Mariner 75hp timing?

[Omcking]

Hey guys. I’ve got a Mariner 75hp serial number 0B125421 that I am working on the timing on. My question is what should the timing be at when it is idleing and when it is a Wot. Currently the timeing at an idle is roughly 3.5-4 degrees after tdc. If someone could give me some number to go off of that would be awesome I cannot find any information on the engine so coming here.

 

[racerone]

Fact , this is a 2 stroke engine and not a 283 small block chevy.----There is a specification for full throttle timing.------There is a specification for where the throttle plates open.----Where the timing is when engine actually idles smoothly does not matter and it looks after itself !

 

[Omcking]

Okay so I guess I need timing numbers for when the throttle plate crack open and when it full throttle. I currently have the engine running and it seems perfect but ya know I’d hate to melt a piston.

 

[racerone]

Timing just does not go out of adjustment by itself.

 

[Omcking]

I 100 percent agree but when your not paying attention in a hurry and accidentally turn the wrong screw then ya need to know the numbers.

 

[fastjeff]

Not sure what the max timing is for yours but you can set it correctly with a timing light IF you remove the carb linkage that is operated by the throttle. That allows you to hold her wide open (about 3,000 rpm) and adjust the timing correctly.

Jeff

 

[faztbullet]

Max timing....28° at cranking
Idle timing ….0°-4°BTDC
No pick up timing spec