Turning a 1995 50hp triple into 60/70 hp?

[ShoestringMariner]

I’m sure this has been asked before, and I’m asking again because I can’t seem to find a definitive answer. Some say each are specifically built to be “X” hp and some say it’s all the same, and only the carbs are different

Can I get more out of my 50? Or is 50 pretty much it without extensive and expensive mods?

 

[flyingscott]

You will have to compare parts but I am pretty sure it is.mainly in the carbs.

 

[ShoestringMariner]

You will have to compare parts but I am pretty sure it is.mainly in the carbs.

Thanks, so if the crank, rods, pistons, reeds, intake and exhaust manifold all match, anything else I should consider?

 

[Chris1956]

Check the block part numbers. If the displacement and compression ratio is the same, the exhaust scavenging can be different.

 

[racerone]

Sad , sad ---when folks do not understand the manufacturing / marketing of these products.----I have said that parts are the same , same displacement etc.----And here we are with the same questions again .----Ok maybe I over simplify.-----Look into a different cylinder head and carburetors.------Simple bolt it on stuff.

 

[ShoestringMariner]

Does anyone know if a set of carbs from a 1990 70 hp Jonny-rude will work?

 

[ShoestringMariner]

I’m back considering this again. I am trying to determine what model years would have the parts I need to turn it into a 70hp. I’ve been using the BRP part look up and all I can determine is that 1994 to 1997 seem to be compatible by carb assembly and head numbers. 1994 is slightly different. It uses a carb 0437087 (noted with suffix V only) and a 0339221 head.
I’m a little confused by this because these are the same part numbers that make up the 1995 60 hp model.

Any thoughts on this? Does anybody know if previous era carbs/head will work say from a 1990 model? (Or other 56cu motors)

It appears in a 1998 was the switch to fuel injection.

 

[flyingscott]

I’m back considering this again. I am trying to determine what model years would have the parts I need to turn it into a 70hp. I’ve been using the BRP part look up and all I can determine is that 1994 to 1997 seem to be compatible by carb assembly and head numbers. 1994 is slightly different. It uses a carb 0437087 (noted with suffix V only) and a 0339221 head.
I’m a little confused by this because these are the same part numbers that make up the 1995 60 hp model.

Any thoughts on this? Does anybody know if previous era carbs/head will work say from a 1990 model? (Or other 56cu motors)

It appears in a 1998 was the switch to fuel injection.

They never fuel injected the 56 cid motor. And they made the 56 cid carb 70 hp up until around 2005

 

[racerone]

No such thing as fuel injection on those motors.-----Perhaps the Evinrude Ficht models were or the EVIZUKI 4 stroke models.

 

[ShoestringMariner]

OK good to know thanks guys. I’m just guessing at model numbers when I look up anything other than what I have. So perhaps I’m off the mark. In any case, can somebody help me identify the years that will work? Remember, I’m not a mechanic, i’m just a DIY guy trying to learn these motors. If I can get an extra 20 hp out of this 50. I would be very happy. I only bought this motor because it was the newest thing I could get with the money I had in my pocket. I really wanted to 70 but right now they’re running $2500 to 3
grand around these parts if they can be found at all. I have a running 1990 70hp. but it’s very tired with poor compression all across three. If these carbs and cylinder head will work. That would be awesome.

 

[ShoestringMariner]

OK so are my only options looking for years that have the exact same carburetor/head?

Or is the answer is I don’t know?

 

[oldboat1]

not really repair and maintenance, I would say, although getting help. Might try the search engine, or google.

 

[Faztbullet]

Get you a set of carbs from a 1989 to 1995 56ci 70Hp and take head to machine shop and have shaved .030. Bolt these back on and ...presto chango its a 70hp.

 

[oldboat1]

well, there you go Shoestring. Post results, maybe with costs. Hope it does the job.

 

[ShoestringMariner]

Get you a set of carbs from a 1989 to 1995 56ci 70Hp and take head to machine shop and have shaved .030. Bolt these back on and ...presto chango its a 70hp.

This right here is music to my ears!
I have what I need right out in the shop.

thanks very much!

 

[ct1762@gmail.com]

just use your 70hp head and carbs. done. would double check timing @ WOT if you arent getting much out of it though. while you are at it, might as well throw in a set of CCMS plastic reeds.

 

[ShoestringMariner]

just use your 70hp head and carbs. done. would double check timing @ WOT if you arent getting much out of it though. while you are at it, might as well throw in a set of CCMS plastic reeds.

Excellent, thanks. Was thinking of the reeds also.

 

[ct1762@gmail.com]

the reeds really do make a difference, especially with starting and idle. Some of my motors that have them can tick down to 500 RPM and not stall!