Status Report on SD/I Saltwater Test Program

NMMA/EPA Meeting

January 24, 2006

• Status of program– Short of targeted hours of operation– Issues with exhaust manifolds on two of the

three boats– Additional funding needed

• Planned next steps– Resolution of issues– Continued testing

Overview

Maxum

Malibu

Sea Ray

No emission data taken on in-use engines

21 ft sterndrive4.3 L V637 hours accumulatedNo apparent problems

19 ft inboard straight-drive5.7 L V8100 hours accumulatedWater leaks at thermocouples upstream of catalyst

22 ft sterndrive5.7 L V8OBD-M system55 hours accumulatedCatalyst positioned too close to water mixing point

Status Summary

Maxum

Catalyst location close to engine (away from water mixing point)

No visible deterioration of catalysts

PPM testing shows good test results

Next Steps: Continue to operate in existing configuration

Next Steps: Replace parts of manifold that have developed risks of leaks Keep same manifold design

(except no through-jacket thermocouples upstream of catalysts) Put boat back in service with new catalysts

Malibu Water leaks at thermocouple fittings upstream of catalysts

Damage through the catalyst

inlet

exit

Sea Ray

Next Steps: Redesign manifold to move catalysts closer to engine/add baffles Put boat back in service with new catalysts/manifolds

Catalysts very close to water mixing point

Oxygen sensor still operational

Salt deposits on catalyst exit

inlet

exit

Planned Next Steps• Rebuild manifolds for Malibu and Sea Ray

– Modify catalyst location on Sea Ray– Re-baseline emissions– Begin operation from zero hours

• Continue operation with Texas Parks & Wildlife– Boating season coming up soon– Evaluate hour accumulation at end of season

• Other modifications– Better maintenance of engines (flushing)– Modify thermostat housings

• Work out funding for additional operation