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-   -   PM 300 - dark and wet plug - help! (https://www.offshoreonly.com/forums/general-q/56564-pm-300-dark-wet-plug-help.html)

Toffen 08-10-2003 06:56 AM
PM 300 - dark and wet plug - help!
 
Hi!

Number 5 runs dark and wet. The engine stumbles at idle now and then, but runs ok at cruise.

We have cleaned and blueprinted the injector (s), so that should be fine. Swopped the plug with another one, and the dark one went tan, and the tan went dark.

So something is wrong with the number 5. Tomorrow we will do a compression and leakdown test. Maybe its the ignition. Hope so!

I am confused as the engine runs ok at cruise (4.000 - 5.000 rpms), but stumbles at idle.

Any ideas??

Cheeers, Toffen G

homan 08-10-2003 08:13 PM
can you pull #5 inj. and see if it's a leaker

Bajaforce 08-11-2003 07:48 AM
sounds like a bad injector to me. had the same problem on one of my 496ho.

lewisdre 08-11-2003 11:20 AM
Is it wet with gas? ANy chance it is water reversion?


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