Carb Synchronizer Gauge Kit

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Part# 15-05098
MFR Model# 33700


Carb Synchronizer Kit:
Use this matching gauge set to calibrate any engine with multiple carburetors. Each oversize 3.5 gauge reads from +10 psi to -30 psi. Gauges are marked in either psi or cm hg. Includes a variety of valves and fittings to fit most any engine.
For Rotax 912
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WARNING: Cancer and Reproductive Harm -


In The Box

  • Compact line shut off
  • Pulse line 7606
  • 3/8" Circle clamps
  • Fuel pump and vacuum tester
  • 4mm Bungee cord
  • Carb sync assy instruction sheet
  • Carb sync 4x6 wood panel
  • Frequently Purchased With
  • Customers Also Viewed


These are good quality pressure/vacuum gauges. The printed instruction manual is only barely legible. I had to come back to this web page to download the PDF to get a usable copy. The PDF is in bad shape. It is a low quality noisy blurred scan of old documents. You might want to download it and make sure you can read and understand all of it before spending money on the kit. Aircraft Spruce does good work. This is a surprise.

August 14, 2018

placed order December 10, 2019, notified via e-mail of a back order and expect to re-stock by Dec 18, 2109. I made two separate phone calls in early Jan to request status. It appeared that the order got pushed into an inactive file. Finally after my last call, your people contacted the vendor and had the order shipped and finally received it on Jan 16, 2020. Thank goodness I was not in a hurry. I dont consider this as the Spruce norm.

Robert E
January 20, 2020


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: Will this CARB SYNCHRONIZER GAUGE KIT work on my 503 Rotax with dual Bing 54 carbs?

Yes, this kit will work on any dual carb engine. Some of the adapters that are included will not be necessary, but it will work fine.

Q: Are the gauges oil filled or dampened? Is there an adjustable valve?

These are not oil filled. The kit includes 2 dampening valves that need to be used to get rid of vibrations.

Q: Will these gauges connect to the 912ULS with the included parts?

This tool will work with a Rotax with Bing carbs.

Q: Will this carb synch device work for 912s rotax engine?

Yes this will work with the carbs on a Rotax 912.

Q: will this work to sync carbs on an outboard boat motor?

We do not have any data showing this for marine use. We can only supply information for aviation use.

Q: Are the gauges calibrated?

No they are not.