1992 Merc 200 HP XRI fuel issue ?

gman6788

Recruit
Joined
Sep 20, 2016
Messages
1
This boat has been at 2 different mechanics and nobody knows ? It has a new fuel pump , brain box is good , hoses ect replaced , I have heard this is the first year of fuel injection. Starts up no problem , sometimes runs like a bat out of hell ... then out of nowhere it like goes into safe mode. It will idle and putt all day long but trying to go on plane wont happen. Out of gear it will red line , but as soon as you goose it in gear in just stalls out ? Any ideas , 2 mechanics have went tits up on me . Seems to me something is putting it into limp (safe mode)
 

Faztbullet

Supreme Mariner
Joined
Mar 2, 2008
Messages
15,937
Seems to me something is putting it into limp (safe mode)
No such thing on that engine...either the stator is dropping the high speed windings.TPS is failing or MAP sensor hose is filling with fuel and ECU not sensing or ECU is defective.
 

Dukedog

Captain
Joined
Oct 6, 2009
Messages
3,496
like faz says.. no such thing..
first efi in late '86/'87..
which fuel pump?..
how is ecu known to be good?.. its an analog with really no "reliable" test..
may be pump driver goin' south....
fuel pressure checked when it acts up?

when it acts up what is max rpm or will not go beyond idle?

if rpm goes to 2000/3000 max but will not plane look at stator...
..... jmo.
 
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