150 hp under powered

let me tell you what i have i have a 150 black max 1988 mercury o,b, and was not happy with the performance then i asked the question that your asking and was told to put on a 15x17 prop i was turning a 13 1/4 x 19 now im very happy so its allmin the prop size
 
let me tell you what i have i have a 150 black max 1988 mercury o,b, and was not happy with the performance then i asked the question that your asking and was told to put on a 15x17 prop i was turning a 13 1/4 x 19 now im very happy so its all in the prop size sorry about that when i go out there are 3 adults 235 ld 180 160 thats like 600 lbs or people plus my takle and gas i have a 55 gallon tank so i figure i must have 1000 lbs on board and i go top speed about 34 mph on my gps with bad bottom paint chips and old so im happy and when you hit the throttles it will throw you back i like that so a 150 yep its good more is better in my book but a 150 is a good choice
 
I am also using a 15x17 ss prop on a 155 commercial evinrude. I get about 38 mph wide open. Is the 15x17 prop used by most of you on a step v 20 ? I was going to try some different prop sizes but I think I'll leave it alone if that's the best torque and speed I'll get. Dennis
 
I use a 15X15 1/4 I have used the 17 but I like the out of hole better then I like the top speed.
When there is 3 guys and 200+ pounds fish I need that little extra push!
But I stll get up to 38mph with a light load, and curz 30+ with all the weight and thats fine by me ;D
 
menacer said:
I am also using a 15x17 ss prop on a 155 commercial evinrude.  I get about 38 mph wide open.  Is the 15x17 prop used by most of you on a step v 20 ?  I was going to try some different prop sizes but I think I'll leave it alone if that's the best torque and speed I'll get.  Dennis
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I've never herd of a 155 commercial Johnson what year is the engine. I had trouble matching my vin. number to part # when trying to find a few parts. The place working on my motor said that it was a Military issue and when I asked the difference they had no idea. They thought maybe a little more corrosion protection and gearing than the commercial engine.
 
There is not a whole lot of difference in a commercial motor, But one thing you will see on every one, or not see, is the oil injection system, they don't have one!!
Which s a good thing! ;)
 
Stillrunning said:
I've never herd of a 155 commercial Johnson what year is the engine.
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Mine was a 1988. It had a Johnson cover but when I traced the numbers it was actually an Evinrude (same difference).
 
macojoe said:
There is not a whole lot of difference in a commercial motor, But one thing you will see on every one, or not see, is the oil injection system, they don't have one!!
Which s a good thing! ;)
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My commercial 155 has VRO
 
Thats what I mean, every time you think you know something some one proves you wrong!!

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macojoe said:
Thats what I mean, every time you think you know something some one proves you wrong!!

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Macojoe,
It wasn't my intention to prove you wrong. You are probably correct. My motor may have been a special order, it was owned by one of the oil refineries on the Delaware river and was used on a emergency response boat. The motor is 16 years old an has less than 400 hours on it. Mixed gas will lose its lubricating properties over long periods of time. I would assume that might be the reason it has VRO.
         Dennis
 
Macojoe,
It wasn't my intention to prove you wrong. You are probably correct. My motor may have been a special order, it was owned by one of the oil refineries on the Delaware river and was used on a emergency response boat. The motor is 16 years old an has less than 400 hours on it. Mixed gas will lose its lubricating properties over long periods of time. I would assume that might be the reason it has VRO.
Dennis
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Don't sweat it!! I am always proven wrong!! My wife does it all the time ;)

I had just always heard that they had no injection to them, and I have seen 2 so far but they were made in Mexico.

When you have been around boats and motors lone enough you will always hear something out of the norm!!
Don't worry my skin is much thicker then that!! ;)
 
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