by means of a POSA throttle body.. 2. Yes, the pump plunger is plumber correctly. - just old. 3. Got the pump plunger to work properly so that it dumps fuel into the cylinder. 5. Fuel is in the gascolator as stated before (quick drain). 6. Fuel is not getting into the throttle body. 7. Got the engine to come to life for a few seconds by pumping starter fluid into the manifold and pumping fuel thru the primer port. I've attached a picture of my POSA throttle body. Please look at the item below it... I presume this is a mechanical pump (not sure) fuel goes in from the gascolator and exits to the throttle body. No fuel is coming out of it! FYI question - what pressure is expected for the fuel entering the POSA throttle body? Is a pump required or the suction vacuum enough to draw the fuel into the throttle body? [IMG_20230512_173750.jpg] On Fri, May 12, 2023 at 2:27 PM Flesner via KRnet <krnet@list.krnet.org<mailto:krnet@list.krnet.org>> wrote: On 5/12/2023 9:57 AM, dee david via KRnet wrote: > > 2. Why is the pressure not forcing the fuel to the primer > plunger? Laws of physics say it should be there.. right? > > Any comments will be appreciated > +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Is the primer plumbed correctly, i.e., when you pull out on the primer does it fill with fuel? Cut the system in half to troubleshoot. It has to get fuel before it can dispense fuel. It sounds like you expect fuel to be at the primer inlet from gravity when you pull out the plunger. Remove that connection and verify. If not, work backwards. That system is a basic system like a series circuit in electronics. If it is not working at some point work backwards till you find where it is working then identify and fix the problem. This is all a "guess" on my part. Larry Flesner -- KRnet mailing list KRnet@list.krnet.org<mailto:KRnet@list.krnet.org> https://list.krnet.org/mailman/listinfo/krnet -- KRnet mailing list KRnet@list.krnet.org<mailto:KRnet@list.krnet.org> https://list.krnet.org/mailman/listinfo/krnet -- KRnet mailing list KRnet@list.krnet.org<mailto:KRnet@list.krnet.org> https://list.krnet.org/mailman/listinfo/krnet
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