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This is about what I have done to my 1996 250 EFI motor. The heads are cut to 300 ProMax specs by Black Magic Racing, 300 ProMax ECUs, mine came with 4 butterfly intake. I wish I would have had Simon...

Has anyone checked there head temperature while idling on a hose? I'm trying to figure out if I have a miss on one cylinder or not. Fished a few days ago and it seemed like I'm one cylinder down....

I believe when I did my link and sync that it was fully open at wide open throttle. But I'll confirm that again tomorrow. Thanks for the comment.

So I set my TPS to .95 with the key on and no throttle, but it is only 3.6V at full throttle. So I adjusted it so that full throttle is 4.0 volts as per the manual, but now the voltage with the key...

Figured out the TPS adjustments without the factory pigtail. On my motor it the 2 blue wires coming from the TPS.

So fixed the fuel pressure issue, cleaned the fuel pressure regulator and the screen. Now I have a constant 38 lbs of fuel pressure. Still working on the TPS adjustments.

Thought I would post up some positive feedback for Kenny at Black Magic Racing 804-761-7101, who just cut my Mercury heads. He got them on a Friday and finished and shipped out with UPS the following...

So I fired up a new to me 1996 Mercury 250 EFI (SERIAL 0G408397) for the first time. Previous owner disconnected the oil injection and it's set up for premix, so I have 50 to 1 in the fuel tank. New...

Thanks for the info. Just what I was looking for.

So read I through the announcements page, am I missing something or what. I listed serial numbers for both motors, I do not have models numbers. This is all the info I have.

So I'm not sure if my original lower unit had a stubby lower unit with driveshaft extension shaft or a 1 piece driveshaft, just that I have 13 splines on the motor. I found a fleetmaster lower unit...

I have 13 splines on my crank. The torquemaster I was looking at ended up being a modified fleetmaster. Still looking for a lower unit either way. Thanks for the comments.

I have a 1996 Mercury 250 EFI with a 25" shaft and a bad lower unit. Will a Gen 1 Torquemaster fit my motor?


So I'm not sure if my original lower unit had a stubby lower unit with driveshaft...

Ok, thanks for the info. I warmed up the motor, but didn't open the butterflies. I'll recheck and post what I find.

Butterflies were closed, do they need to be wide open? Did you notice a big difference with the ficht cages? I have Chris Carson reeds, but original reed cages.

I have 100 hours on a fresh rebuild and I'm getting 100 to 103 with the 335195 heads and idle reliefs plugged. I have checked it with 2 different compression gauges and my batteries are big bluetop...

I already have set of the 335195 heads on the motor. What compression are you getting on yours with the 335195 heads?

Thanks for the comments. I already got the last set that Al Stoker had shortly after he retired. I already posted up on scream and fly, no luck yet. I also talked to Sam Baker, but he has none left.

Hello to all,
I am looking for a set of high compression heads to bolt to my Johnson Faststrike 150 60 degree outboard motor. They are interchangeable between the Johnson Faststrike and Evinrude...