McFarlane Aviation Products

Part Number: MCM83248/1-012

O-RING

Eligibility Notice

Please verify that this product is eligible for your aircraft before adding it to your cart.

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Approval	FAA-PMA
Condition	New
Manufacturer	McFarlane Aviation, Inc.
Unit of Measure	Each
Retail Price	$0.67
Your Price	$0.63
Stock Status	In Stock

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Product Details

The MCM83248 series o-rings are fuel proof FAA-PMA replacement o-rings. Only McFarlane has FAA approval to replace the old, less fuel resistant nitrile (MS series) and synthetic rubber (NAS series) o-rings with the latest fuel proof fluorocarbon o-rings! Flurocarbon rubber is commonly known as Viton. It is an advanced rubber that has extremely good fuel and heat resistance and is ideally suited for aircraft fuel system applications.

If you are looking for standard non FAA-PMA M83248 series o-rings, go to O-Rings and Gaskets.

McFarlane also has complete fuel selector, fuel shut off valve, and fuel strainer seal kits with all required seals and gaskets. Go to Fuel Selector/Shut-Off Valve Seal Kits or Fuel Strainer Parts to find the kit for your aircraft.

Supersedures

Eligibility Notice

Please verify that this product is eligible for your aircraft before adding it to your cart.

Click here to view product eligibility.

OEM Part Number	McFarlane Part Number	Comment
AF934-7	MCM83248/1-012
MS29513-012	MCM83248/1-012
MS29513-12	MCM83248/1-012
NAS1593-012	MCM83248/1-012

Related Categories

Eligible Aircraft

Make	Series	Model	Beginning S/N	Ending S/N	Quantity Per Aircraft	Location	Eligibility Chart
Cessna	170	170B	20286	27169		fuel valve	1610
Cessna	172	172	28000	46754	1	fuel valve	1610
Cessna	172	172A	46755	47746	1	fuel valve	1610
Cessna	172	172B	17247747	17248734	1	fuel valve	1610
Cessna	172	172C	17248735	17249544	1	fuel valve	1610
Cessna	172	172D	17249545	17250572	1	fuel valve	1610
Cessna	172	172E	17250573	17251822	1	fuel valve	1610
Cessna	172	172F (T-41A)	17251823	17253392	1	fuel valve	1610
Cessna	172	172G	17253393	17254892	1	fuel valve	1610
Cessna	172	172H (T-41A)	17254893	17256512	1	fuel valve	1610
Cessna	172	172I	17256513	17257161	1	fuel valve	1610
Cessna	172	172K	17257162	17259223		fuel valve	1610
Cessna	172	172L	17259224	17260758	1	fuel valve	1610
Cessna	172	172M	17260759	17263458		fuel valve	1610
Cessna	172	172M	17263459	17267584		fuel valve	1610
Cessna	172	172N	17267585	17274009		fuel valve	1610
Cessna	172	172P	17274010	17276654		fuel valve	1610
Cessna	172	172Q	17275869	17276211		fuel valve	1610
Cessna	172	172R	17280001	17299999	1	fuel valve	1610
Cessna	172	172RG	172RG0001	172RG1191		fuel valve	1610
Cessna	172	172S	172S8001	172S99999	1	fuel valve	1610
Cessna	172	F172D	F172-0001	F172-0018		fuel valve	1610
Cessna	172	F172E	F172-0019	F172-0085		fuel valve	1610
Cessna	172	F172F	F172-0086	F172-0179		fuel valve	1610
Cessna	172	F172G	F172-0180	F172-0319		fuel valve	1610
Cessna	172	F172H	F17200655	F17200754	1	fuel valve	1610
Cessna	172	F172H	F172-0320	F172-0654		fuel valve	1610
Cessna	172	F172K	F17200755	F17200804	1	fuel valve	1610
Cessna	172	F172L	F17200805	F17200904	1	fuel valve	1610
Cessna	172	F172M	F17200905	F17201234		fuel valve	1610
Cessna	172	F172M	F17201235	F17201514		fuel valve	1610
Cessna	172	F172N	F17201515	F17202039		fuel valve	1610
Cessna	172	F172P	F17202040	ZZZZZZZZZZZZZZZ		fuel valve	1610
Cessna	172	FP172	FP172-0001	FP172-0003	1	fuel valve	1610
Cessna	172	FR172E	FR17200001	FR17200060	1	fuel valve	1610
Cessna	172	FR172F	FR17200061	FR17200145	1	fuel valve	1610
Cessna	172	FR172G	FR17200146	FR17200225	1	fuel valve	1610
Cessna	172	FR172H	FR17200226	FR17200350	2	fuel valve	1610
Cessna	172	FR172J	FR17200351	FR17200590	1	fuel valve	1610
Cessna	172	FR172K	FR17200591	FR17200675	1	fuel valve	1610
Cessna	172	P172D	P17257120	P17257188	1	fuel valve	1610
Cessna	172	R172K	R1722000	R1723454	1	fuel valve	1610
Cessna	175	175	55001	56238		fuel valve	1610
Cessna	175	175A	56239	56777		fuel valve	1610
Cessna	175	175B	17556778	17557002		fuel valve	1610
Cessna	175	175C	17557003	17557119		fuel valve	1610
Cessna	177	177	17700001	17701164	1	fuel valve	1610
Cessna	177	177A	17701165	17701370	1	fuel valve	1610
Cessna	177	177B	17701371	17702752	1	fuel valve	1610
Cessna	177	177RG	177RG0283	177RG1051		fuel valve	1610
Cessna	177	177RG	177RG1052	177RG1366		fuel valve	1610
Cessna	177	F177RG	F177RG0063	F177RG0160	1	fuel valve	1610
Cessna	177	F177RG	F177RG0161	F177RG0177		fuel valve	1610
Cessna	180	180K	18052771	18053203		fuel valve	1610
Cessna	182	182E	18253599	18254423	1	fuel valve	1610
Cessna	182	182F	18254424	18255058	1	fuel valve	1610
Cessna	182	182G	18255059	18255844	1	fuel valve	1610
Cessna	182	182H	18255846	18256684	1	fuel valve	1610
Cessna	182	182J	18256685	18257625	1	fuel valve	1610
Cessna	182	182K	18257626	18258505	1	fuel valve	1610
Cessna	182	182L	18258506	18259305		fuel valve	1610
Cessna	182	182M	18259306	18260055	1	fuel valve	1610
Cessna	182	182N	18260056	18260825	1	fuel valve	1610
Cessna	182	182P	18260826	18262465	1	fuel valve	1610
Cessna	182	182Q	18265176	18267715		fuel valve	1610
Cessna	182	182R	18267716	18268586		fuel valve	1610
Cessna	182	182S	18280001	18280944		fuel valve	1610
Cessna	182	182T	18280945	182999999		fuel valve	1610
Cessna	182	A182J	A182-0001	A182-0056	1	fuel valve	1610
Cessna	182	A182K	A182-0057	A182-0096	1	fuel valve	1610
Cessna	182	A182L	A182-0097	A182-0116	1	fuel valve	1610
Cessna	182	A182N	A182-0117	A182-0146	1	fuel valve	1610
Cessna	182	F182P	F18200001	F18200025		fuel valve	1610
Cessna	182	F182Q	F18200026	F18200169		fuel valve	1610
Cessna	182	FR182	0	ZZZZZZZZZZZZZZZ		fuel valve	1610
Cessna	182	R182	R18200001	R18202041		fuel valve	1610
Cessna	182	T182	18267716	18268541		fuel valve	1610
Cessna	182	T182T	T18208001	T182999999		fuel valve	1610
Cessna	182	TR182	R18200584	R18202041		fuel valve	1610
Cessna	185	185B	185-0513	185-0653		fuel valve	1610
Cessna	185	185C	185-0654	185-0776	1	fuel valve	1610
Cessna	185	185D	185-0777	185-0967	1	fuel valve	1610
Cessna	185	185E	185-0968	185-1149	1	fuel valve	1610
Cessna	185	A185E	18501600	18502090	1	fuel valve	1610
Cessna	185	A185E	185-1150	185-1599	1	fuel valve	1610
Cessna	185	A185F	18503154	18504448		fuel valve	1610
Cessna	205	210-5 (205)	205-0001	205-0480		fuel valve	1610
Cessna	205	210-5A (205A)	205-0481	205-0550		fuel valve	1610
Cessna	205	210-5A (205A)	205-0552	205-0555	1	fuel valve	1610
Cessna	210	210	57001	57575		fuel valve	1610
Cessna	210	210A	21057576	21057840		fuel valve	1610
Cessna	210	210B	21057841	21058085		fuel valve	1610
Cessna	210	210C	21058086	21058220		fuel valve	1610
Cessna	210	210D	21058221	21058325		fuel valve	1610
Cessna	210	210D	21058327	21058351		fuel valve	1610
Cessna	210	210N	21064536	21064897		fuel valve	1610
Cessna	210	210R	21064898	21065009		fuel valve	1610
Cessna	210	P210N	P21000761	P21000834		fuel valve	1610
Cessna	210	P210R	P21000835	P21000874		fuel valve	1610
Cessna	210	T210N	21064536	21064897		fuel valve	1610
Cessna	210	T210R	21064898	21065009		fuel valve	1610
Cessna	310	310F	310-0001	310-0156		fuel valve	1610
Cessna	310	310G	310G0001	310G0156		fuel valve	1610
Cessna	310	310H	310H0001	310H0148		fuel valve	1610
Cessna	310	310I	310I0001	310I0200		fuel valve	1610
Cessna	310	310J	310J0001	310J0200		fuel valve	1610
Cessna	310	310J-1	310J0001	310J0200		fuel valve	1610
Cessna	310	310K	310K0001	310K0245		fuel valve	1610
Cessna	320	320	320-0001	320-0110		fuel valve	1610
Cessna	320	320-1	320-0001	320-0110		fuel valve	1610
Cessna	320	320A	320A0001	320A0047		fuel valve	1610
Cessna	320	320B	320B0001	320B0062		fuel valve	1610
Cessna	320	320C	320C0001	320C0073		fuel valve	1610
Cessna	320	320D	320D0001	320D0130		fuel valve	1610

Frequently Asked Questions

Question
Should I use a sealer or lubrication for my Viton gaskets? The Viton gasket and screw seals do not require any sealer and must not have any lubricants. Do not over tighten the attachment screws as over tightening can extrude the gasket out from under the transmitter and tear the gasket in the screw holes. This will cause a leak. Tighten the screws evenly until you see the gasket just start to extrude a little. Any lubrication will aggravate the tearing of the gasket.
How do I keep contaminants out of my fuel system? The fuel selector valve works in unscreened fuel. Contaminated fuel can cause selector valve seal damage. When fueling from possibly contaminated fuel sources McFarlane recommends the use of a fuel filter, such as Mr. Funnel or another filtering device, to reduce trash in the fuel system.
What pressure is used to test the fuel selector valves after repairs? We pressure test our repaired valves to a minimum of 5 psi using precision controlled air pressure and a calibrated low pressure indicator. This pressure is above the normal fuel pressure on the valve and below the limits of the springs in the valve. Each valve is submerged in Stoddard solvent while the air pressure is applied to the valve. The valves are then tested in each position to assure that there are no inter-port or external leaks. Leaks are detected by looking for air bubbles escaping from the valve.
How do I know when to replace or service my fuel selector valve? The most common indication of external fuel valve leaks is the smell of avgas in the cabin. Most valves are located under the cabin floor. Fuel stain on the valve and drain plug or drain valve or on the belly of the aircraft can also indicate external leakage. External leaks are generally around the actuation valve stem. Internal leaks are detected when the fuel is turned off and fuel continues to drip during fuel system maintenance. Inner port leakage will allow fuel from one tank to leak into another fuel tank. This type leak is difficult to detect. Fuel transfer from one tank to another with the fuel valve selected to one tank only will indicate inner-port leakage. An extended period of time is needed to detect fuel transfer from one tank to another. Generally if internal leakage is detected when servicing the fuel system, it is likely there is also inner-port leakage.