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1999 200hp Optimax DFI

B

Badcreek

New member
My motor bogs down at times when getting out of the hole. If I stop, turn the key off, let it sit for a few seconds, start it again, it works fine. It also loses power when running sometimes. If I stop ,shut it down and start it again, it works fine again, till the next time. This happens 2 or 3 times each day on the water.
I am running a fairly heavy 23' cuddy cabin. It idles fine, plugs look good, can't figure it out.
Any Ideas will be appreciated. It has a new power head and carburetor block.
Thanks, Badcreek
 
The problem you express is intermittant and could be one or more of a number of issues. Since the engine was disassembled start by making sure each electrical connection and plug on the engine and battery is clean and tight.
 
Already did it. This problem was occurring before the power head was replaced. I'm thinking it is a fuel problem, probably too much at blast off. But while running maybe not. What regulates the gas flow besides the throttle? I know what to do if it were a 'Rude.
Creek
 
What regulates the gas flow besides the throttle?
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Injectors and fuel regulator. No wasp nests in the air intake cover?

It also loses power when running sometimes.
Click to expand...

I assume you don't lose electrical power. Have you checked the fuel system: Is the fuel pump pressure holding, the fuel filter(s) good and tank pickup tube not clogged, fuel hoses not swollen inside where you can't see, the antisiphon valve working, tank vent open not partially plugged, vent hose not kinked or plugged?
 
You can chase your tail for a long time of bite the bullet and haul her over to the dealer. A few minutes plugged into a DDT will tell you everything you need to know. This particular motor makes the engine in your car look like something that you might see in Fred Flintstones wagon - it's really that technically advanced.

To me it sounds like one of your sensors in on the way (M.A.P. comes immediately to mind). Keying "off" is temporarily clearing the error and allowing it to run (fine) again until the engine computer gets another error.

There is no effective way to troubleshoot the sensors "at home" - if you unplug one to see if it's the problem, the computer simply "assumes" that it's still there and feeds itself the data it expects to get from that sensor.

No way around it, you need to take her in and have it read...
 
That's kind of what I thought. Now I just need to find a good one in Upstate SC. The one who did the power head sucks.
Thanks, Creek
 
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