2.4 on offshore mid cooling

[R.I.P.]

I have an ridge back offshore mid . Im putting a 1986 2.4 200 black max power head on.
My question is its a single plate mid , so do I need to make any mods for 2.4 water cooling system popit valve and so on .

[transomstand]

Keep the 2 piece plate if you can. Those mismatches can be a real headache sometimes.

[R.I.P.]

Keep the 2 piece plate if you can. Those mismatches can be a real headache sometimes.

Well I don't have the two piece . What should I look to do .
Do I need to put in a bypass for
the pupit valve and do double discharge

[coslanzetta]

i had the same setup your lookn to do for years with no issues..put the power head on as is dont remove the popet and i had gutted tstats ,,,also drilled out the holes to 3/8 on the adapter...good luck..

[b0atguy]

I have an ridge back offshore mid . Im putting a 1986 2.4 200 black max power head on.
My question is its a single plate mid , so do I need to make any mods for 2.4 water cooling system popit valve and so on .

I am just the opposite, running a Bridgeport EFI on a 2 piece plate. I am fighting some minor low water pressure issues at idle.
If you want to trade your 1 piece plate for my 2 piece let me know...........it will make both of our motors happier!
BTW, mine is a 200hp 2 piece with a stock 200 tuner. We can both still keep our own mids too, we can just swap plates if you are interested.
Thanks,
b0atguy

[pyro]

In boatguy's case, doing what I did (using a race motor cowl and pan) blocks off the poppet dump passage, which is only used on the fishin' motor.

If my assumption is correct, the plate RIP has does not have those poppet dump passages cast into it, and here lies the problem...

[custom1skier]

Well I don't have the two piece . What should I look to do .
Do I need to put in a bypass for
the pupit valve and do double discharge

I have a 200/2.4 that I put on a offshore mid and 1 piece adapter. I blocked off the popit valve, did the dual dump, gutted the thermastats and inserted the fender washer(leaving the 1/8" hole to help with low water presure at idle) pulled the heads and insetalled 3/8" hose between the cylinder walls and case to redirect waterflow. I think it was Captain Insan-o that helped me with it. I have had 0 isues and have been running it for about 4 years now!

Lou

[patchesII]

I have a 200/2.4 that I put on a offshore mid and 1 piece adapter. I blocked off the popit valve, did the dual dump, gutted the thermastats and inserted the fender washer(leaving the 1/8" hole to help with low water presure at idle) pulled the heads and insetalled 3/8" hose between the cylinder walls and case to redirect waterflow. I think it was Captain Insan-o that helped me with it. I have had 0 isues and have been running it for about 4 years now!

Lou

I know plenty who have done this with no problems

[R.I.P.]

So by replaceing the thermastates with a 1/8 fender washers and pull the heads for the hose . now It would be set up like a 260 cooling system right. what is the duel pump you are talking about. I may just find out soon enough when I start takeing her apart. . Thanks again Pyro you seem to know alot about this stuff.

[pyro]

So he just needs a 260-style poppet cover to hook up the second dump hose. Ok, makes sense.

[R.I.P.]

where can I get the 260 style popet cover?

[custom1skier]

So he just needs a 260-style poppet cover to hook up the second dump hose. Ok, makes sense.

No, I blocked it off. I have 1 tube draining from each thermastat housing.

I wish I could be of more assistance. If I had computer access I would look up my thread for you.

[pyro]

Same here. Poppet passage blocked off. I just have my thermostats teed together and coming out the driver's side.

[custom1skier]

Here's the link to the 3rd page of my thread! The info you are looking for should start there. I removed the popet valve and put a fitting in the hose that returned to the top of the motor to adapt my water pressure line to. I hope it helps! http://www.screamandfly.com/showthread.php?178927-2-4-200/page3

Lou

[R.I.P.]

So the popet is gutted and a hose from the cover will go the top of heads taped into a common line with duel discharge lines from the heads , haveing a T in a crossover line would this work ok. also the hoses you guys put in the heads are they just sitting their or drilled through the wall. I am looking at the pics are they acting like a blocking to force flow passage. This ****s crazy aint it. I love it . Who thought of this stuff.....

[custom1skier]

So the popet is gutted and a hose from the cover will go the top of heads taped into a common line with duel discharge lines from the heads , haveing a T in a crossover line would this work ok. also the hoses you guys put in the heads are they just sitting their or drilled through the wall. I am looking at the pics are they acting like a blocking to force flow passage. This ****s crazy aint it. I love it . Who thought of this stuff.....

Yes, gut the poppet.
Block off the hole in the poppet cover. You could use a metal or brass pipe plug.
(you will need to keep an eye on your water presure when you get it going. It might only read a couple pounds at idle but as long as it is peeing and you dont have heating issues you're fine).

Now to the diverters(hoses), go pick up some 3/8" fuel line.
You will need to wedge the hose in the water passage(as you see in the pic posted by captain insane-o on my thread). Cut pieces 3/16" shorter than the depth and install flush with the cylinder.
The purpose is to redirect water for even flow around the cylinders and avoid hot spots.

Its pretty simple once you get into it

[R.I.P.]

thx alot will do

[R.I.P.]

what is the torque# for the heads ?.

[blackvector]

36 ft lbs make sure you lubricate the threads and head of the bolt.

[custom1skier]

How did it go?

[T-REX]

I juss installed a stockie 225 promax on a 15" offshore mid, with a one piece plate....Left tha thermostats in for efi operation, and also left poppit...It haz tha stock 1/4" hose goin from the top ov tha block to the poppit cover...I also dumped tha exspell'd water off tha heds out tha back(to fill the 2 holes in tha back ov tha alien cowl....Only other thang I dun other than stock powerhed water route'in wuz tapp'd into the 1/4" line goin from top ov tha block to the poppit, and made a piss'r out ov it....without that, U won't see any water till thermostats open!!!.,.,.,,Tha one piece plate had pluges it it, and Drilled to 3/8"(az a artikle John Morales had on tha use ov one piece plates use in place ov tha 2 piece....I don't care for tha 1 piece plates for normal river use, but they will work!!

[R.I.P.]

im allmost their . I pulled the heads and they were very clean. new head gaskets and put in the 3/8 hoses like your pics showed. got washers and popet cover with drain from eagle1. when i opened up the popet it had no internals the small side had a hole the large side was casted blocked off.

[R.I.P.]

Ok its all together ans ran it in a bucket. I had to rev it up to get just a little water to flow out of the heads . I have the cross over hose still their .Should it be removed so each head drains on its own? is this common. A friend said i need to be moveing to feed water into lw pick up to feed pump. If this is so at a stand still I wouldnt have water flow?
washer is 1/8 hole and popet is blocked off with 3/8 hose to a reducer 1/8"..any ideas where to go with this before I piut it in the water.

[Reaction19]

raise idle mine idles high and is fine it will dump water when its in the water dont worry run that thing!

[R.I.P.]

im just not happy with the idel flow.

[RiceKiller]

Make that Thang i told u to Mike for runninig on the hose and all will be good. watch your temp and let it build some heat before you put your foot threw the bottom of the boat and you will be all good holler if you need me :D

[b0atguy]

im just not happy with the idel flow.

I am fighting the same issue, just reversed. BP on a 2-piece plate. I think that the fishin motors should run on a 2-piece, and race motors should run on a 1-piece. That would prob. solve both of our probs.
My offer still stands......... I will trade you my 2-piece, for your 1 piece. I will pay shipping both ways too.
Thats the only thing that would solve both our problems I think. We need to be running our powerheads on the proper plates.

b0atguy

[R.I.P.]

LOL No thanks it took to much to get this far...plus Im going to upgrade powerhead next season. Thank

[RiceKiller]

Mike if you need a 2.4 2 pice plat you got my number ill hook u up

[RiceKiller]

Boatguy ill see if i can find u a one pice plate

[R.I.P.]

the man is on it. im going to stick with one ice its on it and will stay. What is the largest hole washer could i go with and where could i pick up water pressure from ? top of starboard head where crossover was? or where 1/8 inch tube from original pick up is or was.

[racervboat]

I know plenty who have done this with no problems So im doing the same thing b/p efi on a one piece but my only difference is that the b/p I have has 6 steel sleeves in it will this be a problem with running to cold?

[Mrzip]

I have a couple 2 Piece Plate's If Needed.

[Merc 2.5]

I heard Jay say at one time it's the steel cyl that has the issues

Could b sumthin washer size could help with