Interesting test on Yamaha outboards

T

thataway

Active member
Yamaha took a F 150 with 8700 hours on it and compared its performance with a brand new F 150. The time to plane 4.6/4.5 seconds, Top Speed 43.1/43.6 and mileage:4.32/4.57 were little different! The used 150 was one of two on a water taxi, so it had daily service in Charleston S C (salt water). The two engines were compared on a 21 foot run about. That is pretty impressive for 8,700 hours ! a tenth of a second less to plane, top speed 1/2 knot less, and .25 mpg less! I suspect that Honda and Suzuki would fair about the same. So much for "how many hours should I worry about?" But this was an engine run every day--and most likely well serviced!
 
That's interesting...and good to know! I won't be concerned about 1050 on my Honda 90. It still runs perfectly, starts easily, and doesn't burn (or make) a drop of oil.

Do you have a link to the test?
 
Neato! My Yamaha F80 should live so long :D

I'm just taking a short break right now and have to get back to what I was doing, but it would be interesting to calculate around how many miles that would be if it were a car engine. I think I've read before where people figured that out by converting various figures.
 
Although there are various averages out there, this is a hard one to answer, because although the average car speed is about 30 mph-there is a lot of idle time in city driving, and 60 mph in country driving (which is easier on the car's engine).

At 30 mph, 100 hours equals 3000 miles. (this is also where the "change your oil every 3000 miles comes from) So 1,000 hours equals 30,000 miles. So this boat engine went equal to 240,000 miles. We know that a Volvo 1966 P 1800 has gone 3 million miles ...Doubt that any outboards will make the 100,000 hour test however.
 
Sunbeam":xyaaw131 said:
Neato! My Yamaha F80 should live so long :D

I'm just taking a short break right now and have to get back to what I was doing, but it would be interesting to calculate around how many miles that would be if it were a car engine. I think I've read before where people figured that out by converting various figures.
Click to expand...

Figure conservatively a car engine pushes a car along at an average speed of 30MPH. Then 8700 hours = 8700*30 miles = 261,000 miles. Not unheard of at all these days in a good car (especially a Japanese model). Now consider driving in and cooling that car with salt water....
 
The mechanic that services my Suzuki 150s told me about a couple of his customers who are commercial watermen that have 8,000 hours on their Suzuki 140s which are still running perfectly. He did highly recommend the use of "Yamalube" Ring Free Fuel Additive and running the engines at high revs under full load for a few minutes at the end of a long day of cruising. Tearing down and rebuilding many engines over the years, he's emphatic that the Yamalube is effective and makes a difference in engine longevity. I now use it religiously. Cruising extensively on our TomCat for two years, our Suzukis now have 300 hours on them. At this rate they will long outlive me. After spending $26,000 to rebuild my CAT 3208TA after 1800 hours on my previous boat, I'm a very happy 4-stroke owner.
 
For what it is worth, I have been running Mobile One synthetic in my honda 45s for well over a decade and when I adjust the valves (did it last winter again) there isn't a lick of rust or any corrosion anywhere. The inside is far cleaner than the outside......And these motors have 2000 hours on them, which at one time I thought was a lot.....LOL.....
 
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