---------------------------------------------------------- Yak-List Digest Archive --- Total Messages Posted Wed 05/09/18: 6 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 02:33 PM - Exhaust loose (fishface68) 2. 03:10 PM - Re: Exhaust loose (doug sapp) 3. 06:25 PM - Chinese rebuild engine (Flibob) 4. 07:29 PM - Re: Chinese rebuild engine (pilotdog57@aol.com) 5. 08:06 PM - Re: Chinese rebuild engine (Lou Dakos) 6. 08:47 PM - Re: Chinese rebuild engine (Walter Lannon) ________________________________ Message 1 _____________________________________ Time: 02:33:04 PM PST US Subject: Yak-List: Exhaust loose From: "fishface68" I am having some issues tightening up the exhaust clamp on No1 cylinder. It was very loose to the point that I thought the C-ring (doughnut) had disintegrated. I got the exhaust segment off without any issues and I have tried reassembling with a new C-Ring but it is still really loose? When i tried to tighten the flange the threaded part started to turn so now I need to re-peen the threaded part to the cylinder. Any advise on how to get it all back together would be much appreciated. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=480001#480001 ________________________________ Message 2 _____________________________________ Time: 03:10:11 PM PST US From: doug sapp Subject: Re: Yak-List: Exhaust loose Yours is a common problem caused by the steel exhaust donuts rattling around causing the aluminum exhaust port to "bell" out. Not much can be done other than welding and machining or replace the cylinder, the latter may be the lowest cost fix.. Exhaust ring nuts should be snugged up at every conditional inspection. Doug On Wed, May 9, 2018 at 2:32 PM, fishface68 wrote: > > I am having some issues tightening up the exhaust clamp on No1 cylinder. > It was very loose to the point that I thought the C-ring (doughnut) had > disintegrated. I got the exhaust segment off without any issues and I have > tried reassembling with a new C-Ring but it is still really loose? When i > tried to tighten the flange the threaded part started to turn so now I need > to re-peen the threaded part to the cylinder. Any advise on how to get it > all back together would be much appreciated. > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=480001#480001 > > ________________________________ Message 3 _____________________________________ Time: 06:25:54 PM PST US Subject: Yak-List: Chinese rebuild engine From: "Flibob" I just got through replacing my 1400 hour Hosai engine. Old engine ran good but new engine just sitting in the back of hangar didn't make sense. Got it installed now for the run in. Chinese Manuel just says install engine. I assume all stops are correctly set so cables and levers should be adjusted. On the first start seemed that a mag was off. Will run with start button and pumping on primer. But, stops when button is released or prime stops. Any ideas. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=480008#480008 ________________________________ Message 4 _____________________________________ Time: 07:29:06 PM PST US From: pilotdog57@aol.com Subject: Re: Yak-List: Chinese rebuild engine Check for preserving packing material inside the carburetor. Sent from my iPad > On May 9, 2018, at 6:25 PM, Flibob wrote: > > > I just got through replacing my 1400 hour Hosai engine. Old engine ran good but new engine just sitting in the back of hangar didn't make sense. > > Got it installed now for the run in. Chinese Manuel just says install engine. I assume all stops are correctly set so cables and levers should be adjusted. On the first start seemed that a mag was off. Will run with start button and pumping on primer. But, stops when button is released or prime stops. Any ideas. > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=480008#480008 > > > > > > > > > ________________________________ Message 5 _____________________________________ Time: 08:06:48 PM PST US From: "Lou Dakos" Subject: RE: Yak-List: Chinese rebuild engine Have a look inside carbie for a little cap over jet. -----Original Message----- From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Flibob Sent: Thursday, 10 May 2018 11:26 AM Subject: Yak-List: Chinese rebuild engine I just got through replacing my 1400 hour Hosai engine. Old engine ran good but new engine just sitting in the back of hangar didn't make sense. Got it installed now for the run in. Chinese Manuel just says install engine. I assume all stops are correctly set so cables and levers should be adjusted. On the first start seemed that a mag was off. Will run with start button and pumping on primer. But, stops when button is released or prime stops. Any ideas. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=480008#480008 ________________________________ Message 6 _____________________________________ Time: 08:47:18 PM PST US From: "Walter Lannon" Subject: Re: Yak-List: Chinese rebuild engine The Chinese do not say "just install the engine" Did you follow the manual de-inhibiting process? What you describe is probably a non functioning carburettor. Two items here: 1. Carb is full of inhibiting oil and/or: 2. They sometimes put a protective "condom" over the ambient pressure sensing tube in the carb throat. With item 1. only it will start eventually and run like a shit box. With item 2 it will never start. In addition they also usually protect the magneto points with a small piece of oiled paper or cloth between the points. These have to be removed and the points thoroughly cleaned of oil. Walt -----Original Message----- From: Flibob Sent: Wednesday, May 09, 2018 6:25 PM Subject: Yak-List: Chinese rebuild engine I just got through replacing my 1400 hour Hosai engine. Old engine ran good but new engine just sitting in the back of hangar didn't make sense. Got it installed now for the run in. Chinese Manuel just says install engine. I assume all stops are correctly set so cables and levers should be adjusted. On the first start seemed that a mag was off. Will run with start button and pumping on primer. But, stops when button is released or prime stops. Any ideas. 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