---------------------------------------------------------- Kolb-List Digest Archive --- Total Messages Posted Fri 12/06/19: 5 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 09:41 AM - Re: Re: stock jets for 503 Rotax (Gary Aman) 2. 11:51 AM - Re: Re: stock jets for 503 Rotax (Gary Aman) 3. 04:38 PM - Re: stock jets for 503 Rotax (chic) 4. 04:40 PM - Re: stock jets for 503 Rotax (chic) 5. 10:42 PM - Leaning the carbs for altitude - on the cheap (chic) ________________________________ Message 1 _____________________________________ Time: 09:41:19 AM PST US From: Gary Aman Subject: Re: Kolb-List: Re: stock jets for 503 Rotax I believe the Hacman allows you to move the jet needle into or out of the needle jet to lean or richen the cruise mixture according to the exhaust gas temperature. Most likely around 1100-1200 at cruise but down below 900-1000 at full power Sent from my iPhone > On Dec 5, 2019, at 11:58 AM, chic wrote: > > > OKAY....I pulled the bowls off my carbs and the main jets are 158. I was told that the carbs were rejetted for the 7100 ft altitude of Taos but it appears it was not. What the machine does have is a HACman inflight mixture control installed. That is what they must have meant when I was told it was rejetted. The actual owner of the plane had passed away and I got the info 2nd hand. I have been on the HACman website and this thing looks interesting but still trying to figure out how it works exactly. Don't know if it will really be a benefit to me here in the lower altitudes of SoCal (740ft). Thanks to everyone who supplied info/insight to the carb jetting, I will keep this info as it was helpful! Chic > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=493725#493725 > > > > > > > > > ________________________________ Message 2 _____________________________________ Time: 11:51:22 AM PST US From: Gary Aman Subject: Re: Kolb-List: Re: stock jets for 503 Rotax Just checked out the HACman web site. Latest generation controls bowl pressure to lean or richen mixture. Lots different from a few years back. Better see what you have and then get the manual from HACman Sent from my iPhone > On Dec 5, 2019, at 11:58 AM, chic wrote: > > > OKAY....I pulled the bowls off my carbs and the main jets are 158. I was told that the carbs were rejetted for the 7100 ft altitude of Taos but it appears it was not. What the machine does have is a HACman inflight mixture control installed. That is what they must have meant when I was told it was rejetted. The actual owner of the plane had passed away and I got the info 2nd hand. I have been on the HACman website and this thing looks interesting but still trying to figure out how it works exactly. Don't know if it will really be a benefit to me here in the lower altitudes of SoCal (740ft). Thanks to everyone who supplied info/insight to the carb jetting, I will keep this info as it was helpful! Chic > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=493725#493725 > > > > > > > > > ________________________________ Message 3 _____________________________________ Time: 04:38:02 PM PST US Subject: Kolb-List: Re: stock jets for 503 Rotax From: "chic" It looks like I have the 1st Gen version of the HACman. They all work the same, leaning the mixture of the carbs by float bowl pressure regulation. Here is an article I found on an Avid/kitfox site that explains it and shows how to do the same thing for lots less $$$. http://avidfoxflyers.com/index.php?/topic/5717 called -leaning-the-carbs-for-altitude-on-the-cheap/ >From what I am reading, it doesn't seem to do much for you below 4000ft but above that there is supposedly a notable difference in performance/fuel consumption. Chic Read this topic online here: http://forums.matronics.com/viewtopic.php?p=493733#493733 ________________________________ Message 4 _____________________________________ Time: 04:40:46 PM PST US Subject: Kolb-List: Re: stock jets for 503 Rotax From: "chic" http://avidfoxflyers.com/index.php?/topic/5717-leaning-the-carbs-for-altitude-on-the-cheap/ Sorry, pasted the article wrong....Here it is again! Read this topic online here: http://forums.matronics.com/viewtopic.php?p=493734#493734 ________________________________ Message 5 _____________________________________ Time: 10:42:30 PM PST US Subject: Kolb-List: Leaning the carbs for altitude - on the cheap From: "chic" Interesting article I found and thought I would share! Chic http://avidfoxflyers.com/index.php?/topic/5717-leaning-the-carbs-for-altitude-on-the-cheap/ Read this topic online here: http://forums.matronics.com/viewtopic.php?p=493735#493735 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message kolb-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Kolb-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/kolb-list Browse Digests http://www.matronics.com/digest/kolb-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.