n963wb(at)frontiernet.net
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 Posted: Sat Feb 03, 2007 12:59 pm Post subject: electric carb heater |
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Greetings all,
Someone asked about carb heat for a 912 and someone else mentioned the resistive unit for a Jabiru. I also just received this heater for my Jab and ran some preliminary tests to determine current draw and will also pass along the dimensions. It is cylindrical, 30 mm in diameter and 30 mm tall, weighing 70 grams. Attachment is with two bolts to the side of the carb using the included taps. There are two electrical connections using the body of the cylinder for ground. The two coils can be operated independently which allows for a high and low setting. When the unit is cold the resistance of each coil is 8.6 Ohms for a current draw of 3.5 Amps. As the temperature increases the impedance rapidly decreases to 4.7 Ohms, however, the current draw dropped to 2.0 Amps. Cold current drain on high results in a rather high figure of 7 amps but tapers off a bit after it heats up. The kit was very complete with switches, a chunk of wire, fuse holder and all necessary electrical connectors. I was disappointed with the two SPST switches. I have already replaced them with a DPDT so as to only take up one of my switch locations.
The current drain of two units operating on high for the 912 might put a bit of a strain on the electrical system.
Hope this is useful
Dick Neitzel
Sayner, WI
701 Jab 2200
N963WB
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