How to set the timing on a cross-flow?

[Melvin Hatcher]

I have a 1985 Evinrude XP150 that I would like to set / check the total timing.<br /><br />What is the best way for the home enthusiast / hobbyist to set the timing on a Cross-flow?<br /><br />Since I don't have a test wheel or a tank large enough house my engine. <br /><br />My backyard procedure is as follows.<br />I remove all the spark plugs, disconnect the timer base and spin the motor with the starter while holding the timer bast to full advance. <br /><br />With all the spark plugs removed the starter will spin the motor quite fast. I then monitor the spark with a timing light and adjust the timing accordingly to 28 BTDC.<br /><br />Is this method ok or should I keep the boat strapped to the trailer and back her in the water at a boat ramp and set it there. The only reason I have not used a boat ramp is bacause it's not that many around here that are not busy.

 

[Goodoleboy]

Re: How to set the timing on a cross-flow?

The best way is to check timeing on trailer at full throttle. If its to bussy then mabey try geting on ramp after dark. with a buddy along to handel controls.<br /><br />When your setting static timeing in drive way. It should be set at 4* less than what manual calls for.<br /><br />If it calls for 28* WOT then set at 24* the electronics make up the other four. <br /><br />Good luck!

 

[steamboatwilly]

Re: How to set the timing on a cross-flow?

I have a 89 GT 150 that I wanted to check time on this week.It has a 24Raker.It wouldnt turn much over 3000rpm while being restrained on the trailer.I read that somebody said it need to be untied.At 3000,tied up,mine sparked at 20*BTDC.I dont know if this helps or not,it might.

 

[walleyehed]

Re: How to set the timing on a cross-flow?

As a wise-man once said; whatever your max advance is on that V6, set the static timing at 4 degs. retarded from that point.<br />Example: If max timing is to be at 28, set it at 24 with the starter.<br />Joe Reeves and Dhadley are the wise-men....