3300 low power ? - Zenith Aircraft Builders and Flyers2024-03-28T14:33:53Zhttps://zenith.aero/forum/topics/3300?commentId=2606393%3AComment%3A813201&feed=yes&xn_auth=noI just read through this long…tag:zenith.aero,2022-05-23:2606393:Comment:8698732022-05-23T18:51:50.323ZDan Dempseyhttps://zenith.aero/profile/DanDempsey
<p>I just read through this long thread. I had the opposite problem after installing the Gen 4 3300. My RPM were going to near 3500 as indicated by my Tach. This wound up being a problem with the Tach settings. Once fixed it showed 2850 static/full power. It occurs to me you could have the same problem, Tach reading wrong because not set up correctly.</p>
<p>I just read through this long thread. I had the opposite problem after installing the Gen 4 3300. My RPM were going to near 3500 as indicated by my Tach. This wound up being a problem with the Tach settings. Once fixed it showed 2850 static/full power. It occurs to me you could have the same problem, Tach reading wrong because not set up correctly.</p> I fought this problem a few y…tag:zenith.aero,2022-05-09:2606393:Comment:8690602022-05-09T01:11:22.358ZJerry Griegohttps://zenith.aero/profile/JerryGriego
<p>I fought this problem a few years back, I could take the carb apart with my eyes closed. I broke down and bought a new carb. and used the jetting that was recommended from Bing. All my problems went away. One more thing check that there is nothing inside the muffler restricting exhaust from full flow. I also found this problem with a scope camera. I found the obstruction before I bought the Carb.</p>
<p>I fought this problem a few years back, I could take the carb apart with my eyes closed. I broke down and bought a new carb. and used the jetting that was recommended from Bing. All my problems went away. One more thing check that there is nothing inside the muffler restricting exhaust from full flow. I also found this problem with a scope camera. I found the obstruction before I bought the Carb.</p> I scanned thru the voluminous…tag:zenith.aero,2022-03-12:2606393:Comment:8638632022-03-12T23:16:45.980ZWarren B Peckhttps://zenith.aero/profile/WarrenBPeck
<p>I scanned thru the voluminous suggestions and didn't see this one. When you push your throttle to wide open, is there at least an 1/8th of an inch of throttle cable left when the carb is at WOT? If not, maybe you're not actually at WOT? js.</p>
<p></p>
<p>I scanned thru the voluminous suggestions and didn't see this one. When you push your throttle to wide open, is there at least an 1/8th of an inch of throttle cable left when the carb is at WOT? If not, maybe you're not actually at WOT? js.</p>
<p></p> You are welcome Darrell! So g…tag:zenith.aero,2021-04-25:2606393:Comment:8335492021-04-25T01:06:27.046ZDon Burkholderhttps://zenith.aero/profile/DonBurkholder
<p>You are welcome Darrell! So glad to hear this. The Bing is actually a very fine mixer of fuel and air!</p>
<p>You are welcome Darrell! So glad to hear this. The Bing is actually a very fine mixer of fuel and air!</p> Don,
I wanted to let you know…tag:zenith.aero,2021-04-07:2606393:Comment:8313942021-04-07T11:16:47.278ZDarrell Doerhoffhttps://zenith.aero/profile/DarrellDoerhoff
<p>Don,</p>
<p>I wanted to let you know that I put the washer back in. Yesterday, I was finally able to get the plane out, gave it a good test run, and the engine ran great! The temps all looked good, too, with no alarms! Thanks for your advice.</p>
<p>Don,</p>
<p>I wanted to let you know that I put the washer back in. Yesterday, I was finally able to get the plane out, gave it a good test run, and the engine ran great! The temps all looked good, too, with no alarms! Thanks for your advice.</p> HiHo,
thank you for the reply…tag:zenith.aero,2021-04-03:2606393:Comment:8310742021-04-03T20:12:24.983ZSteffen Glatzhttps://zenith.aero/profile/SteffeGlatz
<p>HiHo,</p>
<p>thank you for the reply, Measuring the pressure for leakage ist the next step.</p>
<p>It is an unused but new-old engine, about 12 years in the box and now has about 20h running time.</p>
<p>I re evaluated the air intake side and fuel side now completely and changed a lot.</p>
<p>But still max rpm 2500 even running the plane 80-90 kph on the runway.</p>
<p>HiHo,</p>
<p>thank you for the reply, Measuring the pressure for leakage ist the next step.</p>
<p>It is an unused but new-old engine, about 12 years in the box and now has about 20h running time.</p>
<p>I re evaluated the air intake side and fuel side now completely and changed a lot.</p>
<p>But still max rpm 2500 even running the plane 80-90 kph on the runway.</p> If I recall correctly that at…tag:zenith.aero,2021-03-14:2606393:Comment:8284452021-03-14T20:14:37.913ZRalph Sansonhttps://zenith.aero/profile/RalphSanson
<p>If I recall correctly that atomiser can be replaced upside down - something else to check</p>
<p>If I recall correctly that atomiser can be replaced upside down - something else to check</p> Hi Steffen You really have ha…tag:zenith.aero,2021-03-06:2606393:Comment:8275292021-03-06T10:07:45.166ZSven-Åke Svenssonhttps://zenith.aero/profile/SvenAAkeSvensson
<p>Hi Steffen<br></br> You really have had more than enough problems.<br></br> I don´t know if you have an old used or a completely new engine. But I think you have to start with very basic investigations. <br></br> I would start with Leak down test, to be sure you have no leaks in valves or cylinders. <br></br> Check all sparkplugs and wires. <br></br> Measure the resistance in all ignition wires.<br></br> Are the ignition timing up to spec? My guess around 25 deg BTDC.<br></br> Inlet manifold, look for leaks, can you…</p>
<p>Hi Steffen<br/> You really have had more than enough problems.<br/> I don´t know if you have an old used or a completely new engine. But I think you have to start with very basic investigations. <br/> I would start with Leak down test, to be sure you have no leaks in valves or cylinders. <br/> Check all sparkplugs and wires. <br/> Measure the resistance in all ignition wires.<br/> Are the ignition timing up to spec? My guess around 25 deg BTDC.<br/> Inlet manifold, look for leaks, can you see any damaged gaskets or not connected vacuum hose?<br/> If MAP and static press (at wide open throttle) are close there are no restrictions. <br/> Is temperature OAT and inside air box close to equal, no problem.<br/> Air-fuel ratio, you can use CHT and Exhaust temp, to see difference between cylinders. <br/> But to identify too lean or rich it is better to check with a Lambda instrument.<br/> I use an Innovate MTX, low price- good quality. Guess you can buy the kit for 200 EUR. Bosch 4.9 sensor included.<br/> Lambda values, at takeoff 0,92-0,94 (rich) and at level flight close to 1,00 (normal). Above 1,05 far too lean.<br/> If you use an EFIS, the logfile can help you to understand more, if all temperatures seem to be all right, oil and fuel pressure are up to spec. Rpm and MAP that works together.<br/><br/></p> What are the exhaust temperat…tag:zenith.aero,2021-03-01:2606393:Comment:8262272021-03-01T22:09:37.065ZDon Burkholderhttps://zenith.aero/profile/DonBurkholder
<p>What are the exhaust temperatures?</p>
<p>In your photos of the main jet, jet carrier, needle jet... Where is the atomizer as pictured below?</p>
<p><img src="https://www.officine08.it/cache/prodotti/2020/09/22/80311/big_80311-valvola-gas-carburatore-per-bmw-r-80-r-copia.jpg" alt="Carburetor Bing pre atomizer"/></p>
<p>What are the exhaust temperatures?</p>
<p>In your photos of the main jet, jet carrier, needle jet... Where is the atomizer as pictured below?</p>
<p><img src="https://www.officine08.it/cache/prodotti/2020/09/22/80311/big_80311-valvola-gas-carburatore-per-bmw-r-80-r-copia.jpg" alt="Carburetor Bing pre atomizer"/></p> So, the whole Saturday and Su…tag:zenith.aero,2021-02-21:2606393:Comment:8214762021-02-21T17:07:12.641ZSteffen Glatzhttps://zenith.aero/profile/SteffeGlatz
<p>So, the whole Saturday and Sunday screwed on the plane, while the others flew in perfect sunshine. <br></br>Now I am with my Latin at the end and rather desperate. <br></br>The Bing carburetor was disassembled cleaned and all seals renewed.<br></br>The gasoline supply is tested and more than sufficient.<br></br>The gasoline is fresh from the gas station.<br></br>The engine has fresh oil and a new oil filter.<br></br>BUT with the 12 degree propeller it still only makes 2200 rpm.<br></br>I changed to the 11 degree helix…</p>
<p>So, the whole Saturday and Sunday screwed on the plane, while the others flew in perfect sunshine. <br/>Now I am with my Latin at the end and rather desperate. <br/>The Bing carburetor was disassembled cleaned and all seals renewed.<br/>The gasoline supply is tested and more than sufficient.<br/>The gasoline is fresh from the gas station.<br/>The engine has fresh oil and a new oil filter.<br/>BUT with the 12 degree propeller it still only makes 2200 rpm.<br/>I changed to the 11 degree helix propeller and get just 2400 rpm.<br/>The test runs on the ground were with open air intake without filter. I used a scope to observe the air intake and the vacuum can in the Bing carburetor opens the airflow at full throttle completely correctly.<br/>It does not change the RPM if the second electric fuel pump is engaged.<br/>What can be the problem? What else can I check?<br/>Can it be a problem internal to the engine with too much friction ?<br/>Who else has an idea for me ?<br/>Thanks to all.</p>
<p></p>
<p></p>