Merc 59 ci 60 block

[HGipson]

Back on the drawing board! Looking for some Answers to see if there is a difference in the 3 cyl 59ci 60 vs 40 blocks and some porting info for a play motor just to get a round about guess on what I'm looking at doing. Thanks for any answers !

[Fast Fred]

there is a difference in porting, 40 is not goin to go like a 60, port timin is Different.

[HGipson]

My 40 was done by Hydrotec it's running pretty good but I'm wanting to make this 60 block into a play motor for most hp I can get out of it. Can the 60 block be made out to be more or less than the 40 block or will they be about the same? Fig they had a little different ports but are the same everywhere else 59 ci

[Fast Fred]

i've known some who have tryed with the 40 hp, 60hp allways left out on them

[Tom M]

I'll be running a 59 ci 60 short shaft tiller on my Thundercat this year, it's bone stock and as yet hasn't been tested. Mostly a lake boat, some racing.
Read through the 40 posts, good info. Don't plan on making motor changes till I know what I have and for all I know, it may be fine the way it is.
Will work on set up first then make sensible motor changes as required. The goal is to keep the motor alive, have fun and go a little faster as time goes on.
Looking forward to opinions posted here.

[omcstratos]

i've known some who have tryed with the 40 hp, 60hp allways left out on them

As in the 60 was faster? Not dependable? Sorry, I'm not quite understanding what you mean.

[Fast Fred]

60 was allways faster

[fs5]

I'll be running a 59 ci 60 short shaft tiller on my Thundercat this year, it's bone stock and as yet hasn't been tested. Mostly a lake boat, some racing.
Read through the 40 posts, good info. Don't plan on making motor changes till I know what I have and for all I know, it may be fine the way it is.
Will work on set up first then make sensible motor changes as required. The goal is to keep the motor alive, have fun and go a little faster as time goes on.
Looking forward to opinions posted here.
sorry to hijack the thread,but
what hull you got mate?
the 60/55 hps mercs go well.i got a 2000 model 55 seapro been runnin hard since I bought it .still goin hard...
if you don't have a hull yet get an aquarius .there fast and very stable at topend..
a 60 merc will run 60+ on a slt boat average crew,with a bantam weight crew you'll be runnin 65+.
1 up be carefull you'll do well over 70 if you can hold onto it.
I want to build mine up to one of these 90+hp motors you see in smack boats ,..

http://www.youtube.com/watch?v=i6drdei4rU8

[Tom M]

Reply posted in Thundercat section...

[HankFrazier]

My 40 was done by Hydrotec it's running pretty good but I'm wanting to make this 60 block into a play motor for most hp I can get out of it. Can the 60 block be made out to be more or less than the 40 block or will they be about the same? Fig they had a little different ports but are the same everywhere else 59 ci
I've got both there is no difference.

[HGipson]

Can you drop the sleeves and fill the compression relief port and make any more power?

[Fast Fred]

if there were the same, the part number be the same, two different part numbers,

[HankFrazier]

if there were the same, the part number be the same, two different part numbers,
Ok. sound's like you know more about them than i do.

[Rabbitdundied]

Trst


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[HGipson]

Rabbit you done moved over to the BRF forum from AR Hunting? I'm Cache_Swamp on there. Seen ya down at float road this year in your new boat I believe

[HGipson]

I think the 40,50,&60 powerhead 59 ci were the same motor. Only reason there were separate part numbers was diff reed stops and carbs I would imagine. I know the 60 aren't held back as much as the 40 are. But in the end you've still only got 59 ci unless there's something I'm missing

[omcstratos]

I think the 40,50,&60 powerhead 59 ci were the same motor. Only reason there were separate part numbers was diff reed stops and carbs I would imagine. I know the 60 aren't held back as much as the 40 are. But in the end you've still only got 59 ci unless there's something I'm missing

I might would guess port timing is different

[Rabbitdundied]

Yes I am lurking over here trying to learn some stuff. I am a complete newb though. You have a picture of your set up?


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[HGipson]

I might would guess port timing is different

Yeah I've heard the port timing was a little diff but in the the end after all port work was done wouldn't matter if it was a 40,50,55,or 60 - a 59 ci Merc block is a 59 ci Merc block regardless of hp rating.

[HGipson]

Yes I am lurking over here trying to learn some stuff. I am a complete newb though. You have a picture of your set up?


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You've got the first Havoc w a Mega if you're the same guy I'm thinking about. Thinking about getting one myself. There's abunch to be learned on here these guys have helped me out a lot. Can't argue with experience and these guys have been through most all of it and forgt more than most will ever know.

[HankFrazier]

Yeah I've heard the port timing was a little diff but in the the end after all port work was done wouldn't matter if it was a 40,50,55,or 60 - a 59 ci Merc block is a 59 ci Merc block regardless of hp rating.

the blocks are the same.

[HGipson]

the blocks are the same.

That's what I was thinking appreciate it it Hank. Y'all gonna bring those gator boats up here in May?

[Rabbitdundied]

Yeah that's me. Trying to learn enough to decide what I want to do with it.


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[Six four]

Hunter, I keep telling you get a real race boat,lol jk you would hurt yourself, we need a few of them thundercats in are possesion.. we could play pinball in the woods haha

[HGipson]

Hunter, I keep telling you get a real race boat,lol jk you would hurt yourself, we need a few of them thundercats in are possesion.. we could play pinball in the woods haha

Yessiirr Id roll in one with ya! I'd def kill myself with anything much faster than what I've got, all depending in if the one I got doesn't kill me first!

[HGipson]

Yeah that's me. Trying to learn enough to decide what I want to do with it.


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Whata you wanting to do? Is that M40 stock or have you got it fixed up a little?

[Rabbitdundied]

It's completely stock. Thinking of carbs, tuner maybe shaving the head. The main thing is I want it to idle well as much as I hunt timber. I am basically wanting to play with it a little. I want to go to Augusta and good off this summer.


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[Six four]

Lil boat big motor, key element lol

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[HGipson]

It's completely stock. Thinking of carbs, tuner maybe shaving the head. The main thing is I want it to idle well as much as I hunt timber. I am basically wanting to play with it a little. I want to go to Augusta and good off this summer.


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I gotcha so that boat ran 42 mph with a stock M40D that's pretty good. I'm hoping I can get around 60 outta the one I'm going to get this spring pending on selling the boat I have now. You aughta be able to get around 50 mph out of that Tohatsu. It won't run with these Mercurys but it shouldn't be expected to either its a lot smaller displacement. There are several guys that work on those to build em up. Kent Foreman in LA and Hydrotec in MO are two that I know of that you won't be disappointed in. Good luck man hope to see ya at Augusta

[Rabbitdundied]

I didn't know Foreman or Hydro Tech worked on them. Thanks for the information.


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[HGipson]

I didn't know Foreman or Hydro Tech worked on them. Thanks for the information.


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Yessiirr they both do. Talked to one of em about it today. Got a friend wanting one done those two are about the only ones that I've drove or rode in a boat with their motors on the back. Hydrotec built mine and Kent built several of my buddies motors and they all run good and never had a problem out of any of em. Those 5 degree days these motors fired right up and ran all day long. Can't beat that. You'll want to shave the head, get the crank welded, 70 carbs, tuner work, and port work and a new prop that will hang with it. Good luck man. If you need anything holler at me

[ryanhall]

Hello if anybody needs I have the inspection sheet for this motor email me at leehallenbeck91@gmail.com and I will share them.

[fs5]

has anyone tried filling the back of the reed block with epoxy,below the reeds where that cavity is?
if so ,did it make much difference?
thanks

[fs5]

heres a pic of what i'm talkin about.you here so much about the v6 guys stuffing the crank case and whatever they can.
theres quite a bit of space there you could fill in.

[HankFrazier]

That's what I was thinking appreciate it it Hank. Y'all gonna bring those gator boats up here in May?

we looking forward to coming up there and racing ya;ll starting to test this weekend we need to know how long the drag coarse is for sure so we can set our boats up for the correct distance. we don't circle race.

[BRzuki]

They say it is 1000' buoy to buoy. I don't know if they use a range finder or not, but it is close to that.

[HGipson]

We may end up shortening the race up a little to 800' but we are still throwin that idea around. 1000 race just he's the boats up to a high enough speed it almost makes the turns dangerous and we don't want anyone getting hurt. The nitrous boats will have to be ran against other nitrous boats. Won't be fair to anyone running motor alone to race someone with NOS. But there will be an after party at the sandbar afterwards for any of us that want to have race or run the rest of the afternoon ! Gonna be a good time! Duck boats against duck boats and race boats against race boats should make for a good time. And this is not going to be a set in stone race.... Meaning the rules can always be bent if folks just want to run unlimited

[hightide]

Since this is a thread about the differences in the 59ci mercs, what is the difference in the 40/50 and 60 cranks? Does the 60 have more stroke?

[fs5]

just different splines to suit the 40/50 box ??