1994 Evinrude 150 Intruder E150GLERV Carb Jets

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MLevi

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I am looking for the factory installed jet size in a 1994 Evinrude 150 Intruder. I have an OMC service manual but no jetting was listed in the engine specs. The power head was overhauled before I purchased it and the engine is not as strong on top as I would expect. Also it has a stumble/stall if the throttle is opened quickly from mid RPM range of 3k-4k. No stumble when quickly opening throttle from idle. It's my understanding that if the cylinders are oversized during a rebuild sometimes the jetting requires some richening. The current intermediate air jets are a 38, I have not pulled the high speed fuel jets to see. Any direction to a listing or comments would be greatly appreciated.
BTW I have done a complete link & synch as well as verify timing.
Thanks
 
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Dhadley

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Re: 1994 Evinrude 150 Intruder E150GLERV Carb Jets

No rejetting is required even if your motor was bored. Start with the basics, that's a very good motor.
 
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Faztbullet

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Re: 1994 Evinrude 150 Intruder E150GLERV Carb Jets

The stock high speeds are 70Das its a GLV series engine. How much oversize is engine as stock jets are good to .020 oversize. How did you set/check timing? Did you borrow a tool or have dealer set it?
 
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MLevi

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Re: 1994 Evinrude 150 Intruder E150GLERV Carb Jets

I used an ignition analyzer to check timing which was dead on at 6 degrees atcd idle and 20 btdc full throttle. Before I tear into jetting changes I plan on follow fuel system t/s step by step to verify no air entry, no restrictions, etc.
 
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MLevi

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Re: 1994 Evinrude 150 Intruder E150GLERV Carb Jets

One thing to add. I can get 5200 RPM from the motor. 17 pitch prop on a Princecraft 186 superpro. But this happens just before WOT, approx 7/8. If i put it wide open from there I get a slight RPM decrease (100) and more carb howl noise.
I am more concerned about the slight stall when opening the throttle from a mid RPM cruise speed. Thanks again
 
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emdsapmgr

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Re: 1994 Evinrude 150 Intruder E150GLERV Carb Jets

If you get a slight rpm decrease at full throttle, typically that means the carbs are overfueling.
 
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MLevi

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Re: 1994 Evinrude 150 Intruder E150GLERV Carb Jets

Overfuel would make sense. I did bump the choke while near WOT and it made things worse. The air intake cover is completely clear. Nothing looks out of place. I also plan to do a read on the spark plugs after a WOT run.
 
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emdsapmgr

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Re: 1994 Evinrude 150 Intruder E150GLERV Carb Jets

The 150Gl model is the high performance 150. It has mostly 175 parts, including heads and carbs. The 150GL main jets are .070 same as the 175. You say you have 150GL carbs-is that because the engine itself is a 150GL model, or were the carbs a transplant from a GL model to your 150? That could explain part of the problem. Also, a 150GL must have the 175 heads-check your engine to be sure the heads are part number 338311. If you have lower compressison 337548 heads, that could also explain some of the problem.
 
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MLevi

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Re: 1994 Evinrude 150 Intruder E150GLERV Carb Jets

The only thing I know for certain is the model off the tag which was E150GLERV and it had 38 air jets in the carbs.
 
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emdsapmgr

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Re: 1994 Evinrude 150 Intruder E150GLERV Carb Jets

Why not pull one of the main jets out of the carb bowl to verify the jet size?
 
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MLevi

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Re: 1994 Evinrude 150 Intruder E150GLERV Carb Jets

Yes, tonight. Sorry I did not type a complet thought process.
I will check both mains and carb numbers to verify all is as it should be. If everything checks - right jets, carbs, good read on the spark plugs, etc, best bet may be run it into local dealer so they can run it in the test tank and diagnose.
 
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Re: 1994 Evinrude 150 Intruder E150GLERV Carb Jets

99% of the Intruders/Faststrike have the 311 heads, the 548 heads are used on the El series (cowling just has 150 on it and smaller carbs) and has a 1/4-20 water fitting as the 311's has a 1/8
 
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MLevi

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Re: 1994 Evinrude 150 Intruder E150GLERV Carb Jets

Thanks all for the knowledge. Heads are correct----311's. Main jets are however 74D. Substantially larger than factory. I'll do a WOT run and read plugs but am suspecting dropping back to 70's will make a substantial improvement. This would also make sense why the engine seems strong to 1/2 throttle then gradually gets worse. Thinking the rebuilder fattened the main jetting to insure there would not be a lean condition.
 
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emdsapmgr

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Re: 1994 Evinrude 150 Intruder E150GLERV Carb Jets

You can look at the factory parts lists for your engine on the factory website: epc.brp.com. You can locate your model and even print a nice hard copy for future reference. It's a handy reference if you plan to check all of the jet sizes.
 
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MLevi

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Re: 1994 Evinrude 150 Intruder E150GLERV Carb Jets

Before I go charging out and buying new jets at almost 10.00 a piece does anyone have six of the 70D jets # 0327769 that they would want to sell?
 
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