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Interstate Marine

Outboard service & repair

Outboard motor repair and maintenance.

All outboard brands, serviced and repaired at our Belton shop.

Outboard repair

If your outboard won’t start, runs rough, overheats or isn’t performing the way it should, bring it in. Diagnosis is part of the repair. After service or repair, we verify operation using testing methods appropriate to your boat and the work performed. This may include diagnostic equipment, an appropriate cooling-water supply, and lake testing when needed.

Outboard maintenance services we offer

  • Four-stroke engine oil and filter changes
  • Two-stroke oil reservoir, lines, and injection-system inspection
  • Lower-unit gear oil changes
  • Gear oil inspection for water contamination or metal debris
  • Drain-plug seal replacement
  • Lower-unit pressure and vacuum testing when indicated
  • Spark plug inspection and replacement
  • Fuel filter and fuel/water separator replacement
  • Air-intake and applicable air-filter service
  • Water-pump impeller and housing service
  • Thermostat inspection and replacement
  • Cooling-water passage flushing
  • Timing-belt inspection and scheduled replacement

Outboard questions

Do you service two-stroke and four-stroke outboards?

Yes. Service includes four-stroke oil and filter changes and two-stroke oil reservoir, line and injection-system inspection.

Do you check the gear oil for water?

Yes. Lower-unit gear oil service includes inspection for water contamination or metal debris, with pressure and vacuum testing when indicated.

Tell us about your boat

Call with the boat’s make and model, the engine make, model and hours if known, and what you’re noticing. Customers bring their boats to our shop at 8398 S. IH35 Service Rd, Belton, TX 76513.