So I picked up a couple of t2x powerheads

**Gmcviper** · 08-07-2017, 08:42 PM

Looks very similar to my 1400 mod I did.

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**largecar91** · 08-08-2017, 07:23 AM

Originally Posted by mrcrsr

That's exactly what I need, but .015 over. I just ordered 1 from the dealer, worst case it's 20% to send it back

All mine would be standard bore. I do have a new in box 150 piston that is .015

**mrcrsr** · 08-08-2017, 07:53 AM

Originally Posted by largecar91

All mine would be standard bore. I do have a new in box 150 piston that is .015

I appreciate it. I have one cylinder that already measures .006 over book spec, and 2 others that are .002 over so I don't have much choice but to bore it. Wiseco starts at .020 over, and then .010" increments.

**joyrider** · 08-08-2017, 05:16 PM

Mercury 115hp 73/74 were fitted with a non power ported 3 ring Hi comp pistons. Piston cast No 745 5208. It's all so correct that 90hp I6 also had same pistons. Merc Part No 745- 5220A1 NOS is replacement STD piston cast No 745- 4973 for Twisters & 650XS.
Attached is T2X Torque Specifications

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**joyrider** · 08-08-2017, 05:33 PM

Twister T2X Installation Doc

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**mrcrsr** · 08-08-2017, 05:34 PM

I tried to order pistons from Mercury using the original part number for the 1350(135 hp) inline from 1971. All the Piston numbers superceded to 1 part number that has the power port and notch. Seaway pulled one off the shelf for me and looked at it. Does anyone have a parts book for this engine?

**FMP** · 08-08-2017, 06:58 PM

So six new 0.020 without notch. Coated skirts? Nope I checked.

**mrcrsr** · 08-09-2017, 06:13 AM

It's apparently going to be a special order piston, the other guy I had spoken to was wrong, so I can probably have them coated. I believe the Pistons come anodized normally. I'm waiting for my machinist to check both blocks out first.

**Noah Burns** · 08-11-2017, 06:20 PM

what is an unassembled, T2X worth, just powerhead? I might have one in the garage...

**FUJIMO** · 08-11-2017, 07:26 PM

**FUJIMO** · 08-11-2017, 07:26 PM

**FUJIMO** · 08-11-2017, 07:27 PM

Originally Posted by Noah Burns

what is an unassembled, T2X worth, just powerhead? I might have one in the garage...

...Whatever someone is willing to pay.

**FUJIMO** · 08-11-2017, 07:29 PM

Originally Posted by mrcrsr

Does anyone have a parts book for this engine?

...I don't think one was ever produced from Mercury Hi-Performance, for the T2x.

**FMP** · 08-11-2017, 07:35 PM

162435

**Capt.Insane-o** · 08-11-2017, 08:09 PM

I don't have any oversize Charlie.. But somewhere in the dungeon is a 90 HP crank with 6 non ported pistons in fine shape. Whether they are notched I can't remember.