Re: 1990 rude 120
timing is a important thing and needs to be exact. you need to check top dead center of your #1 piston and make sure your timing arrow is properly lined up. then remove all spark plugs and I put the plugs back in the wire and lay them on the engine block so they can spark, this will avoid possible electronics damage. I connect a spark gap tester to the #1 plug wire. then if you have quick start you have to ground out the wire going to the head sensor, next to the tan wire..maybe it is black and white striped. this will disable quick start. you then tunr the engine over and shoot it with the timing light and set idle timing..should be around 4 ADTC, you can later adjust this timing for best idle with engine running. ( you have to subtract 4 degrees when doing your timing static like this so 4 degrees ATDC idle should be set to 8 ATDC, and 18 degrees BTDC timing should be set to 14 BTDC) now disconnect throttle cable and move throttle manually to WOT position. set timing to desired setting. you should double check your timing settings while running down the river. again, timing is crucial.
