Part# 641534
MFR Model# 150 BOX


Not FAA Approved

Fits Cessna 120, 150, 140, and PA-22 Tripacer. Order filter, gaskets, studs & pins separately.
California Prop 65 Warning Symbol

WARNING: The product may contain and/or expose you to a chemical(s) or substance(s) which are known to the State of California to cause cancer and/or birth defects or other reproductive harm.


I have not installed yet (waiting on the engine) but it looks like good quality.

James M Verified Purchase


October 18, 2022

Paul F Verified Purchase


November 27, 2021

Great product!

H. S Verified Purchase


August 18, 2021

The spitting image of the one on my 150M except new (and not full of repairs.)

Chinookflight L
April 7, 2021

Precise, fast shipping! From grounded to flying in three days.

October 8, 2020

Unit was a good fit on MA3-SPA carb on my Corvair-powered Sonex. Its low profile enabled simplification and streamlining of the cowl installation. I am pleased. It would have been nice if it shipped with a gasket between it and the carb.

Arthur P
May 2, 2020

Good value for the dollar. Had to make some minor adjustments to fit my Citabria but all in all, very happy.

Dave C
November 14, 2018

Great Box for the price you pay. However be prepared to drill couple holes for the bracket and like mentioned you may need to widen the hole slightly for the cable. For the price its decent quality and will give years of trouble free. I have installed this exact box back in 2007. No issues.

Jared C
August 27, 2018

Great quality. The only negative is that I had to drill two holes for a support bracket, one hole for the cotter pin to go through on the hose, and widen the hole for the cable bolt to go through.

Wesley K
May 25, 2017

The body is very thin material. The lever arm is even thinner. I dont expect it to last long before cracking. Nutplates were not centered in the holes or or flanges.

Micheal W
February 4, 2021


Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: Does this part # 641534 fit a MA3-SPA carb?

Yes, it will fit that carb.

Q: What is the height of the Carb Heat box? What are all the other dimensions?

From bottom of box to the top of the mounting flange is approx. 3-1/8", box is 3-3/4" wide, approx. 5-1/2" long not including the angled air filter section of the unit.

Q: What is the distance between the holes in the mounting flange (center to center)?

Approx 2-1/2" from center to center.

Q: Is this FAA approved for the Cessna 140?

This product is not FAA Approved. The manufacturer can make these for the Cessna 140. Please contact our sales department for price and lead time on the special order box.

Q: Does this box come with the studs to mount onto a Marvel Schebler MA-3SPA Carburetor? I just bought a brand new carb from you guys but need the studs!

No the studs are not included with this airbox.

Q: Im building from scratch a air induction and carb heat system. Could you recommend an air filter assembly?

The filter is not included with this unit. Use filter p/n: 08-01542.

Q: Is there a Left Hand and a Right Hand? I would like the lever on the right side of the engine, the present box has the lever on the left side.

They can be special ordered this way for a fee. Please contact our sales department for a special quote.

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