Evinrude 150XP

[Stevebandl]

My motor  runs good on idle but bogs down and dies when I put the throttle down. 

Any suggestions?

I’m new to this forum. 

[J Francho]

That could be a ton of things.  Not sure anyone can diagnose it online.

[Breakwater Bouy]

On 4/15/2019 at 12:53 PM, Stevebandl said:

My motor  runs good on idle but bogs down and dies when I put the throttle down. 

Any suggestions?

I’m new to this forum. 

need more details of the engine please...if it's carbed?... then usually but not always that bogging is caused by a fuel flow issue, carbs dirty, fuel filter screen full of partials, high speed jets clogged. I'm no professional outboard mechanic, but some on this forum are and I'm sure someone will chime in and point you direction you need to troubleshoot. Good Luck! 

[Way2slow]

As JFrancho said, can be a number of problems.

 

1st I would do a synchronization on the carbs and linkage.  Someone may have tried to adjust the idle and did it wrong.  A lot of people will try to adjust the stop bolt on the linkage where it hits the block.  Wrong place.  Idle is adjusted with the timing knob on top of the block but only have all the timing marks on the linkage and the carb butterflies are synchronized.  Also, make sure the cam roller is in tack that opens the carbs.  It should be about 3/8" in diameter and have a clear looking cover.  If it's 1/4" in diameter and black, it's missing the outer shell and needs to be replace, that throws the synchronization off.

 

2nd, if the low speed jets are adjustable, open each one, one turn and see how it does.  Again, some one may have tried to adjust them and you can't do that on a hose.  The motor has to be sitting at normal depth in the lake and trimmed verticle with the water so carbs are sitting level.   If it's giving you a lean cough/spit, it's definitely too lean.  Two strokes have to be run just a touch on the rich side on idle. 

 

3rd, if the carbs are not adjustable, they need to be removed and give a proper cleaning and float levels set.  Low speed jets might be clogged.  By the way, high speed jets have nothing to do with it starting off and getting on plane.

 

4th, You need to do a leak down or compression check.  Low compression will cause it to boog.

 

There are a few other things also, but unless you have the knowledge and test equipment, it would be useless for me to start listing everything.

  

 

[Breakwater Bouy]

good info Way2slow

[Bass Turd]

Look for the simplest answer first. An air leak in a fuel line will act like this.

[TOXIC]

13 hours ago, Bass Turd said:

Look for the simplest answer first. An air leak in a fuel line will act like this.

Exactly.  or a bad bulb.  First run the boat on a remote tank (on the lake under load) that will tell you that:

1, It's not fuel quality related

2, It's not fuel line Related

 

If it runs like a champ, you have a problem with your fuel or lines.

 

If it still acts up, you have a problem on the motor side.  

[crypt]

had my XP do the same thing,was the clip from the timing advance rod that had come off. used braided line to get back to the dock. worked great till I got it fixed proper.

[Brent Christian]

try having someone pump your primer bulb when it does it see if it helps it any

[Breakwater Bouy]

any update? I'm just curious to know what progress was made with the troubleshooting