Port map.

[thornl01]

Does anyone out there have a factory port map for a FR19s that you could share ?

Need a good baseline on where to start on a 49" .

Thanks

lawrence Thornton

Florence SC

[Jackson]

Iam75man :D

[ima75man]

Iam75man :D

tim kurtz, fast fred, smoking joe, there's alot of 3 cylinder omc gura on this site.........check out the fast fred mod-50 page...i'm just a shade tree omc rookie.. out

[thornl01]

Just learning how to decipher Fred's CODE language is hard enough.
Plenty of round about statements, but no info.
Just need a factory fr19 map, not someone's hard earned secrets.

LT

[ima75man]

Just learning how to decipher Fred's CODE language is hard enough.
Plenty of round about statements, but no info.
Just need a factory fr19 map, not someone's hard earned secrets.

LT

phil mc-daniel he has pistons made for the omc 3 cylinder,i'm sure he knows everything you need to build a mod 50 type powerhead.....

[Fast Fred]

one and a half inches from the top of the deck.:cool: sweep it out like a power valve, like the top of the port on a 75hp only way more.

[Mark75H]

Power valve? I think you are using the wrong term again

[Fast Fred]

um, no, it's not straight out, it's swept . like a closed power valve, for sure:cool:

[Mark75H]

still doesn't make sense ... a closed power valve?

[Fast Fred]

um, ok then. the port map does not show it, but you can make it a straight out port, it will still make enuff low end foot pounds to get it on plain.

[Fast Fred]

funnel style maybe easier to understand, anyway the port on the cyl side is taller than the exit.

[Fast Fred]

port exit

[Fast Fred]

port entrance, ( this is not as the port map shows, it's Modified. but works the same)

[Fast Fred]

this is what the port Map wants it to look like.

[Fast Fred]

i payed for a copy of the port map some years ago, you can buy a copy from me if you would like.:):cool:

[ima75man]

i payed for a copy of the port map some years ago, you can buy a copy from me if you would like.:):cool:

speed cost,how fast you want to go.. freddie,pm me let me know how much for the top secret port map.. i'm saving my lunch money..............out

[Fast Fred]

anyway, the cost is minimal and the agreement was it would not be given away when i payed for it. she'll peak at about 5100 rpms and carry the horse power to 7800 then start to fall off but not a hard fall, 95hp. if you read the the the thred it's in there.

[ima75man]

anyway, the cost is minimal and the agreement was it would not be given away when i payed for it. She'll peak at about 5100 rpms and carry the horse power to 7800 then start to fall off but not a hard fall, 95hp. If you read the the the thred it's in there.
Not sure what mark's malfunction is but i don't fix ac, i fix boats all day, every day, beggin must mean the same as payin cash.:eek:

freddie, i feel your pain,you sure helped me out.. More times than i can count. We can always do facebook.lol

[Fast Fred]

lawrence, my Name is Fredrick Sherman, you can find me on facebook, i can't give you that map, but they didn't say how much i had to charge so for a dollar and a stamped envelope with your return add you can have it.

[Mark75H]

What I'm saying is that you have asked for lots of details over the years and have received many answers without paying for them.

You have used the forum for free for years.


No one is asking you to reveal secrets that you have discovered by your own trial and error grinding and testing or to borrow your boat, motor or prop.

Couldn't you be a pal and reciprocate a little?

What makes the forum work is people sharing

[ima75man]

lawrence, my Name is Fredrick Sherman, you can find me on facebook, i can't give you that map, but they didn't say how much i had to charge so for a dollar and a stamped envelope with your return add you can have it.

freddie, i'll send you a check and and a stamped envelope.. never know when i'll need another mod 50....the map would come in handy................. thanks again...............

[Fast Fred]

anyway, best to modavate not alienate:cool: do you see how the power valve relates?

[Mark75H]

No, I'm still lost on the power valve relation :confused::confused:

[Fast Fred]

power valve, forces the exhaust to blow down and out a lower port hight, this make more low end power.
not lookin for more low end on the outboard, but keepin some or most of what is there and still gettin the high port, you want to chanfur the top of the port so she blows down and out
this will help keep the power band from bein peaky. you follow?:cool:

[88workcar]

Finger ports are added, you must drill a hole in the piston to match it.
Oh, don't worry about the money......

[ima75man]

Finger ports are added, you must drill a hole in the piston to match it.
Oh, don't worry about the money......
i think this map works on hydros with quickee lower unit.the mod 50 powerhead wasn't design to run v-bottoms...i've wasted alot of money trying,easy way to more power,just bolt on a stock 56 in. omc. powerhead.. this works...