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TOPIC: Max revs on a 4.236

Max revs on a 4.236 9 months 3 weeks ago #2701

Hi,
We have a Brewer44 and it has an 85hp Perkins 4.236 Engine . I would like to know what other boats with this engine do for max revs we get around 2400 /2500 and can make around 71/2 to 8 knots.
Mike
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Max revs on a 4.236 9 months 3 weeks ago #2702

  • elschwieb
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We likely are overpropped, but we have the original prop (as far as we know) and suffer no smoking or other ill effects. Our top is shy of 2000 and we get about the same speed, but she squats. We typically cruise at about 1200-1250 at 6.5 or 7 knots under power and burn about 1 gph.
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Max revs on a 4.236 9 months 3 weeks ago #2703

Thank you that helps
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Max revs on a 4.236 9 months 3 weeks ago #2704

  • casper
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We have the same, and turn at about 1300rpm for 7kts.
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Max revs on a 4.236 9 months 3 weeks ago #2705

We too have a 4-236 and run normally at 1400, 1600 if we are in a hurry, typically cruise at 5.5 to 6 knots.
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Max revs on a 4.236 9 months 3 weeks ago #2706

  • GinoDelG
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We have a MaxProp and have max revs at 2500. We generally run about 1800 to 2000 for 7-7.2 knots in calm seas and burn 1.5 g/h. How much do you burn?
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Max revs on a 4.236 9 months 2 weeks ago #2707

We have almost the same max revs and run at about the same revs as you do. Our fuel consumption is between 11/4 and 11/2 an hour .
Thanks
Mike
Last Edit: 9 months 2 weeks ago by Stargazer44.
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Max revs on a 4.236 6 months 34 minutes ago #2742

  • GinoDelG
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We have a Brewer 44 with a Perkins 4.236 and Maxprop. We burn 1g/hr at 1500 and 1.3 at 1800 and 1.5 at 2000. At 2000 we do 7.5 knots in flat water with clean bottom.
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Max revs on a 4.236 1 week 1 day ago #2845

  • GinoDelG
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A more careful analysis shows we burn 1 g/h at 1700 rpm swinging an 18” MaxProp with 1.8 gear ratio. We do about 6.8 knots at that rev in flat water.
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