I have a 99 310 with MIE 350 MAG...
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12-22-2020 10:54 AM
I have a 99 310 with MIE 350 MAG MPI V DRIVES PORT ENGINE HAS LOSS OF POWER WON'T RUN OVER 3,000 RPM AT FULL THROTTLE
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12-22-2020 07:24 PM
Assuming the starboard engine gets up to full rpm, such as 4,600 rpm, is that correct?
If both engines are affected then the first thing to inspect / resolve is marine growth on the hull and the running gear. That is the most common issue for the symptom.
Afterwards, then all the standard engine tests are required, including: fuel pressure; fuel pressure versus rpm; timing; spark plug gap; compression; flame arrestor cleaning and intake plenum cleaning.
Many of these require skills, tools and factory documentation, so don't jump in w/o being prepared.
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12-23-2020 08:10 AM
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12-23-2020 08:39 AM
All sixteen injectors were all sent out to a company for before / after testing and cleaning. Several were incapable of restoration, requiring replacement.
The removal and cleaning of the intake plenum is part of my annual maintenance. It is required on my engine to maintain normal performance.
Both the fuel pressure and the fuel pressure regulator should be checked per the Factory Service Manual (FSM).
Other normal stuff, like distributor cap / rotor inspection / replacement and spark plug wire testing / replacement are part of the effort to restore normal performance.
Assuming salt water operation now, w/ raw water cooled exhaust, don't forget to include annual exhaust disassembly for internal raw water passage inspection and periodic exhaust replacement. The typical cycle is 3-5 years for OEM parts.
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12-23-2020 12:21 PM
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12-23-2020 07:45 PM
One common effect from neglected raw water cooled exhaust is severe or total engine damage, including valve failure. That is why annual disassembly for inspection / periodic replacement is recommended.
Hopefully the engine restoration is possible at an acceptable cost.
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12-27-2020 05:27 AM
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12-27-2020 01:28 PM
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12-28-2020 12:05 PM
Sorry to report #4 cyl dead (0 cmprshn), 50% cmprshn in #5 & 6
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12-28-2020 12:08 PM
Has anyone else experienced waiting th as long for new engines, or parts??