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  1. W

    engine height with twins

    checking my engines the other day, and I became curious and would appreciate the knowledge of others. With a single engine on a v-hull, i can understand the ventilation plate should be even with the bottom of the boat or just slightly higher. However, with twins on a v-hull, you have two...
  2. W

    Props and ventilation/cavitation

    Have been trying to get a definite answer on this for a while now. I'm currently running a 25 Mako with twin Opti 150's swinging 17p 4 blade Merc Offshore props (came with it). At WOT, I'm running about 40kts at 5600rpm. Makes good turns and doesn't break in tight turns. I'm one hole from...
  3. W

    Raw Gas coming from vents in foot of Opti 150

    Now I'm really perplexed. While working on fixing a trim unit problem on my 1998 Optimax 150, I read in the manual that the fuse that protects the trim unit also protects the instruments. I checked the fuses on the side of the engine, but just to be sure, I turned the ignition switch to on to...
  4. W

    Optimax 150 Power Tilt Problem

    Howdy...new to the board, and I did try a search but couldn't find info pertainent to the Optimax's. I have a 25 Mako with twin 1998 Opti 150 Saltwaters. Here's the problem. Planned to head to the water this morning. Trimmed up both engines from the throttle trim control switches. Starboard...
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