oil injection

[hobbymad]

Hello everyone i will be deleting the oil injection on my 200 merc 1987mdl and need to know from people who have done this
1-what preemix ratio will be best, 2- will any carby jetting or adjustments be required, 3-will i need to change the ignition timing? the comps on my powerhead are all130psi , also i would like to know if there are any modifications i can do to make it sound and run quicker? any help would be great thank you

[25two.stroke]

50:1
No carb jetting changes for oil injection.
No timing changes, just get rid of the stabilizer module and set the timing per the manual.

Lots of things make those motors quicker...it depends on how much time and money you wanna spend.

[Dave Strong]

If your running over 6500 to 7k for extended time 40:1, much over 7500 best go 32:1.

Dave

[rgsauger]

Yep, under 6K, 50:1. Over 6K, 40:1

Ditch your black boxes, too

[hobbymad]

Thanks for your help Dave

[hobbymad]

Appreciate your help thanks

[hobbymad]

Yep, under 6K, 50:1. Over 6K, 40:1

Ditch your black boxes, too

thanks very much and is there any avaliable info on removing the black boxes ? wiring etc.

[hobbymad]

50:1
No carb jetting changes for oil injection.
No timing changes, just get rid of the stabilizer module and set the timing per the manual.

Lots of things make those motors quicker...it depends on how much time and money you wanna spend.

hi im going to fit composite reed valves and will like to do any exhaust mods if anyone knows of any exhaust mods that work? thanks again

[DB150]

hobbymad
I just recently removed oil injection, alarm module, and idle stabilizer on my 1984 150 black max. I researched many Scream & Fly posts, all combined in my description. Follow the link and see step 15

https://www.screamandfly.com/showthr...ection-removal

[rock]

That link will give you all the info you need.

Rock

[rgsauger]

By the way, welcome to Scream and Fly!

[hobbymad]

By the way, welcome to Scream and Fly!

Thank you and there’s one thing bothering me about removing the black box on port side as there is 5 or 6 wires coming out of it so what do you do with those wires ? I know everyone says get rid of the black box but do you remove the wires from cdi box and throw the black box out with all wires or do some wires need be joined somewhere?? My engine is 1997 200 black max, so far I’ve been given great information that’s helping me out but I’m very cautious about removing wiring as I don’t want cause anything to fry?

[rprinzo]

not a whole lot you can do to add power without tearin it down and doin alot of exhaust port work and rebuild. ask me how i know,lol

[rgsauger]

Thank you and there’s one thing bothering me about removing the black box on port side as there is 5 or 6 wires coming out of it so what do you do with those wires ? I know everyone says get rid of the black box but do you remove the wires from cdi box and throw the black box out with all wires or do some wires need be joined somewhere?? My engine is 1997 200 black max, so far I’ve been given great information that’s helping me out but I’m very cautious about removing wiring as I don’t want cause anything to fry?

Search "black boxes" and you'll find what to do. The only main thing to keep in mind is that there will need to be a "bias" wire connecting the two switchboxes on the Starboard side. It might already be there. If not, it has to have it when you ditch the boxes. I think it's white w/ black by memory.

[hobbymad]

Search "black boxes" and you'll find what to do. The only main thing to keep in mind is that there will need to be a "bias" wire connecting the two switchboxes on the Starboard side. It might already be there. If not, it has to have it when you ditch the boxes. I think it's white w/ black by memory.

Thanks for your help