---------------------------------------------------------- Yak-List Digest Archive --- Total Messages Posted Thu 07/18/19: 11 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 01:13 AM - Yak 52 Primer issue (ZUDSJ) 2. 10:07 AM - Re: Yak 52 Primer issue (Walter Lannon) 3. 10:25 AM - Re: Yak 52 Primer issue (Walter Lannon) 4. 11:08 AM - Re: Yak 52 Primer issue (Anthony Savarese) 5. 02:31 PM - Re: Yak 52 Primer issue (mark bitterlich) 6. 04:17 PM - Re: Yak 52 Primer issue (Anthony Savarese) 7. 04:31 PM - Re: Yak 52 Primer issue (ZUDSJ) 8. 04:57 PM - Re: Re: Yak 52 Primer issue (Anthony Savarese) 9. 06:21 PM - Re: Re: Yak 52 Primer issue (Peter Scott) 10. 09:33 PM - Re: Re: Yak 52 Primer issue (Walter Lannon) 11. 09:52 PM - Re: Re: Yak 52 Primer issue (Walter Lannon) ________________________________ Message 1 _____________________________________ Time: 01:13:50 AM PST US Subject: Yak-List: Yak 52 Primer issue From: "ZUDSJ" Perplexed by the primer and hoping to get some info if possible. Does anyone have a diagram of the Yak 52 primer? It was quite tight and when we attempted to prime the system no pressure appeared on the fuel pressure gauge. We loosened the friction nut to the point that it was removed completely When we put it back it would prime the system and the cylinder but we could not rotate it to the centred position. Even though no fuel pressure was showing while priming, there was fuel going to the cylinders because it flowed out when we opened the manifold valve at the bottom of the engine. If we tighten the friction nut it does not move at all. When we loosen the friction nut again it can rotate left and right but not go back to the centre. Anyone had this experience? Read this topic online here: http://forums.matronics.com/viewtopic.php?p=490372#490372 ________________________________ Message 2 _____________________________________ Time: 10:07:27 AM PST US From: "Walter Lannon" Subject: Re: Yak-List: Yak 52 Primer issue Where to begin! The Yak 52 "primer" is a dual unit with a central OFF position. One side when selected is a hand pump delivering fuel through the by-pass in the engine driven fuel pump to the carb. It is an emergency pump in the event of primary (engine driven) pump failure. The other side is a primer delivering fuel to the top of the blower chamber through a nozzle where (in theory) it is atomized and delivered by blower (supercharger) rotation to the cylinders. In fact (IMHO) it mostly just flows down the chamber walls to the #5 cylinder where (if you have your head up your ass) it will give you a hydraulic lock. Since I have a CJ I don't know which side is which! (Dennis?) The CJ uses exactly the same unit however it is modified to act as a primer only on either side. Very simple, short by-pass tube. The hand (emerg.) fuel pump is a separate unit (wobble pump). Presumably you have removed the pump handle and on re-installing it have filed to align the drive for the valve control. Find a 1/2" or so wood dowel and file a notch in one end so you can correct that. Walt -----Original Message----- From: ZUDSJ Sent: Thursday, July 18, 2019 1:13 AM Subject: Yak-List: Yak 52 Primer issue Perplexed by the primer and hoping to get some info if possible. Does anyone have a diagram of the Yak 52 primer? It was quite tight and when we attempted to prime the system no pressure appeared on the fuel pressure gauge. We loosened the friction nut to the point that it was removed completely When we put it back it would prime the system and the cylinder but we could not rotate it to the centred position. Even though no fuel pressure was showing while priming, there was fuel going to the cylinders because it flowed out when we opened the manifold valve at the bottom of the engine. If we tighten the friction nut it does not move at all. When we loosen the friction nut again it can rotate left and right but not go back to the centre. Anyone had this experience? Read this topic online here: http://forums.matronics.com/viewtopic.php?p=490372#490372 --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus ________________________________ Message 3 _____________________________________ Time: 10:25:07 AM PST US From: "Walter Lannon" Subject: Re: Yak-List: Yak 52 Primer issue Typo in my last - "filed" should read "failed". Also should have noted there is no fuel pressure indication for the "prime" operation. Walt -----Original Message----- From: ZUDSJ Sent: Thursday, July 18, 2019 1:13 AM Subject: Yak-List: Yak 52 Primer issue Perplexed by the primer and hoping to get some info if possible. Does anyone have a diagram of the Yak 52 primer? It was quite tight and when we attempted to prime the system no pressure appeared on the fuel pressure gauge. We loosened the friction nut to the point that it was removed completely When we put it back it would prime the system and the cylinder but we could not rotate it to the centred position. Even though no fuel pressure was showing while priming, there was fuel going to the cylinders because it flowed out when we opened the manifold valve at the bottom of the engine. If we tighten the friction nut it does not move at all. When we loosen the friction nut again it can rotate left and right but not go back to the centre. Anyone had this experience? Read this topic online here: http://forums.matronics.com/viewtopic.php?p=490372#490372 --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus ________________________________ Message 4 _____________________________________ Time: 11:08:03 AM PST US From: Anthony Savarese Subject: Re: Yak-List: Yak 52 Primer issue Primer left is the system side. Primer right is cylinder side. Up/center is off. Dennis Sent from my iPhone > On Jul 18, 2019, at 12:24 PM, Walter Lannon wrote: > > > Typo in my last - "filed" should read "failed". > > Also should have noted there is no fuel pressure indication for the "prime" operation. > > Walt > > -----Original Message----- From: ZUDSJ > Sent: Thursday, July 18, 2019 1:13 AM > To: yak-list@matronics.com > Subject: Yak-List: Yak 52 Primer issue > > > Perplexed by the primer and hoping to get some info if possible. Does anyone have a diagram of the Yak 52 primer? > It was quite tight and when we attempted to prime the system no pressure appeared on the fuel pressure gauge. We loosened the friction nut to the point that it was removed completely When we put it back it would prime the system and the cylinder but we could not rotate it to the centred position. Even though no fuel pressure was showing while priming, there was fuel going to the cylinders because it flowed out when we opened the manifold valve at the bottom of the engine. If we tighten the friction nut it does not move at all. When we loosen the friction nut again it can rotate left and right but not go back to the centre. Anyone had this experience? > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=490372#490372 > > > > > > > > > > --- > This email has been checked for viruses by Avast antivirus software. > https://www.avast.com/antivirus > > > > ________________________________ Message 5 _____________________________________ Time: 02:31:18 PM PST US Subject: Re: Yak-List: Yak 52 Primer issue From: mark bitterlich VW5sZXNzIHlvdSBvd24gYSBZQUstNTAgYW5kIHRoZW4gaXQncyByZXZlcnNlZCHCoCAoSGkgRGVu bmlzISnCoMKgTWFyawotLS0tLS0tLSBPcmlnaW5hbCBtZXNzYWdlIC0tLS0tLS0tRnJvbTogQW50 aG9ueSBTYXZhcmVzZSA8ZHNhdmFyZXNlMDgxMkBiZWxsc291dGgubmV0PiBEYXRlOiA3LzE4LzE5 ICAxNDowNyAgKEdNVC0wNTowMCkgVG86IHlhay1saXN0QG1hdHJvbmljcy5jb20gU3ViamVjdDog UmU6IFlhay1MaXN0OiBZYWsgNTIgUHJpbWVyIGlzc3VlIC0tPiBZYWstTGlzdCBtZXNzYWdlIHBv c3RlZCBieTogQW50aG9ueSBTYXZhcmVzZSA8ZHNhdmFyZXNlMDgxMkBiZWxsc291dGgubmV0PlBy aW1lciBsZWZ0IGlzIHRoZSBzeXN0ZW0gc2lkZS4gUHJpbWVyIHJpZ2h0IGlzIGN5bGluZGVyIHNp ZGUuIFVwL2NlbnRlciBpcyBvZmYuIERlbm5pc1NlbnQgZnJvbSBteSBpUGhvbmU+IE9uIEp1bCAx OCwgMjAxOSwgYXQgMTI6MjQgUE0sIFdhbHRlciBMYW5ub24gPHdsYW5ub25Ac2hhdy5jYT4gd3Jv dGU6PiA+IC0tPiBZYWstTGlzdCBtZXNzYWdlIHBvc3RlZCBieTogIldhbHRlciBMYW5ub24iIDx3 bGFubm9uQHNoYXcuY2E+PiA+IFR5cG8gaW4gbXkgbGFzdCAtICJmaWxlZCIgc2hvdWxkIHJlYWQg ImZhaWxlZCIuPiA+IEFsc28gc2hvdWxkIGhhdmUgbm90ZWQgdGhlcmUgaXMgbm8gZnVlbCBwcmVz c3VyZSBpbmRpY2F0aW9uIGZvciB0aGUgInByaW1lIiBvcGVyYXRpb24uPiA+IFdhbHQ+ID4gLS0t LS1PcmlnaW5hbCBNZXNzYWdlLS0tLS0gRnJvbTogWlVEU0o+IFNlbnQ6IFRodXJzZGF5LCBKdWx5 IDE4LCAyMDE5IDE6MTMgQU0+IFRvOiB5YWstbGlzdEBtYXRyb25pY3MuY29tPiBTdWJqZWN0OiBZ YWstTGlzdDogWWFrIDUyIFByaW1lciBpc3N1ZT4gPiAtLT4gWWFrLUxpc3QgbWVzc2FnZSBwb3N0 ZWQgYnk6ICJaVURTSiIgPHdhZmVyZmxleEBnbWFpbC5jb20+PiA+IFBlcnBsZXhlZCBieSB0aGUg cHJpbWVyIGFuZCBob3BpbmcgdG8gZ2V0IHNvbWUgaW5mbyBpZiBwb3NzaWJsZS4gRG9lcyBhbnlv bmUgaGF2ZSBhIGRpYWdyYW0gb2YgdGhlIFlhayA1MiBwcmltZXI/PiBJdCB3YXMgcXVpdGUgdGln aHQgYW5kIHdoZW4gd2UgYXR0ZW1wdGVkIHRvIHByaW1lIHRoZSBzeXN0ZW0gbm8gcHJlc3N1cmUg YXBwZWFyZWQgb24gdGhlIGZ1ZWwgcHJlc3N1cmUgZ2F1Z2UuIFdlIGxvb3NlbmVkIHRoZSBmcmlj dGlvbiBudXQgdG8gdGhlIHBvaW50IHRoYXQgaXQgd2FzIHJlbW92ZWQgY29tcGxldGVsecOi4oKs wqYgV2hlbiB3ZSBwdXQgaXQgYmFjayBpdCB3b3VsZCBwcmltZSB0aGUgc3lzdGVtIGFuZCB0aGUg Y3lsaW5kZXIgYnV0IHdlIGNvdWxkIG5vdCByb3RhdGUgaXQgdG8gdGhlIGNlbnRyZWQgcG9zaXRp b24uIEV2ZW4gdGhvdWdoIG5vIGZ1ZWwgcHJlc3N1cmUgd2FzIHNob3dpbmcgd2hpbGUgcHJpbWlu ZywgdGhlcmUgd2FzIGZ1ZWwgZ29pbmcgdG8gdGhlIGN5bGluZGVycyBiZWNhdXNlIGl0IGZsb3dl ZCBvdXQgd2hlbiB3ZSBvcGVuZWQgdGhlIG1hbmlmb2xkIHZhbHZlIGF0IHRoZSBib3R0b20gb2Yg dGhlIGVuZ2luZS4gSWYgd2UgdGlnaHRlbiB0aGUgZnJpY3Rpb24gbnV0IGl0IGRvZXMgbm90IG1v dmUgYXQgYWxsLiBXaGVuIHdlIGxvb3NlbiB0aGUgZnJpY3Rpb24gbnV0IGFnYWluIGl0IGNhbiBy b3RhdGUgbGVmdCBhbmQgcmlnaHQgYnV0IG5vdCBnbyBiYWNrIHRvIHRoZSBjZW50cmUuIEFueW9u ZSBoYWQgdGhpcyBleHBlcmllbmNlPz4gPiA+ID4gPiBSZWFkIHRoaXMgdG9waWMgb25saW5lIGhl cmU6PiA+IGh0dHA6Ly9mb3J1bXMubWF0cm9uaWNzLmNvbS92aWV3dG9waWMucGhwP3A9NDkwMzcy IzQ5MDM3Mj4gPiA+ID4gPiA+ID4gPiA+ID4gLS0tPiBUaGlzIGVtYWlsIGhhcyBiZWVuIGNoZWNr ZWQgZm9yIHZpcnVzZXMgYnkgQXZhc3QgYW50aXZpcnVzIHNvZnR3YXJlLj4gaHR0cHM6Ly93d3cu YXZhc3QuY29tL2FudGl2aXJ1cz4gPiA+ID4gXy09PT09PT09PT09PT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT1fLT3CoMKgwqDCoMKgwqDCoMKgwqAgLSBU aGUgWWFrLUxpc3QgRW1haWwgRm9ydW0gLV8tPSBVc2UgdGhlIE1hdHJvbmljcyBMaXN0IEZlYXR1 cmVzIE5hdmlnYXRvciB0byBicm93c2VfLT0gdGhlIG1hbnkgTGlzdCB1dGlsaXRpZXMgc3VjaCBh cyBMaXN0IFVuL1N1YnNjcmlwdGlvbixfLT0gQXJjaGl2ZSBTZWFyY2ggJiBEb3dubG9hZCwgNy1E YXkgQnJvd3NlLCBDaGF0LCBGQVEsXy09IFBob3Rvc2hhcmUsIGFuZCBtdWNoIG11Y2ggbW9yZTpf LT1fLT3CoMKgIC0tPiBodHRwOi8vd3d3Lm1hdHJvbmljcy5jb20vTmF2aWdhdG9yP1lhay1MaXN0 Xy09Xy09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09 PT09PT09PT1fLT3CoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgIC0gTUFUUk9OSUNTIFdFQiBG T1JVTVMgLV8tPSBTYW1lIGdyZWF0IGNvbnRlbnQgYWxzbyBhdmFpbGFibGUgdmlhIHRoZSBXZWIg Rm9ydW1zIV8tPV8tPcKgwqAgLS0+IGh0dHA6Ly9mb3J1bXMubWF0cm9uaWNzLmNvbV8tPV8tPT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09 Xy09wqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqAgLSBORVcgTUFUUk9OSUNTIExJU1QgV0lLSSAt Xy09IEFkZCBzb21lIGluZm8gdG8gdGhlIE1hdHJvbmljcyBFbWFpbCBMaXN0IFdpa2khXy09wqDC oCAtLT4gaHR0cDovL3dpa2kubWF0cm9uaWNzLmNvbV8tPT09PT09PT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09Xy09wqDCoMKgwqDCoMKgwqDCoMKg wqDCoMKgIC0gTGlzdCBDb250cmlidXRpb24gV2ViIFNpdGUgLV8tPcKgIFRoYW5rIHlvdSBmb3Ig eW91ciBnZW5lcm91cyBzdXBwb3J0IV8tPcKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKg wqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqAgLU1hdHQgRHJhbGxlLCBMaXN0IEFkbWluLl8tPcKg wqAgLS0+IGh0dHA6Ly93d3cubWF0cm9uaWNzLmNvbS9jb250cmlidXRpb25fLT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PQ= ________________________________ Message 6 _____________________________________ Time: 04:17:35 PM PST US From: Anthony Savarese Subject: Re: Yak-List: Yak 52 Primer issue Very true. Dennis Sent from my iPhone > On Jul 18, 2019, at 4:30 PM, mark bitterlich wrote: > > Unless you own a YAK-50 and then it's reversed! (Hi Dennis!) > > Mark > > -------- Original message -------- > From: Anthony Savarese > Date: 7/18/19 14:07 (GMT-05:00) > To: yak-list@matronics.com > Subject: Re: Yak-List: Yak 52 Primer issue > net> > > Primer left is the system side. Primer right is cylinder side. Up/center i s off. > Dennis > > Sent from my iPhone > > > On Jul 18, 2019, at 12:24 PM, Walter Lannon wrote: > > > > > > Typo in my last - "filed" should read "failed". > > > > Also should have noted there is no fuel pressure indication for the "pri me" operation. > > > > Walt > > > > -----Original Message----- From: ZUDSJ > > Sent: Thursday, July 18, 2019 1:13 AM > > To: yak-list@matronics.com > > Subject: Yak-List: Yak 52 Primer issue > > > > > > Perplexed by the primer and hoping to get some info if possible. Does an yone have a diagram of the Yak 52 primer? > > It was quite tight and when we attempted to prime the system no pressure appeared on the fuel pressure gauge. We loosened the friction nut to the po int that it was removed completely=C3=A2=82=AC=C2 When we put it back i t would prime the system and the cylinder but we could not rotate it to the c entred position. Even though no fuel pressure was showing while priming, the re was fuel going to the cylinders because it flowed out when we opened the m anifold valve at the bottom of the engine. If we tighten the friction nut it does not move at all. When we loosen the friction nut again it can rotate l eft and right but not go back to the centre. Anyone had this experience? > > > > > > > > > > Read this topic online here: > > > > http://forums.matronics.com/viewtopic.php?p=490372#490372 > > > > > > > > > > > > > > > > > > > > --- > > This email has been checked for viruses by Avast antivirus software. > > https://www.avast.com/antivirus > > > > > > > > > > ========================== ========= ========================== ========= ========================== ========= ========================== ========= ========================== ========= > > > ________________________________ Message 7 _____________________________________ Time: 04:31:25 PM PST US Subject: Yak-List: Re: Yak 52 Primer issue From: "ZUDSJ" Thanks guys for your feedback. My question was more around how I could get it back to the centre as somethings stopping that. Could you give me more detail on what I should do with the dowel Walt? I dont understand the mechanics of the primer hence I was looking for a diagram. Thanks guys! Read this topic online here: http://forums.matronics.com/viewtopic.php?p=490409#490409 ________________________________ Message 8 _____________________________________ Time: 04:57:48 PM PST US From: Anthony Savarese Subject: Re: Yak-List: Re: Yak 52 Primer issue If you removed it completel it could be upside down ou youve got the knurled ring to loose and it wont bottom out. Dennis Sent from my iPhone > On Jul 18, 2019, at 6:30 PM, ZUDSJ wrote: > > > Thanks guys for your feedback. My question was more around how I could get it back to the centre as somethings stopping that. Could you give me more detail on what I should do with the dowel Walt? I dont understand the mechanics of the primer hence I was looking for a diagram. Thanks guys! > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=490409#490409 > > > > > > > > > ________________________________ Message 9 _____________________________________ Time: 06:21:30 PM PST US From: Peter Scott Subject: Re: Yak-List: Re: Yak 52 Primer issue When my primer has resisted turning back to centre from cylinder priming, pushing the handle in hard while turning has released it. But I note Anthony's cautionary advice that if plunger has been replaced upside down pushing would not help. if the knurled ring is loose, maybe also? Peter. Peter Scott On Fri, Jul 19, 2019 at 10:07 AM Anthony Savarese < dsavarese0812@bellsouth.net> wrote: > dsavarese0812@bellsouth.net> > > If you removed it completel it could be upside down ou you=99ve got the > knurled ring to loose and it won=99t bottom out. > Dennis > > Sent from my iPhone > > > On Jul 18, 2019, at 6:30 PM, ZUDSJ wrote: > > > > > > Thanks guys for your feedback. My question was more around how I could > get it back to the centre as somethings stopping that. Could you give me > more detail on what I should do with the dowel Walt? I don=99t unde rstand the > mechanics of the primer hence I was looking for a diagram. Thanks guys! > > > > > > > > > > Read this topic online here: > > > > http://forums.matronics.com/viewtopic.php?p=490409#490409 > > > > > > > > > > > > > > > > > > > > =========== =========== =========== =========== =========== > > ________________________________ Message 10 ____________________________________ Time: 09:33:40 PM PST US From: "Walter Lannon" Subject: Re: Yak-List: Re: Yak 52 Primer issue Hi; With the plunger handle in the center position remove the complete plunger assy. Note the position of the slot at the bottom of the plunger relative to the position of the handle. Note the position of the mating tang at the bottom of the primer body. If not in alignment with the plunger slot use the slotted dowel to press downwards and rotate the tang to line up with the plunger slot. Re-install the plunger being careful not to damage the seal. You should be able to feel slot/tang engagement with slight rotation of the handle. Once positively engaged ensure the knurled nut is fully down. Press downwards on the handle and check for proper rotation in each direction. There is the possibility that the slot/tang engagement is perfectly OK but does not operate properly due to the knurled nut being too loose. Check that out first. Walt -----Original Message----- From: ZUDSJ Sent: Thursday, July 18, 2019 4:30 PM Subject: Yak-List: Re: Yak 52 Primer issue Thanks guys for your feedback. My question was more around how I could get it back to the centre as somethings stopping that. Could you give me more detail on what I should do with the dowel Walt? I dont understand the mechanics of the primer hence I was looking for a diagram. Thanks guys! Read this topic online here: http://forums.matronics.com/viewtopic.php?p=490409#490409 --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus ________________________________ Message 11 ____________________________________ Time: 09:52:50 PM PST US From: "Walter Lannon" Subject: Re: Yak-List: Re: Yak 52 Primer issue If you cannot get to the center position remove the plunger where it is. The object is to ensure the the slot & tang are properly engaged throughout the required travel. Walt -----Original Message----- From: ZUDSJ Sent: Thursday, July 18, 2019 4:30 PM Subject: Yak-List: Re: Yak 52 Primer issue Thanks guys for your feedback. My question was more around how I could get it back to the centre as somethings stopping that. Could you give me more detail on what I should do with the dowel Walt? I dont understand the mechanics of the primer hence I was looking for a diagram. Thanks guys! 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