what size head gaskets

[redsnapper386]

guys 1993 v6 2.5 200 carbs after rebuild i discovered my heads maybe shaved too much so could i go to a thicker head gasket and what size now useing stock size comp nos are 135 to 142 range all cylinders thanks for advice

[OnPad]

Perfect.

[PanRonnie]

Or you could install new heads!

[25two.stroke]

27-8228441
Thats the 1.2 mm head gasket.
But...you may already have that on your engine. Your compression numbers are not too high for 91 octane. If you are worried about it then turn the timing down to 23 btdc on cylinder #1. You will be good.

[PanRonnie]

promax 225 heads with 1 mm gasket

[mach351]

They made a 1.5mm gasket also. Pretty hard to find nowadays. It would lower you a bit, but probably not worth the search effort.

[Dave Strong]

With those compression numbers should be fine running 91-93 premium fuel.

Dave

[25two.stroke]

Yes. 1.5 mm head gasket is 27-840322 and they are backordered from mercury rn.

[redsnapper386]

Yes. 1.5 mm head gasket is 27-840322 and they are backordered from mercury rn.

thanks guys my problem is the starter barley turns the motor over when cold thought i would try thicker gaskets thanks to all

[OnPad]

I would think a healthy starter and battery, would spin that engine over no problem. I know my 2.5 at 130lbs, in sub freezing weather, has no problems, even with a group 24 battery.
I have stock heads if you want to trade.

[Dave Strong]

Sounds like you have a starter, battery, or voltage drop issue. nothing to do with compression.

Dave

[25two.stroke]

Yeah I start 180psi on 12v with a group 24 deep cycle
...

[PanRonnie]

Funny thing even the promax powerheads are now pictured with the diverters
Part 38 = 2 pieces of 1,5 inches and 2 pieces of 1,25 inches

[redsnapper386]

thanks again guys batterys are new all 12 volt stuff new im useing 2 batterys for stating but at times the starter drags a little then kicks in will try another starter maybe buy new one cheers

[OnPad]

Could also be your solenoid.