Golerud":1m06usc4 said:
I am looking at a 2008 Venture 23 that is for sale on the west coast. It is powered with a Honda 90. The boat is rated up to 150 HP so I am wondering if the vessel is underpowered with the 90 HP Engine. Do any of the C-Brats have any experience with this setup ond/or opinions as to how it would perform?
The BF90 on the V23 will be sort of the marine equivalent of a 4-banger in a commuter car. As long as the boat is fairly light it will get the job done and it won't be a dog. But it will suffer quite a lot with the addition of much weight to the boat. So it really depends on where you'll use the boat and what sort of load you'll have aboard.
Because there's a Honda on there now the easiest trade out is to another Honda since the rigging is all in place but it's not terribly more work or expense if you find another brand engine you like better.
The Honda BF115D, BF135, and BF150 are all the same engine (block). The biggest difference in the line is in the BF150 since it has V-TEC (variable valve timing). That kicks in at 4,500 rpm, if you don't run the engine at 4,500 or above there's so little difference in the BF135 and BF150 you couldn't tell them apart without the decal on the hood.
The BF115 has 1 ft-lb less torque than the BF135 and 2 ft-lbs less torque than the BF150...for all intent and purposes, the same.
Peak torque on the BF115D is at a low 3500 rpm so it's ideal for a hull like the V23 (the BF135/150 is at 4,000). Peak horsepower on the BF115D comes in at 5,250...just slightly lower than the 5,500 on the BF135. The BF150 cranks out 160-hp at 6,000 rpm.
The BF115D has the best specific fuel economy, which means it uses less fuel to produce one horsepower than the BF135/150 (that's a design thing, not a user thing).
Unless you're looking for a higher top end the BF115D is well worth looking at since in rpm up to about 4,000 the BF115D, BF135, and BF150 are hard to tell apart without a scorecard.
Since there are incremental price increases between each horsepower point I'd look at each and decide what would be the best choice for your needs (different at 7,000 feet, or on the coast, or inland).
And don't discount the 90 until you sea trial it and get some hard numbers on rpm, speed, and fuel burn if you're not planning on having a good deal of weight aboard.
Best wishes...