Timing after disconnecting oil injection

[20vector]

hello all, i have a 98 mariner 200efi, i've disconnected the oil injection about 10 months ago. I've noticed everytime i try to crank it up after sitting few days now that i have to have throttle half way to get it to start, then when it starts i have to back throttle up pretty quick. its mainly the first start of the day. I have new spark plugs. I was wondering if after disconnecting oil injection i need to adjust timing or if something else is happening. ** Another big question i have is: My motor came with a Detonation sensor and module, the one that advances ignition timing 6? at high speed if detonation is not present. ---------------------------------------------
I disconnected Detonation sensor and module, and idle stabilizer module while i was disconnecting oil injection... My question is : If i dont have detonation sensor and module anymore do i have to change where i set my timing at ? I set my timing at cranking speed. According to MERCURY REPAIR MANUAL, max timing while cranking speed is 16? BTDC , max timing running at W.O.T. is 22? BTDC ,; and IDLE TIMING is 0? - 9? ATDC . With this being said, where should i SET MY TIMING AT while at cranking speed now? What is worst for a motor to have timing advanced to much or to be retarded to much ? Was just wondering cause my timing been set at 16? BTDC with cranking speed for max timing , Before and after removal of detonation sensor module ? Thanks so much in advance...

 

[Dukedog]

Re: Timing after disconnecting oil injection

After removin' all tha "junk" (detonation, idle stablizer modules) set MAX at 23* crankin' after doing tha TDC procedure in case tha pointer needs some tweakin'. May/may not need to move it but its always a good thing to check it. Set idle timin' in tha water, in gear......

 

[20vector]

Re: Timing after disconnecting oil injection

Thanks for your help. Got another question that i'm pretty sure on but just want to make sure. After i set MAX at 23? BTDC @ cranking speed, What will my Running at W.O.T. timing be at? Again thanks for the help.

 

[wired247]

Re: Timing after disconnecting oil injection

It will be 23 degrees. I always verify mine on the water and with the V6's it stays where you set it in the garage crankiing it.

Not like Johnsons.

 

[Dukedog]

Re: Timing after disconnecting oil injection

On that motor with all tha stuff pulled off it will be close ta 25* at wfo................Which all will be fine with good gas and as long as your not makin' 150lbs or more of compression.......

 

[20vector]

Re: Timing after disconnecting oil injection

yeah my compression is at 120lbs on all 6. So should i set it at 25? or at 23? ? Another question is if i'm off a little bit on TIMING like being instead of 23? i have it at 25?, is this better than being off other way like instead of 23? i have it set at 20? ?

 

[ajgraz]

Re: Timing after disconnecting oil injection

You are safer setting less spark advance. So if the spec is 23 BTDC, you are safer at 20 BTDC and less safe at 25 BTDC. You will lose a little power at 20 BTDC, but at overly-advanced timing you could lose a piston.

 

[wired247]

Re: Timing after disconnecting oil injection

yeah my compression is at 120lbs on all 6. So should i set it at 25? or at 23? ? Another question is if i'm off a little bit on TIMING like being instead of 23? i have it at 25?, is this better than being off other way like instead of 23? i have it set at 20? ?

It would run like crap at 20 degrees. 23 degrees at WOT cranking speed with 120 lbs compression on 89 or better octane will run just fine. Ive got higher compression that that an run mine at 23 at WOT cranking and before I had the heads milled at was in the 115 psi range. Pistons looked clean and like new on top when I pulled the heads to get them milled ( twice ) to get the compression up to 140 ish. My cranking and WOT timing were almost exactly the same at cranking and high speed after I pulled that stupid timing module and rev limiter off.

Unless you are milling your heads 23 degrees isnt going to hurt anything even if you are using cheap gas.

 

[20vector]

Re: Timing after disconnecting oil injection

ok guys i checked my timing. Max timing was ok. actually was at 22? and made it 23? . Some how my idle timing was off. it was at like 3? or 4? BTDC. Made it 4? ATDC for time being until i can get it back in water to reset it while in gear. While i had plugs out and hooked to spark tested i decided to check for strong spark, done it before while ago and was jumping little over 1/2" strong. When i did air gap spark test this time would only get real strong spark with tester set at 1/4" . With it set at little over 1/2", it just wasnt getting good spark at all. On some cylinders at that gap wasn't getting spark at all. With real strong , crisp spark at 1/4" will that be good enought ?

 

[Dukedog]

Re: Timing after disconnecting oil injection

What plugs ya got in it? Take it out and run it. You've had it long enough ta know how its supposed ta run..........

 

[20vector]

Re: Timing after disconnecting oil injection

plugs are NGK BU8H . Yeah few weeks ago last time i was out in it ran great after it got going everytime. Bogging issue was acting up on take off around 2500 rpm but when got going ran great.