150 XR4 Black Max Dies at Idle

mskrom

Cadet
Joined
Oct 4, 2006
Messages
16
Hi folks-

I've got a 1991 150 Black Max that I had been having a real hard time with lately. It will start just fine in Hi Idle, and will stay in Hi Idle and warm up OK, but when you kick down the Hi idle and go to shift into forward, you have to do it very quickly because the motor will not idle at normal speed for more than a couple of seconds before it dies.

That being said, it will re-start easily, but you have to start it in hi idle and shift into gear quick to keep RPMs up before it dies again.

Once underway, the engine seems to be happy and runs nice, as far as I can tell by just listening to it......

I recently bought a repair manual, and found a section on the Idle Stabilizer, which seemed suspect to me.....even moreso once I did some searches on these forums.


Would a faulty Idle Stabilizer cause my engine to die out at idle, yet be OK under power?

If so, would the removal of the idle stabilizer return my normal idle to "normal" and not die?

If getting me back in business is as simple as ripping out the Idle Stabilizer so I can idle and shift normally, I'll gladly do it, but I don't want to take chances of burning up my motor either.

Any advice is appreciated-
 

150BlackMax

Cadet
Joined
Jul 17, 2007
Messages
9
Re: 150 XR4 Black Max Dies at Idle

My 89 150 idled much much better after changing the fuel pump innards..the old ones literally fell apart in my hand when I took them out of the housing. Before, I always had to work the 'hot foot' to keep it running...now after it's initial startup and run, to restart I just bump the key and she idles great.
 
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