Max revs on a 4.236

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2 years 7 months ago #2701 by Michael Collins
Max revs on a 4.236 was created by Michael Collins
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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2 years 7 months ago #2702 by Edward Schwiebert
Replied by Edward Schwiebert on topic Max revs on a 4.236
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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2 years 7 months ago #2703 by Michael Collins
Replied by Michael Collins on topic Max revs on a 4.236
Thank you that helps

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2 years 7 months ago #2704 by Philip Guest
Replied by Philip Guest on topic Max revs on a 4.236
We have the same, and turn at about 1300rpm for 7kts.

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2 years 7 months ago #2705 by Hannah Gardner
Replied by Hannah Gardner on topic Max revs on a 4.236
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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2 years 7 months ago #2706 by Gino & Carolyn Del Guercio
Replied by Gino & Carolyn Del Guercio on topic Max revs on a 4.236
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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2 years 7 months ago - 2 years 7 months ago #2707 by Michael Collins
Replied by Michael Collins on topic Max revs on a 4.236
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: 2 years 7 months ago by Michael Collins.

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2 years 3 months ago #2742 by Gino & Carolyn Del Guercio
Replied by Gino & Carolyn Del Guercio on topic Max revs on a 4.236
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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1 year 9 months ago #2845 by Gino & Carolyn Del Guercio
Replied by Gino & Carolyn Del Guercio on topic Max revs on a 4.236
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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