SPB #351 Rev. 1April, 1965SUBJECT: ONGARO MK-35 FUEL FLOWMETER - TACHOMETER TEST LAB.
LETS STOP GUESSING ABOUT ENGINE RPM & FUEL CONSUMPTION!

The subject portable test lab, as pictured, is now available from ONGARO DYNAMICS INDUSTRIES. The test lab is for in the shop or on the water use. A portable instrument designed and constructed especially to benefit you, the dealer, and your customers in many ways. Some of these benefits are as follows:
- The MK-35 TEST LAB is quickly adaptable to all OMC outboard engines with the non-pressurized fuel system (hook-up time approximately 5 minutes).
- The tachometer reads engine RPM to assist in making correct propeller selections for optimum performance. (This tachometer
is adaptable to all two cycle engines, one through six cylinders, and four cycle engines, two through eight cylinders, battery or magneto ignition.)
- The flowmeter senses rate of fuel flow at all engine speeds. (SHOW YOUR CUSTOMERS HOW TO OPERATE THEIR ENGINES FOR PEAK ECONOMY - Savings of 20 to 40% can be had by running in the fuel saver range.)
- The flowmeter will assist you in evaluation or verification of occasional complaints of excessive fuel consumption. (We know that fuel consumption is the greatest at full throttle. DEMONSTRATE TO YOUR CUSTOMERS HOW THEY CAN RUN JUST BELOW FULL THROTTLE AND PRACTICALLY CUT THEIR FUEL BILL IN HALF.)
FUEL CONSUMPTION TESTS SHOULD ONLY BE MADE AFTER THE ENGINE HAS REACHED NORMAL OPERATING TEMPERATURE. DO NOT ATTEMPT TO TEST RATE OF FUEL FLOW ON AN ENGINE THAT IS NOT COMPLETELY WARMED UP, OR IN NEED OF A TUNE-UP.
NOTE: Fuel consumption will vary for a number of reasons, several of which are as follows (cont'd on next page):
Page #2 SPB-#351-Rev. 1
- Incorrect high speed jet or jets being used (refer to Johnson Service Bulletin SB-#982).
- Slow speed jet or jets adjusted to rich (all engines).
- High speed jet or jets adjusted to rich (engines with adjustable high speed jets).
- Improperly adjusted or partially closed choke (manual or automatic).
- Carburetor float improperly adjusted (float to high).
- Leaky float valve needle and seat.
- Atmospheric conditions (high barometer), etc.
- Boat not properly trimmed.
- Incorrect propeller application, etc., etc., etc.
The same service that the MK-35 TEST LAB provides for you when diagnosing and correcting problems, can be passed on to the customer. Permanent tachometer and flowmeter installations in the boat offers proof at a glance that the engine is continuing to perform as it should. Additional advantages of permanent installations can be derived in the form of economical operation - by indicating what degree of throttle advance offers the most economical operation in all types of use. Why not also boost your accessory sales? - tachometer and flowmeters of this type, for permanent installations, are available from your Parts Distributor as separate units.
NOTE: Place your order today for the new more versatile model ONGARO MK-35 TEST LAB. This new unit complete with instructions is available at $78.50 net. (If full remittance is received with your order, postage will be prepaid.)
FURTHER NOTE: Dealers who already have the early model MK-35 TEST LAB, will be allowed full credit for their old unit if they wish to trade it in on the new improved Model. Cost of the new MK-35 TEST LAB in this case will be $18.65 net. (Your old unit must accompany your order for the new unit. Send old unit back postage paid.)
Send your order to - ONGARO DYNAMIC INDUSTRIES
P.O. BOX 218
CHURCH ROAD
NORTH WALES, PENNSYLVANIA
DO NOT SEND YOUR ORDER TO JOHNSON MOTORS OR YOUR PARTS DISTRIBUTOR.
Jack PenlandService Promotion Manager
JP:rs