Differance in 40 & 50 Yamaha

[High Tide Dude]

Whats the differance in the 40 & 50 2-stroke, don't they have the same powerhead?

[cudexter]

http://www.yamaha-motor.com/outboard...home/home.aspx

should tell you everything you need to know.

[Chuck the Duck Slayer]

Based on cudexter's link there is no 40hp 2 stroke.

I do know that on my 40 merc 2 stroke it is the same power head as the 50 and 60

[High Tide Dude]

i know about the mercs powerhead, my firend was telling me the other day, wish yammys were like that.

link only shows the 50 hp

[cudexter]

they must not make a 40 yama anymore. i'm not sure.

but that site will tell you information from the source, rather than farmer joe.

[Chuck the Duck Slayer]

it gos from 25 in the portables and then the midrange is 50, 70, 90. I guess with the new EPA regulations they are limiting everything and slowly phasing out the 2 strokes. Some lakes in Mexifornia are 4 stroke only, wonder how long before it is that way here in South Kakalaki?

[High Tide Dude]

i was talking to the owner of pawleys island marine about a month ago, he said 2010 was the last year they were making yammy 2 strokes

[Chuck the Duck Slayer]

They just opened Pawleys Marine about three weeks ago didnt they?

[High Tide Dude]

no, its been ahwile

[Palmetto Duck]

When I bought my 50 last year was told they didn't make a 40 2 stroke anymore.

[DVR]

I have owned a couple of 2 stroke Yamaha 40's and a couple of 50's. Some on identical High Tide 1503 hulls. Minor carb and exhaust tuner changes are about it. IMO-you can't feel any real difference. The overall performance differences are minor at best. Main difference is the 50 is the only one you can now buy new. I have also heard if you want a new Yamaha 2 stroke you need to get one soon. I have a 100% stock 2001 Yamaha 40 now. Again imo- if the 40 does not do it for you the 50 might not either.

I would take a Yamaha over a Merc anyday but the 40 Merc is a strong motor. If you want the strongest 2 stroke 40 a Merc might be the one to look at. It is very easy to make almost 60hp with a merc 40. I would not waste my time trying to get more hp out of a 40/50 yamaha. The yamaha 40/50's are great motors just not the strongest in the class.

[High Tide Dude]

Thanks DVR, i have a 40 yammy, was thinking about putting 50 carbs on it, but it sounds like its not much a differance.

[DVR]

Thanks DVR, i have a 40 yammy, was thinking about putting 50 carbs on it, but it sounds like its not much a differance.

if you do the carbs it won't make any difference unless you open up the exhaust. to do that you have to do some pretty major parts removal. You might gain a little but not worth the time, effort, expense imo. If you run a 40 on a 1503 and you are not happy- you need to find a 60/70 yamaha 2 stroke. that makes a huge difference. I liked my 1503/60 combo. I am sure there is someone hoping to go from a 25 to a 40 out there now.

the info I have stated concerns a boat/motor that you can use for all purposes. I know some guys with screaming yamaha 40's but they are far from stock (major mods, for racing only). they would never consider a HT hull (way too heavy).

[camotoon60]

the 50 has bigger carbs and a bigger exhaust tuner, than the 40. The power heads are identical. you can make alot of power out of a 40. plus they are pretty lightweight. I had a 40 with , 70 carbs, power reeds, and a 50 exhaust tuner on a 1503 hightide, it would run 45 with just me in it.

[High Tide Dude]

i have a bugbuster with a 40 yammy, bored out exaust, exaust tuner, reeds, 15p prop, runs upper 40s-50.

so if i did a carb upgrade how big would you suggest, i was thinking about running a 18p chopper prop, about how fast will i be running then?

[DVR]

I had a 40 with , 70 carbs, power reeds, and a 50 exhaust tuner on a 1503 hightide, it would run 45 with just me in it.

i have a bugbuster with a 40 yammy, bored out exaust, exaust tuner, reeds, 15p prop, runs upper 40s-50.

I have been hearing about these super fast high tides for years. I have owned several and have never gotten one of the fast ones. maybe the next one?

[cudexter]

[camotoon60]

I didnt think 45 was fast?

[High Tide Dude]

I have been hearing about these super fast high tides for years. I have owned several and have never gotten one of the fast ones. maybe the next one?

what kind of high tide did you have? and what upgrades where your running?

[saltynut]

I have been hearing about these super fast high tides for years. I have owned several and have never gotten one of the fast ones. maybe the next one?

High tide dudes boat also runs 10-11 mph faster in creeks than in the river or a lake.