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2004 Jonson 150's, run away or buy?

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2004 Jonson 150's, run away or buy?

Old 03-06-2019, 09:33 AM
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RPK
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Default 2004 Jonson 150's, run away or buy?

Looking at a boat, waiting on survey, that has twin 2004 Johnson 150's, carburated. Everything i read says they are tanks, do use alot of gas, and make some smoke, but are easy to work on, cheap parts etc. One local dealer says to run away, because you can't get some parts anymore, and they are getting harder and harder to find. They have 400 hours on them.What do you guys think?
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Old 03-06-2019, 09:56 AM
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I see no issues, depending on the price. Parts are readily available for those motors.
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Old 03-06-2019, 09:58 AM
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I have a 04 40hp, I certainly realize that's a different size block and horsepower, but mine has been unkillable.
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Old 03-06-2019, 10:02 AM
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BRP and solid!
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Old 03-06-2019, 10:04 AM
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Good, solid motors. Plenty of parts available.
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Old 03-06-2019, 10:05 AM
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I see many of those on the water and had a similar engine just a few years ago and did not have any issues.

If you are on a limited budget then they are a great engine choice. But they are loud, thirsty, and smokey, which means you should get a good deal on them.

Last edited by MTSkibum; 03-06-2019 at 10:17 AM.
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Old 03-06-2019, 10:12 AM
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Those engines would not stop me from buying the boat at a fair price. I had a skiff with 90hp Johnson, ran forever, no issues.
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Old 03-06-2019, 12:14 PM
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It's 15 years old, so condition and maintenance history are probably more important than reputation. Any visible corrosion? Still running oil injection?
Ask some questions, when was the water pump last replaced. Lower unit oil changed? Tstats replaced?
They have plastic carb bowls that will leak if left sitting for a couple of seasons.
The prop is usually a good indicator, a boat with trashed props has probably not been babied.
Check compression, and look at the plugs, if one of the bottom ones looks steam cleaned or rusty, you're getting water in that cylinder.
If it has been sitting for several years, the old fuel should not be used, fuel lines replaced and water separating fuel filter installed. The onboard oil tanks should be checked for water. Carbs cleaned. With Bombardier, look at the fuel line hose clamps, the oetiker style is highly reccomended.
Bad gas, water in the oil, collapsed fuel lines or clogged jets will kill any brand engine.
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Old 03-07-2019, 07:56 AM
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Originally Posted by hevysrf View Post
It's 15 years old, so condition and maintenance history are probably more important than reputation. Any visible corrosion? Still running oil injection?
Ask some questions, when was the water pump last replaced. Lower unit oil changed? Tstats replaced?
They have plastic carb bowls that will leak if left sitting for a couple of seasons.
The prop is usually a good indicator, a boat with trashed props has probably not been babied.
Check compression, and look at the plugs, if one of the bottom ones looks steam cleaned or rusty, you're getting water in that cylinder.
If it has been sitting for several years, the old fuel should not be used, fuel lines replaced and water separating fuel filter installed. The onboard oil tanks should be checked for water. Carbs cleaned. With Bombardier, look at the fuel line hose clamps, the oetiker style is highly reccomended.
Bad gas, water in the oil, collapsed fuel lines or clogged jets will kill any brand engine.
What he said.... I would add that you are gambling when you buy a 15 year old outboard. Assume that you will have to repower in the near future and make your offer accordingly.
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Old 03-07-2019, 02:02 PM
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They are probably the most reliable 15 year old motor you could buy.
The 150 was the smallest of the V6's and known to run for thousands of hours without major issues.
Have them checked as mentioned above...make sure they are propped right, so that the wot is in the right range.....looking at the charts the 150 should max out 4500-5500, I would want it close to 5200-5500 though.
Overpropping is what kills these motors due to carbon build up in the cylinder walls....hook a ring and they're toast....
If they are propped right and you run good fuel with semi synthetic oil like Pennzoil or similar they should run forever....just take care of them.
Parts are still plentiful....they will drink fuel and oil, and they will smoke (less with Pennzoil semi synthetic) but they should be much less to maintain, yes, even than a newer engine.
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Old 03-07-2019, 08:54 PM
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Originally Posted by RPK View Post
Looking at a boat, waiting on survey, that has twin 2004 Johnson 150's, carburated. Everything i read says they are tanks, do use alot of gas, and make some smoke, but are easy to work on, cheap parts etc. One local dealer says to run away, because you can't get some parts anymore, and they are getting harder and harder to find. They have 400 hours on them.What do you guys think?
POS.... Couldn't give me those....
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Old 03-07-2019, 10:02 PM
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Originally Posted by inriver View Post
POS.... Couldn't give me those....
you need an explanation with a statement like that! Let me guess, you knew a guy who heard that someone they had one that blew up.
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Old 03-07-2019, 11:07 PM
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had one on the back of a 21 fotter , went flawlessly for the 2 years i owned it , i would never had replaced it ,only that i smashed the gearbox off it on a reef.

yea , it used fuel ,however not excessive for a 150 hp 2 smoke.

oil smoke was only a bit at cold start up then didn't smoke again all day.

also IMO a nice looking motor.
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Old 03-08-2019, 12:03 AM
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Originally Posted by RPK View Post
What do you guys think?
Personally, I have never bought a used 15 yr old outboard that lasted more than 1 1/2 seasons. Just me, I know, but if I were shopping, I would give the engines a value of under $1K in my calculations.
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Old 03-08-2019, 10:24 AM
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Originally Posted by Jkcam View Post
Personally, I have never bought a used 15 yr old outboard that lasted more than 1 1/2 seasons. Just me, I know, but if I were shopping, I would give the engines a value of under $1K in my calculations.
My 96 is still rockin.
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Old 03-08-2019, 10:47 AM
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The Boating Icon would caution OP on paying much for motors that old. If the price was right and allowed enough of a discount to provide cash for a repower not-too-long-from-now, the Icon would go ahead and buy. Otherwise, he'd steer clear.
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Old 03-08-2019, 12:18 PM
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I've got a 99 that I have had zero issues with other than a lower unit. Mine had a supposed 300 hours on it when i bought it used in 2006. I've probably put another 600 on it. No hour meter so i'm just guessing really. It is thirsty, but it's real punchy. Only thing I've found with mine is that it likes to be started a little differently depending on how cold it is outside. Took a while to get that figured out, but now that i have it, it starts great. Personally, I like the smell of oil...
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Old 03-08-2019, 12:32 PM
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I have a 1994 purchased new in 1996 and its still running strong and it sank in salt water.
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Old 03-10-2019, 11:17 PM
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There are plenty of old engines still running strong. Most of them are owned by knowledgeable and skilled guys that keep them it top shape year after year. BUT when you go to buy an old engine, the percentage of engines that have had excellent care over the years is greatly reduced. Like 5%. Hence my stand on no old engines.
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