Timing on a 1990 Evinrude 150

[pluedemann]

Well got my boat back from the shop and it still bogs off the line. 19 pitch on a 16 foot deep V. OK top end (5500). I checked the base timing and it is at 2 BTDC (1000 RPM) The cam that operates the throttle was approx 3/16 of an inch away from the the contact roller from the throttle cam. I have moved the roller so that it does contact. (It did when it was new.) The cam has 2 lines on it. Is it nessesary to line up with the roller? My manual is on the way but impatient to work on this engine. So what should be the timing on this engine at idle and at what idle speed.<br />Sorry if the part names are not correct<br />Thanks pluedemann@interbaun.com

 

[Jack Shellac]

Re: Timing on a 1990 Evinrude 150

Manual calls for 7 degrees at idle and 32 degrees maximum advance. Idle spec for this engine is 650 to 750 RPM. Welcome to the forum and good luck.

 

[pluedemann]

Re: Timing on a 1990 Evinrude 150

Thanks for the info. <br />I did forget to mention that this is an XP 150. Not sure if it makes any difference.<br />The flywheel is marked at 28 degrees with whiteout. <br />Is there a safe way to test the maximum advance?<br />I was going to pull the safety stop cord, put it in gear and put power directly to the starter.<br />I guesss I should at least take the prop off for that eh!

 

[pluedemann]

Re: Timing on a 1990 Evinrude 150

Ok Need some more help. I was able to get the timing to 7 degrees BTDC. The only problem is that the idle is even higher now. (1200 RPM) (In neutral)<br />I checked the butterflies and they are closed tight. I have the connection between the timing lever and the carbs disconnected. So there can be no linkage holding them open. <br />So what is the procedure to adjust the timing and the idle speed?<br />Thanks

 

[pluedemann]

Re: Timing on a 1990 Evinrude 150

Well I went through the timing procedure and this time it seems to work. <br />Here is what I did. <br />Started the engine and warmed it up. <br />Put in gear and pushed the throttle forward until the timing was at 7 degrees<br />Centered the mark on the throttle cam on the roller.<br />turned the engine off and tightened all the screws. <br />Pulled the throttle back into neutral.<br />Started the engine again and set the idle.<br />Double checked the timing and sync etc.<br />Is this the proper way to set the timing etc?<br />If anything this has been a learning experience which I enjoyed

 

[akudirka]

Re: Timing on a 1990 Evinrude 150

I'm an interested reader - You have described the same issue I'm having with my XP 150/which I beleive is a 60 deg motor. Did the adjustment you described fix you bogging starts?

 

[Dhadley]

Re: Timing on a 1990 Evinrude 150

No XP or GT was a 60 degree motor. 150 XP/GT's are crossflow V6's.<br /><br />We dont really pay that close attention to the actual timing on the idle side. Thats a good starting point and then we just adjust it for the best idle on the boat. Some motors sit lower in the water and have more backpressure.

 

[pluedemann]

Re: Timing on a 1990 Evinrude 150

I hope to have the boat out this coming weekend. I will let you know.<br />So the idle speed will change when I put the boat into the water?<br />What I do not understand is why that roller was in contact with the cam when the engine was new and now is not. Anyone know why?

 

[Duck Loads]

Re: Timing on a 1990 Evinrude 150

Are you sure the outer rubber cover on your throttle roller is intact? Mine came apart once leaving just the hard black plastic inner core.

 

[pluedemann]

Re: Timing on a 1990 Evinrude 150

Good question. Mine does not seem to have a rubber cover. Only the hard black plastic. Does the diameter change much as I do not recall having the rubber cover on it ever. Anyone have a picture of this roller intact with the rubber?

 

[Dhadley]

Re: Timing on a 1990 Evinrude 150

I think we're getting 60 degree loopers and 90 degree crossflows mixed up again.

 

[pluedemann]

Re: Timing on a 1990 Evinrude 150

Ok I know mine is a 90 degree crossflow. Not sure if the other fellows are or not

 

[pluedemann]

Re: Timing on a 1990 Evinrude 150

Just got back from vacation and the motor ran perfectly.<br />Thanks for the help

 

[pluedemann]

Re: Timing on a 1990 Evinrude 150

OK One more question. The maximum advance is set at 28. The mechanic claims he sets it there because of the poor quality fuel we have now days. <br />Is this correct? <br />Would I gain much by setting the timing to 32 degrees? <br />Would I notice if it was pinging, or would the motor just tear itself apart?

 

[Dhadley]

Re: Timing on a 1990 Evinrude 150

28 is pretty much standard for a crossflow. Some motors were made with different heads and carbs and called for more timing. <br /><br />If youre sure the carbs have never been swapped out or jetted leaner and your running the correct fuel and Champion plugs, cross reference the heads and adjust the timing to that combination. <br /><br />If your combination calls for 28 and you advance it to 32 it'll run like a scalded dog just before a piston revolts. If youre lugging the motor you dont want to run more timing either.

 

[spucky]

Re: Timing on a 1990 Evinrude 150

DHadley correctly describes the results of over advancing a crossflow. I did this in early June to a 90 HP 1988 Evinrude. New wiesco's, after an hour or so of running easy, opened it up for about 10 seconds, RPM was ballistic, no tach, heard what sounded like detonation. Pulled back on the throttle and siezed. Started back up after 30 seconds, limped back to the ramp. Did a compresion test, 3 120's and a 60. Disassembled it that night thinking a carb problem but it was apparent the other 3 cly were on the verge of the same thing. Cross hatch was shiny at 90 deg to wrist pin, oil was cooked on combustion chambers. Checked timing next time, 33 deg.

 

[pluedemann]

Re: Timing on a 1990 Evinrude 150

The reason I asked is that the manual calls for 32 degrees plus or minus 1 on my engine. <br />I have owned the engine since new and it never has had any carb work done on it. I have had the heads milled as they had a slight warp to them.<br /> <br />Dhadley, not sure what you mean by "cross reference the heads and adjust the timing to that combination"<br /><br />Spucky, my manual says your engines max advance timing was only 28 degrees.

 

[Dhadley]

Re: Timing on a 1990 Evinrude 150

Peter, if youve had the heads milled and its living at 28 degrees I'd suggest leaving it there. <br /><br />By cross referencing I mean check the casting numbers to make sure which heads you have.

 

[pluedemann]

Re: Timing on a 1990 Evinrude 150

I will go with your recommendation. <br />One last questio. Would like to add a water pressure guage to the engine so that I can monitor it. <br />Where does it tie into on the engine?<br />Thanks

 

[Dhadley]

Re: Timing on a 1990 Evinrude 150

On a crossflow you T into the overboard indicator (pisser) hose. Excellent idea!