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Old 08-08-2017, 10:31 PM   #1
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Default SCR 3000 speed

I had a SCR 3000 maxum with 5.0L engines. The boat had a top speed of about 42MPH. I sold the boat and the person that bought it said it never went that fast. It did when he bought it. Now he bought another boat and another friend wants to buy it He test drove it and said top speed was 30mph. I told him I would get compression test as that is a 40mph boat. The person that bought it from me 3 years ago had it surveyed by a very tough surveyor. This guy went all over this boat with moisture meter. The boat passed with flying colors at that time. Any suggestions of what could have gone wrong?
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Old 08-09-2017, 12:13 PM   #2
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Compression test is easy and will help to determine if lack of power is the culprit.
Next would be tuning. Is the timing set properly?

If powerplants check out, then have the props been changed, additional gear accumulated over the 3 years, is the bottom clean, etc.
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Old 08-09-2017, 01:40 PM   #3
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Are they loading the same load on the boat (water, fuel, gear, people)? Too many variables. I would completely unload the boat. Run with empty tanks and 1/4 fuel and get a baseline. I would test with only 2 people on the boat.
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Old 08-09-2017, 02:04 PM   #4
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I used to ravel with that boat with 4 people and loaded with cooler, and everything else needed for 5 days or more and still did 40mph and cruised at 29 to 30mph
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Old 08-11-2017, 04:04 PM   #5
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Check the simple stuff. How long has it been in the water? Could simply be growth on the hull and drives.
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Old 08-11-2017, 04:41 PM   #6
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Fresh water boat. Put in spring. Speed was around 30mph tops. I think tune up. He has had bottom painted. but speed was slow before. Just isn't right, I know that boat will do 40mph. Any body else have SCR 3000? What are their speed. This guy try's to tell me that that boat can't do that speed.
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Old 08-14-2017, 02:47 PM   #7
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In all honesty, why do you care? You're neither buying nor selling the boat.
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Old 08-14-2017, 07:28 PM   #8
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I have a 3000 SCR w/twin 5.7 EFI. I run 30 mph at 3600 rpm. I hit 40 once on glass water perfectly trimmed with the wind at my back. Check your speedo too. Even the GPS can be wrong. Use a GPS on a phone to confirm.
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Old 08-14-2017, 11:00 PM   #9
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I got my 3000 scr up to 32 mph once, and the sound of fuel sucking down the carbs at such a high speed scared me, so I pulled back. It's a cruiser, not a speed boat... at least to me.

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