setting timing

hookedonjc

Petty Officer 2nd Class
Joined
Dec 27, 2003
Messages
156
Hey guys <br /> I belive I have figured out my problem of not planing off. Now that I think about it I went through the procedure in the manual on setting all the linkage and I made an adjustment on the advance timming screw so now I got to get a timing light to get it right. What I need to know is do I have to have a test prop to set this and it wasent clear if the engine had to be in gear or can I set this with just using the warm up lever to achieve the rpms needed? If I need to have it in gear can I do this in drum without the prop or do I need to get the test prop?<br />Thanks <br />Hooked
 

OBJ

Supreme Mariner
Joined
Dec 27, 2002
Messages
10,161
Re: setting timing

Hooked....if ya' don't have a dino or test prop, the only way is to put her on the water at WOT and use the timing light. There is another way but I gotta go find it. BRB.<br /><br />OK...Joe Reeeves posted this and should work for you.<br /><br />The full spark advance can be adjusted without have the engine running at near full throttle as follows. <br /><br />To set the timing on that engine, have the s/plugs out, and have the throttle at full, set that timer base under the flywheel tight against the rubber stop on the end of the full spark timer advance stop screw (wire it against that stop if necessary). <br /><br />Rig a spark tester and have the spark gap set to 7/16". Hook up the timing light to the #1 plug wire. Crank the engine over and set the spark advance to 4° less than what the engine calls for. <br /><br />I don't know the full spark advance setting your engine calls for, but to pick a figure, say your engine calls for 28°, set the timing at 24°. The reasoning for the 4° difference is that when the engine is actually running, due to the nature of the solid state ignition componets, the engine gains the extra 4°. <br /><br />If you set the engine to its true setting at cranking speed, when running it will advance beyond its limit by 4° which will set up pre-ignition causing guaranteed piston damage! You don't want that to take place. <br /><br />No need to be concerned about the idle timing as that will take care of itself. The main concern is the full advance setting. <br /><br />Be sure to use your own engines spark advance settings, not the one I picked out of the air here in my notes.<br /><br />Hope this helps.
 
Top