Maintenance Service
Scheduled Engine Service in Tampa Bay
Regular scheduled maintenance is the single best thing you can do to protect your marine engine. We handle every major service interval — from 20-hour warranty break-in services to 500-hour major overhauls — right at your dock throughout Tampa Bay.
Serving St. Pete, Clearwater, Tampa and all of Tampa Bay
What's Included
Every service comes with our white-glove project management — one point of contact, detailed estimates, and quality-checked work.
- 20-hour break-in / warranty service
- 100-hour standard service interval
- 200-hour intermediate service
- 300-hour full service
- 500-hour major overhaul service
- Engine oil and filter change at every interval
- Fuel filter and water separator service
- Cooling system inspection and flush
- Diagnostic scanning and code reading
- Impeller inspection and replacement
- Spark plug service
- Lower unit / outdrive gear oil service
- Belt and hose inspection
- Compression and leak-down testing (major intervals)
Ready to Get Started?
Contact us for a free, no-obligation estimate. We'll assess your needs and provide a detailed quote before any work begins.
White-glove project management included with every service
Why Engine Hours Matter
Marine engines track their usage in hours, just like aircraft engines. Each hour-based service interval addresses specific wear items and inspection points based on how the engine degrades over time. Skipping or delaying a service interval doesn't just risk a breakdown — it can void your warranty and accelerate wear on components that were designed to be serviced at that point. Our technicians check your engine hours, identify the correct service interval, and perform every item on the manufacturer's checklist — plus additional inspections based on our experience in the Tampa Bay saltwater environment.
What Happens at Each Interval
The 20-hour service is your engine's break-in checkpoint — critical for new and rebuilt engines, often required under warranty. The 100-hour service is the foundational interval that covers oil, filters, cooling, and diagnostics. At 200 hours, we go deeper into fuel systems, ignition components, and drivetrain. The 300-hour service adds cooling system flushes, exhaust inspection, and steering evaluation. At 500 hours, your engine gets a major overhaul: full fluid replacement, valve adjustment, injector testing, and a full systems check. Each interval builds on the previous one, creating a progressive maintenance strategy that maximizes engine life.
Don't Forget the Diagnostic Scan
Modern electronically fuel-injected marine engines store diagnostic trouble codes, sensor readings, and performance data in their ECU. At every service interval, we perform a full diagnostic scan to read this data — catching issues that may not be visible during a physical inspection. Sensor drift, intermittent faults, and fuel trim abnormalities can all be detected before they cause symptoms. This is especially valuable at the 100-hour and 500-hour intervals where engine health benchmarks are established.
Service Intervals Explained
Each interval builds on the previous one, creating a progressive maintenance strategy for your engine.
20 Hour
Service
WarrantyThe initial break-in service for new or recently rebuilt engines. Typically required under warranty, this service includes an oil and filter change, inspection of belts and hoses, and a general systems check to confirm everything is running as it should during the critical break-in period.
Oil & filter changeBelt & hose inspectionFluid level checkGeneral systems review
100 Hour
Service
RecommendedThe foundational scheduled service interval for most marine engines. Covers oil and filter changes, gear oil, fuel filter and water separator replacement, and a thorough diagnostic check. In Tampa Bay salt water we also replace the spark plugs, anodes, and the full water pump assembly at this interval instead of just inspecting them. Keeping up with 100-hour services prevents the most common causes of engine failure.
Oil & filter changeGear oil changeFuel filter & water separator replacementDiagnostic scanSpark plug replacement (gas engines)Anode replacementWater pump assembly replacement
Read the full breakdown: What's Included in a 100-Hour Outboard Service? (And Why You Need One)200 Hour
Service
Builds on the 100-hour service with deeper inspection of fuel systems, ignition components, and drivetrain. This interval is critical for catching wear items before they lead to on-water breakdowns or more expensive repairs.
All 100-hour itemsFuel system serviceIgnition system checkDrivetrain inspection
300 Hour
Service
A thorough mid-life service that includes everything from previous intervals plus cooling system service, exhaust system inspection, and steering system evaluation. Ideal for engines seeing heavy seasonal use.
All 200-hour itemsCooling system flushExhaust system inspectionSteering system checkTrim & tilt service
Read the full breakdown: The 300-Hour Outboard Service: What's In the Bill and Why It's Not Optional500 Hour
Service
Major ServiceThe most thorough scheduled service interval. Includes full engine diagnostic, complete fluid replacement, valve adjustment (where applicable), injector testing, and a full systems overhaul. This service restores peak performance and extends the life of your engine.
Full diagnostic & scanComplete fluid replacementValve adjustmentInjector testingFull systems overhaul
What to Expect: Our Service Process
For dockside diagnostic work and non-routine repairs, here's exactly how the process works — so there are no surprises from the start.
1
Initial Diagnosis Visit
We come to your dock and diagnose the issue. There is a $175 diagnosis fee — if you approve the work, it is credited toward your final invoice. If you decide not to move forward, the visit is billed on its own and you keep the diagnosis in writing.
2
Written Estimate & Approval
Based on the diagnosis, we build a written estimate and send it to you for approval through our platform. We will have a strong idea of what needs to be done — but the full picture often only becomes clear once we start taking things apart.
3
Parts Ordering & Scheduling
Once your estimate is approved and the parts arrive in-house, we schedule your job. For special-order items, we require a 50% deposit up front.
4
Work Visit 1
If the fix is what we anticipated, we complete the work on this visit. If we uncover something else contributing to the problem, we order the additional or replacement parts, revise the estimate, keep you updated, and schedule a second visit as quickly as possible.
5
Work Visit 2 (If Needed)
When a second visit is required, we complete the service and test everything to confirm the issue is fully resolved.
6
Billing & Payment
When the job is done, we reconcile parts and labor to the actual amounts and send your final invoice — along with photos for your records — through our platform. Pay by ACH with no fee, or by credit card with a 3.5% processing fee.
$175 Diagnosis Visit
Credited toward your invoice when you approve the work. If you pass, it is billed on its own and you keep the written diagnosis.
50% Deposit on Special Orders
When a job requires special-order parts, we collect a 50% deposit up front before the work is scheduled.
ACH Free · Card +3.5%
Pay through our platform by ACH with no fee, or by credit card with a 3.5% processing fee. Both are always available.
Save with Management
Management Customers Save on Every Service
Mobile Marina management customers get exclusive discounts on maintenance and fuel, plus proactive inspections that catch problems before they become expensive.
$0.20 Off Fuel
Per gallon on every delivery
10% Off Labor
On all maintenance services
Early Detection
Monthly inspections catch issues
Service History
Complete timeline in the app
Scheduled Engine Service FAQ
Common questions about our scheduled engine service services
Service Guides
Service Guides & Cost Breakdowns
Deep-dive articles covering what this service includes, what it costs, and what happens if it gets skipped.
Yamaha Outboard Maintenance Schedule: Hour-by-Hour Chart
Yamaha outboard maintenance schedule by the hour: what's due at 20, 100, 300, 500, and 1,000 hours, and what Tampa Bay salt water changes on your engine.
Read the guide
Mercury Outboard Maintenance Schedule: The Real Intervals (Not Just the Manual)
The real Mercury outboard maintenance schedule: break-in, 100-hour, and 300-hour intervals, what Tampa Bay salt water changes, and real costs.
Read the guide
300 Hour Service
The 300-Hour Outboard Service: What's In the Bill and Why It's Not Optional
What a 300-hour outboard service includes, line by line: powerhead, fuel, cooling, lower unit and electrical, plus 2026 Tampa Bay cost ranges by brand.
Read the guide
100 Hour Service
What's Included in a 100-Hour Outboard Service? (And Why You Need One)
The 11-line 100-hour outboard service Mobile Marina runs in St. Pete, Clearwater and across Tampa Bay: what's on the invoice and what it costs.
Read the guide
Outboard Motor Maintenance: Yamaha, Mercury & Suzuki
Outboard maintenance for Yamaha, Mercury, and Suzuki engines: service intervals, warning signs, costs, and dockside help in St. Pete and Clearwater.
Read the guide
Need Scheduled Engine Service?
Contact us today for a free estimate. Our team is ready to help — dockside service available throughout Tampa Bay.