Sea-Doo GTI / GTX / Wake 4-TEC 130/155 Fuel Injector Cleaning & Flow Testing

The Deka 109037 is a MPFI marine PWC fuel injector used in Sea-Doo 4-TEC 130/155 hp PWC: GTI, GTI SE, GTS, GTX, Wake (Rotax 1503 naturally aspirated, 2006-2015). 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	109037
Type	MPFI marine PWC

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Our measured results

These are the actual before-and-after numbers from our flow bench for the Deka 109037 — not published estimates.

Tested in our shop	3 injector(s) @ 40.0 psi
Measured coil (avg)	12.6 Ω
10s open flow (avg)	33.0 → 57.33 ml (+73.7%)
60s pulsed flow (avg)	35.33 → 57.33 ml
Leak test after cleaning	3/3 PASS

Also known as / cross-references

The Deka 109037 is interchangeable with or cross-references to these part numbers:

420874848 (Sea-Doo OEM set of 3)

What vehicles use the Deka 109037?

Sea-Doo 4-TEC 130/155 hp PWC: GTI, GTI SE, GTS, GTX, Wake (Rotax 1503 naturally aspirated, 2006-2015)

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 109037 injector?

The Deka 109037 is used in Sea-Doo 4-TEC 130/155 hp PWC: GTI, GTI SE, GTS, GTX, Wake (Rotax 1503 naturally aspirated, 2006-2015).

Can you clean and test a 109037 injector?

Yes. We ultrasonic-clean, backflush, and flow-test the Deka 109037 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 109037 flow at?

On our bench, 3 109037 injectors averaged 33.0 ml open flow before cleaning and 57.33 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 109037 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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