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Crank but no start

T

tbuck

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"I have a 1998 Johnson 150 hp

"I have a 1998 Johnson 150 hp ficht with hard fuel rails. It was sitting for 4 years prior to my acquiring it. I have replaced everything from gas cap to low pressure lift pump. including new spark plugs, water pump and thermostats. All new fluids including gas. I can get the motor to start sometimes, run and mostly stall on its own in idle. I can never get it to start twice. The bulb is hard and fuel poors out the engine fuel filter when I pump the bulb. I changed the ground wire from the battery to block and now I can hear the electric or high pressure pump priming. I was told that these symptoms could be either my lift pump, electric pump, vapor seperator, or emm (computer). All of these are expensive to replace. How do I know which one to start with? There is no fuel pressure gage inlet in between the high pressure pump and injectors. The lift pump is directly attached to the vapor seperator so I cannot test these with fuel pressure gage either. HElp me through this none please. Marine mechanics around here cost $100 dollars/hr."
 
"Thom,

You really need a la

"Thom,

You really need a lap top and the proper software for these engines. It is very difficult to diagnose many problems without those.

Tony"
 
"Thanks Tony,

I am trying t

"Thanks Tony,

I am trying to avoid the $300 program but running out of suggestions. Will the program be able to figure out the problem between the symptoms without the motor running?"
 
"normally----yes.............i

"normally----yes.............its an amazing feature,....but,..not fool proof!....fuel inj engines,...have long surpassed the days of chging plugs under a shade tree....they are highly,technoligically advanced,items,..in a very small area/package......its dealer time,in my opinion,.."
 
"welcome to the boating world

"welcome to the boating world
a boat is a hole in the water witch one pours money, i think thats how its said"
 
"no other ideas as to isolatin

"no other ideas as to isolating between lift and elctric pump and vapor separator? also could be emm. The boat runs sometimes, but never starts twice. I heard that the electric pumps do run cold but will quit when they warm up. I made an appointment for monday with a marine machanic, but woud love a way to tell without using a diagnostic computer."
 
"not on a ficht---it needs the

"not on a ficht---it needs the latest,not an obsolete program off ebay,..to eval it..
as we progress in these engines...this,...is the norm!"
 
"I wired the ignition directly

"I wired the ignition directly to engine and it seems to be acting fine. Runs, shuts off, runs warm... I read in the manuel to carefully look over all ground wires that this engine seems to have alot of trouble with wiring. My ignition wiring had a purple wire loose so I am going to replace the harness from ignition to engine and see if that was my only problem!! Next is the sea trial....
Thanks for everyone help, it lead me in the right direction!"
 
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