1984 Evinrude 150 XP

[JBFX4]

I have a 1984 Evinrude 150 that use to run fast and strong, I had a very in-depth tune up done on it and it has been in rough shape ever since. First, after running it wide open on plane it would just die, but then start right back up, second, after it starts and I give it throttle it bogs out and dies and now, in order to keep it running I need to prime the bulb continuously. Any ideas or comments???

 

[wilde1j]

Re: 1984 Evinrude 150 XP

Fuel starvation. Bad fuel pump, air leak on suction side of pump, tank not properly vented, etc. Carbs might also have some crap in them, but I'd bet on fuel starvation external to carbs. When did it run right last?<br /><br />BTW, what did your "very in-depth tuneup" consist of? There's almost nothing to adjust,maybe plugs and gear oil get changed, grease fittings greased.

 

[JBFX4]

Re: 1984 Evinrude 150 XP

This motor is werid it starts on the first crank usually, but when you give it trottle it does not have enough power to plane out then it bogs out and dies, but starts right back up. It last ran good in the spring of 05. The tune up according to the service place was whatever the manual suggested.

 

[gatorred]

Re: 1984 Evinrude 150 XP

i have a 1991 150 xp it's has stuff in gas for wintering it run's bad till gas is ran out i drain tank's and only leave a little in tank's i put 89 or higher at lest 10 gallon's each tank plus gas o klenser by cem-pe-co this treat's and clean's carb's to,mine call's for 89 plus 100-1 oil and fill oil injetion tank it run's good,if i don't have head problem's with me i have had a<br />relap's of old head injury on top of stroke.

 

[walleyehed]

Re: 1984 Evinrude 150 XP

JBFX4, if the main jets were plugged, the bulb would still hold firm.<br />That engine has 2 fuel pumps, I believe, and each pump is a bit different kit-wise.<br />This could be a vent issue or bad fuel as stated above, but if you have to go back and pump the bulb, either the engine pumps aren't working right, a clogged vent, or even a cracked fuel-line/loose connection.

 

[JBFX4]

Re: 1984 Evinrude 150 XP

I traced the fuel lines and have found that their are two points where fuel is dumped into the carbs, I unscrewed both of them and they had a screen like material (I am assuming) is some type of filter behind them when I went to put them back one screwed on tight but one seems to be stripped and very loose (I can wiggle it up and down and it will not tighten up) is it possible that air is being sucked in here as stated above? <br /><br />As far as running 89 octane, I normally do, I usually also add a bottle of carb cleaner during each fueling too.<br /><br />Thanks for the help guys…

 

[walleyehed]

Re: 1984 Evinrude 150 XP

Yes, that has to seal, and yes, it's likely pulling air and causing (could) a lean condition that, as you may know, could melt pistons...