gear ratios

[redbud35]

What would the differance between running 1.36 gears and 1.5 gears? I'm currently using 1.5's and have found some sportmasters with the 1.36 I wanted to try.

[MOBILEMERCMAN]

The 1.5 will probably accelerate better. The 1.36 will likely need a prop with about 2 inches less pitch to try it and give it a real test.

I would take advantage of the opportunity to try them.

[Blue Thunder]

You will get a higher prop rpm. A prop WOT rpm approaching 5000rpm is said to be optimal for top speed, the 1.36 will get you closer. But you will loose on the bottom.

[bajabob 718]

What would the differance between running 1.36 gears and 1.5 gears? I'm currently using 1.5's and have found some sportmasters with the 1.36 I wanted to try.

ok i did a test same boat same prop 150bravo 3600rpm 40mph 136bravo 3000rpm 40mph i like the 136 . i never take off full speed i think it is hard on the drive i throttle at 3000rpm my boat plane off nice . i never race at a dead stop. think about it you are crusing a nother boat come on the side of you . then you smile at them trun your hat around and push the throttle down. with the 136 you dont have to put a big pitch prop now all boats are not the same . i have a 1988 baja the bravo drive is low in the water i run 23 mirage prop. if you got a drive to try just make shore you go down on the pitch on the prop . my old motor i went from a 23 pitch down to a 21 pitch 136 drive my boat was faster top speed but slower out of the hole . and i gps all my tests good luck

[J.T.]

The sportsmaster lowers might queer the results
...sportmaster lowers have big skegs.... that has been
known to slow boat that run sub 90 down, compared
to a std gearcase.

[bajabob 718]

i got this from mike http://www.youtube.com/watch?v=3zgHL0mErk4 this glasstron has136alfa drive small block 25pitch cleaver prop 124mph

[fixxxer22]

I have a 1.36 for sale. I hate it the acceleration is poor. It feels like you are stepping on a plum. I have talked to many drive experts and they all said unless you are making 800 plus horsies they would stay away from the 1.36 i am only running about 500hp and with some people and beer and fuel in the boat i feel like i am pushing too hard on the drive.

[bajabob 718]

thats because you have to run a 19plus or a 21mirage prop. i had a 624hp runnig a 23mirage prop at 5400rpm if i ran a 150 i would have a 28pitch prop when you run a 136gear you have to you a small prop to make it work . i told you in 1987 they put 136gears alfa drive with a 19pitch cleaver prop from the factory! and a 330mag 454 ! the boat ran 55mph it not a big deal you got the 150 drive on now are you runnig a 25pitch mirage now?? how mush for your drive?

[bajabob 718]

I have a 1.36 for sale. I hate it the acceleration is poor. It feels like you are stepping on a plum. I have talked to many drive experts and they all said unless you are making 800 plus horsies they would stay away from the 1.36 i am only running about 500hp and with some people and beer and fuel in the boat i feel like i am pushing too hard on the drive.

ok i am going to tell put a 21mirage prop on your boat with the 136 . my buddy has the same boat and power as i had with my 2 motor 150 bravo drive 25pitch mirage prop 5000rpm i have 136 gears 21mirage prop 5200rpm 40mph we go wot i jump ahead by one boat and stay ahead the hole time he ran 65mph on gps i ran 66.6mph no bs. now if we ran from a dead stop he would beat me out of the hole ! i always take off at 3000rpm let the boat plane off .it go 40mph at 3000 and cruise .i never race from a dead stop it hard on the drive ! if you ski off your boat then i would stick to the 150gears . either way the boat will run good with THE RIGTH PROPTHATS THE KEY TO RUNNIG GOOD .MAX TO THE REDLINE IN YOUR RPM

[Bradz]

Stick with the 1.50 gear ratio. Unless you are running out of prop pitch. The Sportmaster lower units are best for surfacing and running over 90 mph.

[fixxxer22]

ok i am going to tell put a 21mirage prop on your boat with the 136 . my buddy has the same boat and power as i had with my 2 motor 150 bravo drive 25pitch mirage prop 5000rpm i have 136 gears 21mirage prop 5200rpm 40mph we go wot i jump ahead by one boat and stay ahead the hole time he ran 65mph on gps i ran 66.6mph no bs. now if we ran from a dead stop he would beat me out of the hole ! i always take off at 3000rpm let the boat plane off .it go 40mph at 3000 and cruise .i never race from a dead stop it hard on the drive ! if you ski off your boat then i would stick to the 150gears . either way the boat will run good with THE RIGTH PROPTHATS THE KEY TO RUNNIG GOOD .MAX TO THE REDLINE IN YOUR RPM

That is just the way i feel about the ratio. Not trying to get into a pissin match here. I was told by bblades to run the 24 bravo 1 witch is a 23p prop. it ran verey well all things considered. the plaining always sucked but it was fine. I am going by what Dick Tryce "Mr Gadgets" said and he told me that was the wrong setup unless i was in the 800 plus horsepower rating. So, I found a 1.5 and I have yet to try it hopefully it is what i am looking for. and i will sell that drive for $1500.00 if you would like it. It is in good condition and was working the last time i took it off the boat. It is a genuine mercruiser replacement due to the last owner hitting something. I do not know how many hours are on it but i bet i put 150 on it the boat had 360 on it when i got it.

[bajabob 718]

That is just the way i feel about the ratio. Not trying to get into a pissin match here. I was told by bblades to run the 24 bravo 1 witch is a 23p prop. it ran verey well all things considered. the plaining always sucked but it was fine. I am going by what Dick Tryce "Mr Gadgets" said and he told me that was the wrong setup unless i was in the 800 plus horsepower rating. So, I found a 1.5 and I have yet to try it hopefully it is what i am looking for. and i will sell that drive for $1200.00 if you would like it. It is in good condition and was working the last time i took it off the boat. It is a genuine mercruiser replacement due to the last owner hitting something. I do not know how many hours are on it but i bet i put 150 on it the boat had 360 on it when i got it.

hay that cool i was trying to tell you wt i did runnig with the136gears.i am going to email you on that drive thanksand good luck on your boat