Just took delivery of a 2016 Bayliner 190DB w/a 150 Merc Four Stroke OB. Wife and I love the layout and amenities of the boat. It's my first non-fishing boat, and we bought it to be able to access the lake we moved onto last September (Lake Mendota, in Madison, WI).
I've been shaking it down the last few days, and last night I set out to really feel out the engine and trim. I only had maybe 400lbs of weight in it (me, dog, gas, anchors) beyond the bare hull. We had about a 12mph south wind.
I opened her up, and started playing with the trim. Ran against teh wind, and with the wind.
With the wind, best speed was 48mph @ 5200 RPM, trimmed up to just under a quarter. Any higher and I ventilated the prop (not fun at full speed!), and lower and RPMs and speed fell. The wake was essentially at the rear of the boat, maybe 1-2' ahead of the transom.
Against the wind, I couldn't do any better than 44mph, and that was at a slightly lower trim, but I couldn't hold it long as it was too rough, and I had to trim down almost fully to keep things sane.
Sunday, I was out with 6 people in the boat, and I couldn't get about 4600 rpm and 42mph, and couldn't trim up much without venting. To me, that was a pretty good speed given the weight, but the RPM seemed low.
My take away from all this, based on Mercury specifying a WOT of 5000-5800 is that the boat is slightly over propped. I can't understand why Bayliner would do that, since the use case for most of these boats is family-focused. I'd think if anything they'd underprop it to make sure you can get on plane when heavy or pulling people (which I'd think you'd find yourself doing often in a deck boat).
I ask this because I'm planning on getting a stainless prop, relatively soon. Mendota is a big lake, and I don't want to deal with getting stranded if I have a prop issue, so a spare is mandatory, imo. If I'm going spend $500+ on a prop, I'd like to make damn sure it's sized for the engine.
Also, I don't know the current prop size and pitch. I emailed Bayliner, they redirected that to my dealer, and the dealer didn't know and told me to look, which is fine except I forgot to look last night.
Anyone else see something similar with their 'liner?
Thanks!
I've been shaking it down the last few days, and last night I set out to really feel out the engine and trim. I only had maybe 400lbs of weight in it (me, dog, gas, anchors) beyond the bare hull. We had about a 12mph south wind.
I opened her up, and started playing with the trim. Ran against teh wind, and with the wind.
With the wind, best speed was 48mph @ 5200 RPM, trimmed up to just under a quarter. Any higher and I ventilated the prop (not fun at full speed!), and lower and RPMs and speed fell. The wake was essentially at the rear of the boat, maybe 1-2' ahead of the transom.
Against the wind, I couldn't do any better than 44mph, and that was at a slightly lower trim, but I couldn't hold it long as it was too rough, and I had to trim down almost fully to keep things sane.
Sunday, I was out with 6 people in the boat, and I couldn't get about 4600 rpm and 42mph, and couldn't trim up much without venting. To me, that was a pretty good speed given the weight, but the RPM seemed low.
My take away from all this, based on Mercury specifying a WOT of 5000-5800 is that the boat is slightly over propped. I can't understand why Bayliner would do that, since the use case for most of these boats is family-focused. I'd think if anything they'd underprop it to make sure you can get on plane when heavy or pulling people (which I'd think you'd find yourself doing often in a deck boat).
I ask this because I'm planning on getting a stainless prop, relatively soon. Mendota is a big lake, and I don't want to deal with getting stranded if I have a prop issue, so a spare is mandatory, imo. If I'm going spend $500+ on a prop, I'd like to make damn sure it's sized for the engine.
Also, I don't know the current prop size and pitch. I emailed Bayliner, they redirected that to my dealer, and the dealer didn't know and told me to look, which is fine except I forgot to look last night.
Anyone else see something similar with their 'liner?
Thanks!
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