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Author Topic:   Outrage 18 Re-Power with 140-HP Suzuki
5lranch5 posted 05-26-2004 12:36 AM ET (US)   Profile for 5lranch5   Send Email to 5lranch5  
[This article has been edited for clarity--jimh.]

I have a 1983 OUTRAGE 18 with a 150-HP Johnson. Will the performance be the same with a 140-HP Suzuki four-stroke engine? My expectation is the fuel economy will be better with the four-stroke. Will the [acceleration] be the same? Will the Wide-Open-Throttle speed be the same?

The price is $9,400 installed. If you know of a better deal, please let me know. I can install the new motor myself if needed.

What is the value of my clean, running, 1983 Johnson 150-HP outboard?

Bigshot posted 05-26-2004 11:21 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
Not too bad if that includes controls, gauges, etc and tax...anotherwords "out the door". Ed's sells the Johnson version for $7500 and I have seen leftovers for under $7k. Once you include shipping, controls, gauges, prop, ads up. To close the deal, make him throw in a Stainless steel prop.
Bigshot posted 05-26-2004 11:23 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
You will burn 1/2 the fuel, holeshot will be a tad slower being a 4 stroke and 2 less cylinders. Top speed is high 40's...maybe 50 if you set it up right.
tbyrne posted 05-26-2004 11:33 AM ET (US)     Profile for tbyrne    
I agree with Bigshot - you'll burn vastly less fuel (my '82 Johnson 150 on an '82 Outrage sucked fuel down like no one's business). I also think holeshot will suffer a tiny bit, but top end should increase since the old 150 was rated at the powerhead and the Suzuki 140 is rated at the prop.

I doubt your 150 is worth very much - maybe $500-1000?

Good luck!!

jimh posted 05-26-2004 09:59 PM ET (US)     Profile for jimh  Send Email to jimh     
Even the most generous claims by the manufacturers only tend to purport an increase in fuel efficiency of about 40-percent. If you get that much of an improvement you should be happy.

A motor from the early 1980's may have been rated at the power head. I do not know if we have ever precisely determined the date when power ratings changed over to the ICOMIA 28-83 standard. Maybe it was 1983!

Even if your "150-HP" c.1983 engine was rated at the propeller shaft, it is over twenty years old, so perhaps it is a bit tired. A new engine rated at "140-HP" should be very comparable in performance.

The SUZUKI engine does not have any of the performance enhancing features that other modern four-stroke engines have been designed with, such as the variable valve timing seen in the HONDA engines, or the super charger air induction of the MERCURY VERADO engines. Thus I would not expect anything particularly impressive about the 140-HP performance. Your acceleration may very well lag behind that of the older two-stroke engine.

The Wide-Open-Throttle speeds should be similar, assuming you have the proper propeller. Horsepower is horsepower, one would hope.

Pricing of SUZUKI engines seems to be very flexible, and they are generally sold at very substantial discounts from their MSRP. They also seems to sell below all the other engines of similar horsepower. The strategy of SUZUKI is clearly one of trying to build market share and brand recognition through very aggressive price competition. SUZUKI has also offered very generous extensions of the warranty period, up to six years, at no extra cost. These are generally in effect during the spring and will have expired by now.

For more information about ICOMIA 28-83 rating standards, see:

5lranch5 posted 05-26-2004 10:44 PM ET (US)     Profile for 5lranch5  Send Email to 5lranch5     
thanks for all the help
Tom2697 posted 05-28-2004 11:37 PM ET (US)     Profile for Tom2697  Send Email to Tom2697     
You are talking about setting up your boat exactly like mine. I installed the DF140 just over a year ago. I set my boat for offshore fishing and waterskiing so I lost some top end but, the holeshot is still good enough to get me up (at 185 lbs) on one ski with six people in the boat with minimal to no dragging. The boat'll run 39+ knots WOT and will average over 6 mpg. She'll also run 6-12 knots all day long without a hiccup.
David Jenkins posted 05-28-2004 11:50 PM ET (US)     Profile for David Jenkins  Send Email to David Jenkins     
What prop are you turning, Tom? Are you using a jackplate? How high do you have the engine mounted? How many RPM is the engine doing at wide open throttle? Thanks for the info. I'll be putting a DF140 on my 1974 Outrage 19 in another week or two.
Tom2697 posted 06-04-2004 11:41 PM ET (US)     Profile for Tom2697  Send Email to Tom2697     

If memory serves me, I'm running a 14.25 x 18 PowerTech Prop. While loaded for offshore fishing (full fuel, 2 people, 6 heavy rods (smallest is a Penn 30) and about 80 lbs of ice) she'll run up to 5900 rpm. With just me, very light gear (maybe just a 6-pack), and about 15 gallons of fuel, I'll get to 6200 rpm. I don't recall the mounting hole but the hanger is at least 1 inch above the transom. I had a former Boston Whaler dealer set it up for me and just trusted their judgement. I'm happy with it though. I considered a jack plate since flats fishing is great down here but decided to go with the 25" shaft.

Good luck with your motor!


Mark426 posted 06-14-2004 10:04 PM ET (US)     Profile for Mark426  Send Email to Mark426     
$9400 seems really high. I dont know the price of the Suzuki. But, I do KNOW that the Johnson 140 is the same engine as the Suzuki. Suzuki makes it for Johnson and paints it white....thats the truth. Look at the Ed's Supermarine link below for a complete price list.

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