Mercury / Mariner 65-115 HP 4-Stroke EFI Fuel Injector Cleaning & Flow Testing

The Deka 39-NO41 is a MPFI marine fuel injector used in Mercury/Mariner 4-stroke EFI outboards: 65, 75, 80, 90, 100, 115 HP (including 65/80 Jet); MerCruiser 4.5L MPI and 6.2L MPI sterndrives. We ultrasonic-clean and flow-test injectors like this one in our shop, then send back before-and-after data so you know exactly what you're getting.

Manufacturer	Deka
Part number	39-NO41
Type	MPFI marine
Connector	EV14 compact (Jetronic port, extended 8-hole nozzle)

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Our measured results

These are the actual before-and-after numbers from our flow bench for the Deka 39-NO41 — not published estimates.

Tested in our shop	4 injector(s) @ 40.0 psi
Measured coil (avg)	12.72 Ω
10s open flow (avg)	50.5 → 52.0 ml (+3.0%)
60s pulsed flow (avg)	50.5 → 50.5 ml
Leak test after cleaning	4/4 PASS

Also known as / cross-references

The Deka 39-NO41 is interchangeable with or cross-references to these part numbers:

8M6002428 (Mercury OEM)8M00576868M6000652

What vehicles use the Deka 39-NO41?

Mercury/Mariner 4-stroke EFI outboards: 65, 75, 80, 90, 100, 115 HP (including 65/80 Jet); MerCruiser 4.5L MPI and 6.2L MPI sterndrives

How we service it

Every injector gets ultrasonic cleaning, backflushing, before-and-after flow testing (static and dynamic), leak testing, spray-pattern inspection, and new O-rings and micro-filter baskets where available — plus a detailed Injector Performance Report. Round-trip USPS shipping is $15 flat.

Frequently asked questions

What vehicles use the Deka 39-NO41 injector?

The Deka 39-NO41 is used in Mercury/Mariner 4-stroke EFI outboards: 65, 75, 80, 90, 100, 115 HP (including 65/80 Jet); MerCruiser 4.5L MPI and 6.2L MPI sterndrives.

Can you clean and test a 39-NO41 injector?

Yes. We ultrasonic-clean, backflush, and flow-test the Deka 39-NO41 on our bench, including before-and-after open and pulsed flow, leak testing, and spray-pattern inspection, with new O-rings where available.

What did the 39-NO41 flow at?

On our bench, 4 39-NO41 injectors averaged 50.5 ml open flow before cleaning and 52.0 ml after, tested at 40.0 psi.

How much does it cost?

Standard MPFI top-feed injectors are $30 each; side-feed, GDI, TBI and specialty injectors are $35 each. Round-trip shipping is $15 flat, 4-injector minimum.

How do I send them in?

Start an order on our Get Started page, ship your injectors to our Weymouth, MA shop, and we return them cleaned, tested, and documented.

Send in your 39-NO41 injectors

Mail-in cleaning and flow testing with a full before/after report. 4-injector minimum, $15 flat round-trip shipping.

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