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Merc 496 Mag HO/ Volvo 8.1 430 hp vs 496 Mag/Volvo 8.1 380 hp


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Hey guys, we are looking to move up this coming year, and we were looking into a used sig 310/330, but the larger costs of ownership are making us have some second thoughts. So, we are also considering staying in the large runabout category and one of the possibilities is a 275 SSi.

Our 265 has the 375 hp 496 Mag, which we are happy with, but we are hoping to find a 275 SSI with a 496 HO or volvo 8.1 430 hp engine. What is the difference in maintenance and reliability for the Merc 496 HO/volvo 8.1 430 hp vs. the standard 8.1 (375hp/380hp) variants? Do they need any periodic valve adjustment or cam maintenance? Do they need bottom end and top end re-builds at 300 to 500 hours like the 525?

Thanks for any information you guys can give me! (Especially if you currently own a boat with one of these engines).

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Hey guys, we are looking to move up this coming year, and we were looking into a used sig 310/330, but the larger costs of ownership are making us have some second thoughts. So, we are also considering staying in the large runabout category and one of the possibilities is a 275 SSi.

Our 265 has the 375 hp 496 Mag, which we are happy with, but we are hoping to find a 275 SSI with a 496 HO or volvo 8.1 430 hp engine. What is the difference in maintenance and reliability for the Merc 496 HO/volvo 8.1 430 hp vs. the standard 8.1 (375hp/380hp) variants? Do they need any periodic valve adjustment or cam maintenance? Do they need bottom end and top end re-builds at 300 to 500 hours like the 525?

Thanks for any information you guys can give me! (Especially if you currently own a boat with one of these engines).

The HO Merc has a stronger Bravo III-X drive as standard. Better fuel mapping with the PCM-555 processor, and a very large raw water pump. The impeller is harder to change than the Volvo, but you will get an honest 3 to 4 years out of a single rubber element as long as you winterize properly. Cams are both roller/hydraulic so no periodic adjustments required.

W

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