OPTI FUEL RAIL adjustment

[wt3550]

Was wondering if there is anyone out there that knows how to adjust the screws on the port rail of a Opti without the diagnostic tool from Mercury
Heard it can be enriched to get a quicker response on hole shot

[2jz]

I would recommend playing with engine height ,fiberglass reeds, or different props. Adjustment to rail will give extra gas but engine will run rich from idle to limiter.and likey foul plugs out at idle speeds.

[wt3550]

OK Thanx

[R.grover]

What opti do you have? if you have a standard one then you could use the same hp rails with regs air and fuel injectors out of the xs model. But don't think you will get what you are after.

[wt3550]

I just heard through the grapevine that it was possible, and looking for someone that might know the answer
Thanx for your replt

[wt3550]

it's a 250 Pro XS

[2jz]

250pro xs not much u can do for it on your own it's already considered racing motor....... Google 250pro xs dbr racing upgrade. Guy on bass boat central did upgrade said holeshot was better but spent over 2k with i think 1mph gained