1991 2.5 200 mariner

[freeman]

im trying to figure out what motor i have.it is suppose to be a 1991 2.5 200 mariner,but some questions have poped up.it has exhaust relief notches and it has 7 petal reeds.can anyone help me please

[TheRickster]

1991 was the year for the 7 petal reed fishing 200 2.5L.. They are hard to find these days and make great motors.. A little chest cleaning and some 145psi heads and add a 255ProMax ECU and you have a 225PM in sheeps clothing..

Rick

[freeman]

did they have the exhaust reliefs in the sleeves

[freeman]

also mine is carbuerated

[K-Dawg]

I have a 1991 200 it has 7 petal reeds and exhaust relief in the ports. Sounds like you have a 1991 200 to me.

[HStream1]

The 91 200 did have the 7 petal front and was made for one year only. Does yours have the water cooled regulator?

Serial #'s OC291520 thru OD081999.

[mrcrsr]

sounds like a 91, for an all out engine i wouldn't waste money on that block w/ the exhaust reliefs, find a newer block and use all your other parts on it, be careful to, some of the early 2.5/200's were bottom guided and had different rods and pistons

[T-REX]

My XRI didnot have reliefs in tha sleeves, but tha carb motas did(at leest the one I had did)...

People holler about how tha reliefs mota's are junk, but IMO thats BS...Yea, that lil slot will take away a lil compression(and I meen LIL) but I have built relief motas that run juss az good az a non relief mota!!....Unless U are race'in tha mota, and are try'in to git 110% out ov it, thoze slots actually make tha mota a lil more user frenly, and a better idler...JMO

[mrcrsr]

My XRI didnot have reliefs in tha sleeves, but tha carb motas did(at leest the one I had did)...

People holler about how tha reliefs mota's are junk, but IMO thats BS...Yea, that lil slot will take away a lil compression(and I meen LIL) but I have built relief motas that run juss az good az a non relief mota!!....Unless U are race'in tha mota, and are try'in to git 110% out ov it, thoze slots actually make tha mota a lil more user frenly, and a better idler...JMO

since when were you concerned about idle quality rex, lol!!!

[T-REX]

Well, I did put "River mota" in ther....Lol.........I do actually have sum stock mota's......Wher I live, It's 7 miles from tha land'in to tha Rexaminium, and prolly a mile and a half iz idle zone, so Idle iz kinna impotent on my ride boats....

Tha point I wuz try'in ta make wuz all them ole relief motas ya'll thro away, juss thro them my way!!.....

[wrechin2]

People holler about how tha reliefs mota's are junk, but IMO thats BS...Yea, that lil slot will take away a lil compression(and I meen LIL) but I have built relief motas that run juss az good az a non relief mota!!....Unless U are race'in tha mota, and are try'in to git 110% out ov it, thoze slots actually make tha mota a lil more user frenly, and a better idler...JMO

I have built a few of them and for a bass boat, they run great.

[freeman]

thanks for the feed back.it is a bottom guided motor.it just needs a piston,the cylinders look good i just didnt want to end up with a rebuilt 150 or 175.i feel confident its a 200.ill pick up a little compression with some head work.any other performance tips would be greatly appreciated

[wrechin2]

A 91 was a bottom guided engine.There are plenty of performance tips...Just depends on how far you want to go. You could port to a 245 and add 245 carbs and make it a 245 carb engine. It will have idle reliefs and is not that big of a deal. You have a PM....

[freeman]

it does have a watercooled regulator

[freeman]

how do i get the port specs and pictures of where to port