
You are watching: How to set the timing on a mercury outboard motor
T
ticondo46Seaman Apprentice
JoinedJan 30, 2012Messages31
Re: Timing: how do I read my flywheel, and also other time questions?At idle, definitely do it through the propeller in the water. With just the muffs on, friend don"t have actually the same ago pressure top top the exhaust, and it would offer you a wrong reading.Don"t effort a WOT adjustment of preferably spark advance with the boat in the water however! at the an extremely least, you space going to obtain covered in splash, and at worst, you will certainly be climbing over the dock! I"m not specifically familiar through your exact form of motor, yet I would say the if nobody disturbed the original factory settings, you have to be OK for maximum spark advance once you"ve got the idle spark advancement right. Alternatively, you have the right to do a max spark development adjustment through the reduced unit in the water, yet the prop take away off. Simply blip the gas towards WOT, have actually somebody host the timing light to the marks and also check it out. Don"t store the motor at high RPM"s and no pack for anything an ext than a 2nd or so!Good luck.
C
Chris1956Supreme Mariner
JoinedMar 25, 2004Messages24,641
Re: Timing: just how do I read my flywheel, and other timing questions?Fish, The time marks left that zero is BTDC. Eliminate all spark plugs except #1 and also install these right into their plug wires and also ground them to the block. Now you can crank the engine to collection the timing, and it will not start. Girlfriend may collection idle and max spark advancement in this method in your driveway. Carb mixture adjustment demands to be done in the water, engine warm and in forward.32* max advance is a lot. Because I perform not recognize the year of that motor, it may or might not be right, or quiet recommended.

Re: Timing: exactly how do I read my flywheel, and also other timing questions?Thanks! That?s a great bit of details to help me out. I simply scanned the 3 pages out of mine shop hands-on which define timing adjustments and also specifications, in instance they will help any of you folks who room gracious sufficient to aid me understand the material.



C
Chris1956Supreme Mariner
JoinedMar 25, 2004Messages24,641
Re: Timing: just how do I read my flywheel, and also other time questions?With all spark plugs the end (remove prop), except for #1, advancement the throttle until the carbohydrate is just ready to open. Placed timing light v zro development set, crank motor and also read timing. The should match primary pickup spec. Change as specified.Advance throttle fully and inspect that carbs are all the way open. Crank motor and read max advance. I would use 30* BTDC together the spec, because I do not recognize why the time would readjust if the motor to be running.There need to be set screws for minimum idle (Idle stop), max spark development and max throttle. The actuator plate should rotate for adjusting primary pickup timing.

Re: Timing: how do I check out my flywheel, and other time questions?Thank friend Chris.I"m not certain why it would contact for 33* BTDC once cranked by starter motor but call because that 32* BTDC through engine running. Ns don"t recognize the actual guts of one engine well sufficient to know why that would certainly be specified by the Mercury company manual. I"m likewise in the dark on why 32* BTDC need to be provided to acquire 30* BTDC. I think it"s time for a new thread on the topic, and also maybe someone will be able to say why the digital timing attributes of this ignition mechanism require setup max breakthrough at 32* BTDC to attain 30* BTDC.
A
aussieflashLieutenant junior Grade
JoinedFeb 5, 2011Messages1,004
Re: Timing: how do I check out my flywheel, and also other timing questions?Your engine is a 1984 model.Spark advancement characteristics is the very same as my V6 1988.I didnt try to understand it....I simply did as I was told...lol.All my timing to be done in ~ cranking only...much easier.I couldnt imagine do the efforts to adjust max while engine in water???Is that even possible.
See more: Phoenix Arizona To Las Vegas Driving Time, Road Trip From Phoenix To Las Vegas
C
Chris1956Supreme Mariner
JoinedMar 25, 2004Messages24,641
Re: Timing: exactly how do I read my flywheel, and also other time questions?Aussie, i think his engine is lot older than 1984. I think it is so late 60s or at an early stage 70s.