Mastertech logo  Used parts link
Bulletin Board

to get great parts for your outboard?

Right Here!


A Fun Old Porcelain Sign and Ancient Tools

Sign Reads "Wanted: Good Woman Must Be Able To Clean, Cook, Sew,  Dig Worms, and Clean Fish.  Must Have Boat and Motor. Please Send Picture of Boat and Motor.


Meet the MasterTech!
(click picture)

Bill the Master Tech


If your supplier says:

That motor's 7 years old.
Part is no longer available.
We lose $$ on service!
EPA made me do it!
Parts at central warehouse, you'll get them next month.
We don't make parts for those.
We only do warranty work.
Our techs only fix late models.
No clue what's wrong! So we'll work time & material.


the Mastertech!




PayPal acceptedCredit cards accepted
In Your Cart:




This tachometer was developed with suggestions received from all facets of the industry; manufacturers, service dealers, field personnel, etc. As a result, Electronic Specialties developed the most versatile engine test tachometer available.

The Model 321 incorporates wireless capability as well as interchangeable inductive and capacitive secondary clamp on pickups. The wireless feature provides for quick RPM checks and readings where secondary spark plug wires are inaccessible. The inductive pick-up provides noise free, accurate tachometer readings with (1200oF), heat protected leads of up to twenty feet. The capacitive clip on pick-up allows for hands free engine adjustment where secondary wires are too short to allow entry of an inductive pick-up.

Selector switches allow for direct readings of (4) and (2) cycle engines firing up to three times per revolution. As a result you'll see true RPM readings, regardless of multiple firings per engine revolution. RPM's may be viewed in ranges from 1 to 10,000 in 10 RPM increments, and from 1 to 20,000 in 100 RPM increments.

An RPM hold switch captures and holds the maximum engine speed, if desired, until re-set. A spark indicator LED indicates presence of secondary coil output and will detect misfire. Auto shut-off will occur two minutes after spark input ceases.

Unit comes with one-year warranty. Inductive pick-up included. Capacitive pick-up, carrying case, 10 foot inductive pick-up and 20 foot inductive pick-up are optional equipment.

Test Ranges:   Engines Tested:
0-10,000 RPM   4 cycle
0-20,000 RPM   2 cycle (4 cycle or DIS)
    2 cycle (2X firing)
    2 cycle (3X firing)
Other Features:
Peak RPM hold
Spark Indicator

Price: $194.00


Please review our Warranty, Returns & Refunds policies before you place an order.


The information provided on these pages is correct to the best of my knowledge, however the MasterTech makes no warranty, express or implied, regarding the use of, results of, or liability created from, application of this data. This information is disseminated in good faith, however MasterTech assumes NO LIABILITY whatsoever in regard to this service. The information, software, products, and services published on this web site may include inaccuracies or typographical errors. Changes are periodically added to the information herein. Mastertech may make improvements to this site at any time. Parts ordered from this website may or may not be in dealer stock at the time of order. Thank you for reading.