How do I time a Suzuki?

[widespread]

I have a 1991 Suzuki (50 hp Cabrea) and I need to know how to set the timing. I do not necessarily need to time it exactly, just be able to adjust to determine if that is the reason it is not running correctly. I have experience with timing 4-cycle engines but I can't seem to figure out exactly what to push or pull to adjust the timing on a 2-cycle? And advice and/or comments are greatly appreciated.

 

[kev_79]

Re: How do I time a Suzuki?

should be a lever that connects to throttle cable and maybe linkage that controls carbs. That adjusts the timing, and you should have two screws, one for idle, and one for WOT. The marks should be on the flywheel. Good Luck. <br /><br />BTW, Since no belts, cams, etc, 2 strokes rarely get out of time, unless timing screws are loose, or messed with. Timing is rarely the prob if somone hasn't messed with it.

 

[widespread]

Re: How do I time a Suzuki?

Well, maybe you can help me trouble shoot what is happening assuming it is not out of time. The motor will fire if we spray carb cleaner in the throttle body. It will continue to run at high RPM or if we nurse it by continuing to spray carb cleaner into the throttle body. Why is this happening? We think we have narrowed the problems to carb or timing but decided ultimately on timing because we figured that the spraying of the carb cleaner was delaying the firing of the fuel in the piston and causing it to run. Additionally, the motor is making a "backfire" noise and dying.

 

[kev_79]

Re: How do I time a Suzuki?

Well, if you have a timing light, go ahead and check it. Top cylinder is no. 1, But don't know the specs. BTW, on an outboard, you check the timing in gear, so you will need to make a jumper to bypass the neutral safety switch. I would guess about 2-4 degrees BTDC at idle around 500-700 rpm in gear. WOT somthing around 20-23 BTDC. If timing is making your symtoms, it will be off pretty badly, I would think, so you can use these as a benchmark. Your suzi dealer can give you the specs if you call them. <br /><br />Things I would check first are, are the carbs in sync?(if has 2,3) Is the primer bulb firm when running? Sounds like it's not gettting fuel, personally, I would take, at least, the bowl(s) off the carb(s) and spray with power tune or sea foam. Make sure float(s) not stuck. Gasket sets for carbs are really cheap, and you can probably do it yourself. I would do this, if it hasn't been done lately, reguardless. Check this stuff, find out what you can, and if no fix, come back, we'll get it strait.

 

[widespread]

Re: How do I time a Suzuki?

To be honest you are talking over my head. However, I do remember that when we originally got the motor to fire a few weeks ago I drained the fuel out of the carbs with the little adjustment screws on the side (the original owner said that would be necessary to get the bad gas out of the carbs). Is it possible that we are having problems because those screws weren't screwed back in to the correct position?

 

[Yepblaze]

Re: How do I time a Suzuki?

On my old 79 DT50 there are no manually set timing adjustments as it is all controlled electronically and the throttle only activates the throttle butterflies. Other than a flywheel key becoming partially sheared or the ignition control box being defective would the timing become incorrect at all. probably if the control box went out it would not run or spark at all. Sounds like you might need to take carbs off and clean them well including the main jets and the emulsion tubes above the main jets.

 

[suzukidave]

Re: How do I time a Suzuki?

I have a 1989 55hp suzuki 2 cyl that did acted similar. Solution was I forgot to replace the o ring in the fuel filter when I cleaned it out and it was sucking air in. May not be that but I bet it's a fuel problem.<br /><br />Also, on timing, I don't know if your motor is same as mine but my suzuki dealer has told me mine is mechanical advance and basically timing can't go wrong unless I mess with it so I don't.