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Old 29 July 2013, 12:12   #1
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Country: UK - Isle of Man
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Transom Rating - Engine size

I take it the rating on the transom for HP is a pretty good guideline to stick by?!

Mine is rated for 100HP....would sticking a 115 on there be silly?
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Old 29 July 2013, 12:15   #2
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....only when it came to claim from your insurance company, if they hadn't confirmed all ok in writing.
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Old 29 July 2013, 12:17   #3
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Originally Posted by Barrowboy View Post
....only when it came to claim from your insurance company, if they hadn't confirmed all ok in writing.
I hadn't even thought of the insurance actually!

I've heard horror stories about boats that have been overpowered and basically wreck them. I wouldn't be sticking a 150 or anything on it, just wondering what difference that 15HP would make.
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Old 29 July 2013, 12:25   #4
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It's more about power-to-weight ratio rather than just outright horsepower; you might find 15 extra hp of less help than (say) losing 15kgs of weight in the power unit - assuming you're looking at various engine options?

Do make sure that your insurance company is happy to confirm IN WRITING that they're happy to insure you for an engine that exceeds the hp limit stated on the CE plate (or manufacturer's recommendation if pre-RCD boat) before you commit to buying it though.
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Old 31 July 2013, 12:39   #5
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If both engines weights same not an over weight issue, but probably a legal issue...

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Old 31 July 2013, 15:03   #6
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If this is for the DR 520 I suspect it will be too much. My rib was rated to 80 hp but it can chine walk with 60hp. as a result I cannot use all of thepower available to me. the dr 520 was usually supplied with a 75 hp engine. By the reports I have read 75 hp was more than adequate for a DR520
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