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Author Topic:   50 Merc 4-cycle on 15 CC

skred posted 09-03-2002 11:48 AM ET (US)
Finally got my new Merc 50 4-cycle installed on my 15 Sport center console, and did the break-in according to the manual. Next outing I tried to get some numbers, but Lake Michigan wasn't cooperating. Herewith some tentative performace figures: Carrying total weight of 660 lbs., 13 pitch prop, engine trimmed all the way in: 32 mph before my GPS batteries yakked. This was not quite at WOT since I dislike being airborne. There was some chine-walking. I'm estimating that trimmed out a bit, and in calmer water, it should exceed 35 mph.
The gas mileage was surprising. 2 hours of break-in at 1/2 throttle or less, then 3 hours at various settings with a couple attempts at 90% throttle, and I still have at least 2 gallons in the 6.5 gallon tank.
Along with the exraordinary quiet, I'm a 4-cycle fan from here on in.
Bigshot posted 09-03-2002 02:14 PM ET (US)
Thought you would like it! 35 is on the money, especially with that weight. How were the rpm's? With less weight a 15" might work.
lc posted 09-04-2002 04:32 AM ET (US)
Skred. How is your 50 set up? is it on a lift bracket or directly on the transom. What year? Did the prop and throttle gear come with it? what type of prop? Thanks
skred posted 09-04-2002 08:24 AM ET (US)
Bigshot, I don't have a tach installed yet, but it sure sounds like 5500 or so.... I'm going to break down and get a tach this week. If I get some calm water and batteries in my GPS, I'll have a more complete report next week...
To the other questions: It's a 2001 new in the box. It included 13 pitch merc aluminum prop, binnacle mount controls and installation and testing for $5000. The motor is mounted directly on the transom and used the original 70 Yamaha mounting holes.
Interestingly, after reading the manual, I was concerned that the warning alarm for oil, heat, over-rev conditions did not sound the "beep" that the manual said it should on startup. The dealer told me they eliminated the initial beep a couple years ago, but never changed the manual. Anyone with a 40-50-60 Merc 4-cycle in this year range found that to be true?


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Author	Topic: 50 Merc 4-cycle on 15 CC
skred	posted 09-03-2002 11:48 AM ET (US) Finally got my new Merc 50 4-cycle installed on my 15 Sport center console, and did the break-in according to the manual. Next outing I tried to get some numbers, but Lake Michigan wasn't cooperating. Herewith some tentative performace figures: Carrying total weight of 660 lbs., 13 pitch prop, engine trimmed all the way in: 32 mph before my GPS batteries yakked. This was not quite at WOT since I dislike being airborne. There was some chine-walking. I'm estimating that trimmed out a bit, and in calmer water, it should exceed 35 mph. The gas mileage was surprising. 2 hours of break-in at 1/2 throttle or less, then 3 hours at various settings with a couple attempts at 90% throttle, and I still have at least 2 gallons in the 6.5 gallon tank. Along with the exraordinary quiet, I'm a 4-cycle fan from here on in.
Bigshot	posted 09-03-2002 02:14 PM ET (US) Thought you would like it! 35 is on the money, especially with that weight. How were the rpm's? With less weight a 15" might work.
lc	posted 09-04-2002 04:32 AM ET (US) Skred. How is your 50 set up? is it on a lift bracket or directly on the transom. What year? Did the prop and throttle gear come with it? what type of prop? Thanks
skred	posted 09-04-2002 08:24 AM ET (US) Bigshot, I don't have a tach installed yet, but it sure sounds like 5500 or so.... I'm going to break down and get a tach this week. If I get some calm water and batteries in my GPS, I'll have a more complete report next week... To the other questions: It's a 2001 new in the box. It included 13 pitch merc aluminum prop, binnacle mount controls and installation and testing for $5000. The motor is mounted directly on the transom and used the original 70 Yamaha mounting holes. Interestingly, after reading the manual, I was concerned that the warning alarm for oil, heat, over-rev conditions did not sound the "beep" that the manual said it should on startup. The dealer told me they eliminated the initial beep a couple years ago, but never changed the manual. Anyone with a 40-50-60 Merc 4-cycle in this year range found that to be true?