89 Evinrude XP150 (E150STLCEM) cold start issue

[Mike82]

I have been having issues with this motor starting the last couple years. I took it in last year and they said I was not getting spark out of one of the power packs. They replaced it and it seemed to start better for about a week then the same thing. Once it starts up once it will fire right up after that no problem the rest of the day. Its after it sits it gives me problems.
When I try to start it it pops off almost like just one piston fires then I have to shut the key off and do it again usually once it pops once it will keep doing that almost immediatly after I crank it.
When I do get it started acts like not all pistons are firing right away but within 10 seconds it sounds like they all kick in and idles normal.
I came across this forum and thought I would see if any of you guys have any ideas why it might be doing this.

 

[emdsapmgr]

Re: 89 Evinrude XP150 (E150STLCEM) cold start issue

1. Make sure the cold start solenoid is actually pumping fuel into the hose barbs on the top of each carb when the key is turned to "on" and is pushed in. Pull that small hose off the topmost carb and activate the solenoid. You should see fuel pulsing out of that hose. 2. If the carbs leak any fuel into the airbox cover, that excess gets recirculated into #6 cylinder. That extra fuel and oil will cause temporary running/idling issues for a minute or so after startup-till it is burned off. 3. That engine probably has plastic carb bowls. A common problem is that they warp-causing fuel/air leaks between the bowl tops and the underside of the carb body. Pull the bowls off and check them on a pc of glass. They should be replaced with the older style aluminum bowls.

 

[boobie]

Re: 89 Evinrude XP150 (E150STLCEM) cold start issue

The only time the cold start primer is pumping fuel into the cyls is when the key is pushed in and in the start position having the vro pumping the fuel to the primer, then to the carbs.

 

[Mike82]

Re: 89 Evinrude XP150 (E150STLCEM) cold start issue

Thanks for all the info guys I plan on working on the motor Wed after work. I plan on checking the cold start solenoid is actually pumping fuel. One thing I forgot to add is i get alot of gas leaking out after I set the boat down after running her wide open. It clears up after a minute just not sure why sge does that. I will keep you guys updated after I check her out tommoro. One thing i was going to ask is I read on this forum from a post that before starting this engine it will help if I hold the key pushed in 5 seconds to help get enough gas in there for starting. Is this accurate or not a good idea?

 

[boobie]

Re: 89 Evinrude XP150 (E150STLCEM) cold start issue

Read my post above.

 

[emdsapmgr]

Re: 89 Evinrude XP150 (E150STLCEM) cold start issue

I push the key in for 5 seconds, then crank it and keep pushing in as I crank. When the engine first fires, I quit choking. Usually the enigne will quickly start to die, so I rechoke it. You will have to keep choking, releasing for the first minute, till the engine warms up enough to keep running. I don't find that these crossflows flood very easily. Your engine has a feature called Quickstart. On your model, the timing is automatically advanced slightly when cold. This makes the cold starting process easier. Once the powerhead reaches 92 degrees, or the rpm's reach 1300, the extra timing advance is cancelled. Usually this quickstart feature works for only the minute.

 

[boobie]

Re: 89 Evinrude XP150 (E150STLCEM) cold start issue

"Different strokes for different folks". The only thing you are doing by holding the key in for 5 seconds is bleeding off the fuel that is in the system from pumping up the primer bulb.

 

[Mike82]

Re: 89 Evinrude XP150 (E150STLCEM) cold start issue

I got a chance to work on the motor tonight. I checked to see if the cold start solenoid is actually pumping fuel which it is. It will pump fuel for about 5 seconds when the ball is pumped up. I then primed for 5 seconds and hit the key while still in and it popped off right away like it did before like only one was firing. I then did the 5 second deal again and it did it again just popped one time and died. I then primed it again but this time advanced the gas a little while holding the key in and it fired right up. '
Mine does the thing were it sounds like it is going to die right away I have always just advanced the gas back and forth a couple times to get it back going then it takes off.
I ended up buying a complete set of carborators off ebay for $75 that has the aluminum bowls it was cheaper that way then to just buy the bowls, lol. I think you are right they are leaking, there is gas all over them.
Is this just a issue with these motors that they start hard and a person has to do this prime thing to get them started?
One question I was going to ask off topic a llittle I need to replace the water jacket gasket and head gaskets this year. The waster jacket started leaking water in one spot at the end of last year and there is also aniother spot on the left head that i noticed has a small leak. Is there any pointers you guys can give to look for or to do when taking off and putting back together?

 

[emdsapmgr]

Re: 89 Evinrude XP150 (E150STLCEM) cold start issue

If you find you have any questions when you get into replacing gaskets, post a picture or two.

 

[Mike82]

Re: 89 Evinrude XP150 (E150STLCEM) cold start issue

I was talking to another gentalmen that has worked on this motor told me to avoid them choking out while they are ideling in the water you should tilt them up. Is there any truth to that or is he just trying to sell me a bad motor?

 

[emdsapmgr]

Re: 89 Evinrude XP150 (E150STLCEM) cold start issue

The higher you get the exhaust outlet, the less backpressure you have. The engine idle easier and the idle rpm's will go up as a result. It's possible his recommended solution is to compensate for some other problem.