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Old 28 June 2010, 11:01   #1
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Optimax 225 power loss

Not sure if anyone has had similar before but:

Opti is loosing power and suffering surges of power loss when at speed. It is triggered off by hitting a wave or rough water then power dies, fuel flow appears to remain the same. throttle down clears it temporarily but after the first sign it is then remains. Sounds like revving if happening at high revs (except it is doing it in reverse).

Any ideas as to what this could be? I have checked fuel line and that looks ok, no leaks or kinks or stoppages that i can see. wonder if it may be electrics...

Just in time for the sunny weather!
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Old 28 June 2010, 11:10   #2
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We had losses of power/faultering recently. We had a lumpy idle with a hunting/stalling temperament since we got it but when alarms went off due to a sticking stat the Diagnostics also pointed to a small box which is the air/fuel sensor. 150 for the box!!! But it sorted it out, running like a dream now. (finally) lucky still under warranty!

I'd say get it on the diagnostics!
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Old 28 June 2010, 11:31   #3
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when we had the scorp with an opti i had an engineer come and run the diagnostics on it before we bought it! it told him lots so could be worth a look. if you want his details (he is based this side of the water so you may need to come over) but its Steve of SEA Marine 07765 838040

could be worth a shot?
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Old 28 June 2010, 13:58   #4
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My opti lost power at high revs last year - fine at 25knts or less but when high ( 50 lph+ fuel flows ) just not got any any grunt. No misfire either. The local opti guru ( and he is that good) did a quick chage of the main filter, changes the priming bulb and all was fine . Worth doing for 20 of parts ???

Pete
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Old 28 June 2010, 15:37   #5
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If you have a water separating fuel filter, check its contents/replace.

Going over waves/rough water, maybe throwing caught water into the fuel lines.
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Old 28 June 2010, 15:48   #6
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Filters all replaced around 10 hours ago. trying to find somone near who can run up on the diagnostics. does feel like something is loose or effected by movement as it starts as soon as that first fun wave hits... mind you, 600 hours on the clock and 'till now has never missed a beat so perhaps I am due some Opti fun. Thanks for ideas...
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Old 28 June 2010, 15:57   #7
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Hmmm, in that case it could be a loose earth on the engine.

Are you running Smartcraft gauges, if so do they shut off for a moment during the power loss ?
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Old 28 June 2010, 16:18   #8
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no they remain as normal. fuel flow seems to remain the same - even when it starts hunting around.
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Old 28 June 2010, 17:35   #9
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Not a crimped supply pipe issue somewhere ? and ofcourse the old favourite when things get a bit bouncy.. the pick up pipe in the tank starts to float, or draws air when fuel starts to slosh about ?
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Old 29 June 2010, 04:06   #10
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i thought crimped fuel pipe - it does all seem to point that way but not found one yet... the thing is that the fuel flow rate stays the same, it doesnt drop (on the smart craft)
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