Posts: 7
Threads: 1
Joined: Sep 2023
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Home Port: Newport Beach CA
Vessel Info: 1989 Tiara 3600 Open, MerCruiser 8.1L Horizon High Output 425's.
The boat was repowered with Mercrusier 8.1 High Output gassers rated at 425 HP and tuned for more low end torque. The engines currently have 480 hours on them. Anyone familiar with the powerplants and opinions? Boat is going to be strictly short distance pleasure use. Harbor cruising and weekend Catalina / local costal trips.
Posts: 463
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Joined: May 2018
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Home Port: Ashtabula, OH
Vessel Info: 1986 Tiara 3600 Open, Crusader 454's
I have an 86 3600 with the Crusader 454's (350 HP, later revised to 320 HP). Your boat should run well with the 8.1 HO's.
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Posts: 463
Threads: 3
Joined: May 2018
Reputation:
7
Home Port: Ashtabula, OH
Vessel Info: 1986 Tiara 3600 Open, Crusader 454's
I'm turning 18x21 three blade props. 3000 rpm I'm running about 19 knots, 3200 21 knots in fair seas. That is also on the original motors, with over 4400 hours now. I'm also on Lake Erie. They are really well-built boats. I'm surprised how well mine has held up.
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