These images were taken from a Cessna 150 aircraft containing a Continental O-200 engine.
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2$\begingroup$ Related, in case you don't have all answers: C150 service manual. After 1976, this one. $\endgroup$– minsCommented Dec 24, 2016 at 13:14
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1$\begingroup$ Are you the pilot, owner or mechanic? $\endgroup$– vasin1987Commented Dec 24, 2016 at 13:52
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3 Answers
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1 - nutplate holding something on the other side of the firewall
2 - starter or master contactor (a relay operated by low-current signal from cockpit switch)
4 - positive heavy-gauge cable to battery or starter
5 and 6 might be the alternator voltage regulator to hold the output voltage at 14.4V
10 - oil filter to remove carbon and other crud from oil
11 and 23 - magneto to provide carefully-timed high voltage pulses at for ignition
12 - alternator to charge battery and run electric instruments / radios
14 - vacuum pump to power gyroscopic flight instruments
15 - carburetor to meter air and fuel
21 - crankcase vent (?) to prevent blow-by gases from forcing oil out of the engine
22 - fuel strainer drain valve to drain water / crud from low point in fuel system
Better pictures would help to identify the other parts!
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$\begingroup$ Are you sure it's a 12v (14.4) system and not a 28v one? $\endgroup$ Commented Dec 24, 2016 at 14:59
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1$\begingroup$ @RonBeyer C150s have 12V systems by design. I suppose someone could change out of r a 28V system if they really wanted to. $\endgroup$– J WCommented Dec 24, 2016 at 15:02
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$\begingroup$ I believe 2 is specifically the starter solenoid. I believe the master solenoid is below the battery box. $\endgroup$– J WCommented Dec 24, 2016 at 16:16
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1 - nutplate holding something on the other side of the firewall
2 - starter or master contactor (a relay operated by low-current signal from cockpit switch)
4 - positive heavy-gauge cable to battery or starter
5 and 6 might be the alternator voltage regulator to hold the output voltage at 14.4V
10 - oil filter to remove carbon and other crud from oil
11 and 23 - magneto to provide carefully-timed high voltage pulses at for ignition
12 - alternator to charge battery and run electric instruments / radios
14 - vacuum pump to power gyroscopic flight instruments
15 - carburetor to meter air and fuel
21 - crankcase vent (?) to prevent blow-by gases from forcing oil out of the engine
22 - fuel strainer drain valve to drain water / crud from low point in fuel system
And to fill in the missing items:
3 - Rubber nipple protecting the energize conductor for the item 1 contactor
6 - Over voltage sensor (shuts off alternator if voltage is too high)
7 - Vacuum hose to cockpit (feeds air powered instruments)
8 - Avionics cooling duct inlet.
9 - static pressure port.
13 - left side exhaust muffler / cabin heat exchanger.
16 - Induction air filter
17 - Induction air box including carb heat valve.
18 - Engine data plate.
19 - Spark plug.
20 - Air inlet for cabin heat system.
23 - Right magneto.
24 - Oil filler cap.
25 - Rubber nipple protecting battery positive wire terminal.
26 - Battery box.
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- 8 may be the AC system intake
9 is the static port for the pressure-based instruments
15 looks like a fuse box
18 is the engine information plate
- 19 is a spark plug
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$\begingroup$ What kind of Cessna 150 has air conditioning? Probably just cabin air intake $\endgroup$ Commented Dec 24, 2016 at 14:44
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$\begingroup$ 8 is an avionics vent intake; 15 is the Carburetor; 18 is more properly called the engine data plate; $\endgroup$– J WCommented Dec 24, 2016 at 16:07