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Clogged, rough-running, or sat too long

Marine fuel injector cleaning and flow testing.

Ship your injectors in. Professional ASNU M-5000 bench: ultrasonic clean, dynamic flow testing, new filter baskets and O-rings. Returned with a diagnostic report showing before/after flow rates and variance across the set.

Ship in 3 steps

Tell us about your injectors

Thirty seconds. Name, address, engine, count.

Get your UPS label

Emailed in thirty seconds. PDF or QR code, your call.

Drop the box

Drop it at any UPS counter, where they scan the QR right off your phone.

Ship Your Injectors

From $25/injector · see pricing. No credit card required to start. Questions? Call (864) 400-5775.

Travis + Jason · The guys who do the work.

48 Hour Turn

Tested, reported
& shipped

Pay When Done

Service complete
+ diagnostic report

Includes Parts

O-rings, filter baskets,
teflon rings, pintle caps

Mercury·Yamaha·Honda·Suzuki·Tohatsu

How We Dial Your Injectors In

Every marine fuel injector we service is tested, cleaned, and retested on professional ASNU equipment. Nothing leaves our shop until it's Dialed In.

Spray Pattern Testing

Every injector is individually spray tested and visually inspected for atomization quality, leak down, and electrical resistance. Poor spray patterns cause rough idle and misfires — problems that don't show up in flow data alone.

Flow Rate Analysis

Precision flow testing measures each injector's output in cc/min against the full set. We calculate variance across all cylinders. The industry generally allows for 5% in marine applications, but we shoot for 4%.

Diagnostic report showing before and after flow data with variance analysis

Rebuild & Report

New o-rings, seals, and filter baskets go on every injector we clean, itemized at cost on your invoice. Your diagnostic report documents the full service: before and after flow rates, spray pattern grades, variance analysis, parts replaced, and our recommendations.

Benchmark
Clean
Replace components
Test ohms + impedance
Real-world flow test
Diagnostic report

Professional Equipment. Transparent Results.

The same diagnostic equipment major injector remanufacturers run. Every result documented, before and after.

ASNU M-5000

The professional diagnostic bench major injector remanufacturers run. Spec-grade flow testing on every cylinder, every job.

Before & After Data

Every injector flow tested when it arrives, then again after cleaning. You see exactly what the service changed. In cc/min, not adjectives.

Full Documentation

Your report has flow rates, spray pattern grades, variance across the set, and every part replaced. Ships in the box with your injectors.

Based in the Southeast · Serving boat owners and marinas nationwide.

What customers say

★★★★★

“Fuel injector cleaning made easy! So simple and now have peace of mind.”

Leia · Google review

★★★★★

“Fast fast turn around even on a Saturday! Kept me up to date on the progress, also sent paperwork on them, not just ‘yea they good’ on a txt or email. What they do is 200% ‘dialed in.’”

Justin · Google review

★★★★★

“Travis and Jason went through all injectors quickly so I could get back on the water for an event by the weekend. They used their knowledge to help me troubleshoot the engine farther and we found the likely culprit of my issues beyond the injectors.”

T Borto · Google review

Common questions

The short answers — call or email if you need more.

What if an injector can't be cleaned to spec?

We show you the result on your diagnostic report and we don't charge for that injector. The rest of the set still gets the full service, and we'll point you toward a replacement or rebuilt unit if one's a good fit.

Do I need a printer to ship my injectors in?

No. The UPS QR code we email lives on your phone, and any UPS counter scans it and prints the label for you. If you'd rather print at home, the PDF works too, or grab the paper form and ship with the carrier of your choice.

How long does the whole round trip take?

Plan on about a week door to door. UPS Ground typically runs two to three business days each way, with our 48-hour service window in between. Need it faster? Call us before you ship and we'll work out the timing.

Are parts included in the service price?

Yes. New o-rings, seals, filter baskets, teflon rings, and pintle caps go on every injector we clean, itemized at cost on your invoice. One per-injector price covers cleaning, testing, parts, and the diagnostic report.

Do you service diesel injectors?

No. Diesel injectors run at far higher pressures (commonly 20,000+ psi for common-rail systems) and require specialized high-pressure test equipment we don't operate. We focus on gas marine fuel injectors: outboards plus standard top-feed inboards like MerCruiser and Volvo Penta gas. For diesel work, look for a shop that specifically advertises common-rail or HEUI service.

Get Dialed In.

Tell us about your injectors. We email your UPS label. You drop the box at any UPS counter.

We cover the shipping label and bill once, when your report is ready. You don't need to enter a card to start.

Ship Your Injectors →

Prefer to ship your own?

Questions? Call (864) 400-5775 or email [email protected]