Bayliner 195 135 HP~~what kind of fuel useage?

[keninaz]

I found a really clean 2005 low hours 195 bowrider with the 135 HP Merc I/O.
I mainly am looking a the boat for fishing/cruising so I don't need lots of power.
Assuming standard prop and just getting up on plane where a boat is most efficient how many gallons a hour would you say it would burn.
I am guessing 3-5 GPH maximum but the last boats I owned were bigger with a lot more power.
Fuel is so expensive today.

 

[keninaz]

Re: Bayliner 195 135 HP~~what kind of fuel useage?

I know that but I did specify just above plane speed which is the most efficient with most hulls.

 

[keninaz]

Re: Bayliner 195 135 HP~~what kind of fuel useage?

Good point but in my experience with boats you still have to feed the larger displacement motors.
Does the efficiency of the larger motor/hull combo override the economy of the 4 cylinder?
The salesman was trying to tell me that the boat would do 42 MPH which as a fisherman I could really care less about. I did find that figure hard to believe however.

 

[Maclin]

Re: Bayliner 195 135 HP~~what kind of fuel useage?

Take this link then click on Test Results tab...


Playing - Bayliner 195 Classic Bowrider (Not in Production) - | Bayliner | Powered By BoatTest.com


Google and other search engines are good tools.

 

[keninaz]

Re: Bayliner 195 135 HP~~what kind of fuel useage?

OK, interesting.
The last larger boat that I owned was a 350 small block with merc I/O in a 21' cuddy and that was a few years back and it was a very heavy boat.
When I first got it the boat burned almost 12 GPH at a good cruise. Changed the prop out to a much better pitch and kept my throttle out of the secondaries of the carburetor and after I got it up on plane I could cruise for about 4 GPH. If I hit the RPM limit where I knew the 4 BBL was open I would burn around 7-8 just barely into the secondaries.
Adjusting the trim tabs made a great deal of difference on that boat too.

 

[keninaz]

Re: Bayliner 195 135 HP~~what kind of fuel useage?

Take this link then click on Test Results tab...


Playing - Bayliner 195 Classic Bowrider (Not in Production) - | Bayliner | Powered By BoatTest.com


Google and other search engines are good tools.

TNX, looked at the chart and as I thought at 2500 RPM is says 3.6 GPH and at 3000 RPM and 24 knots burning 4.1.
So my original estimate in post number one was pretty good.
And it appears that as you raise that throttle just like my last cuddy the GPH get up there.

 

[Slide]

Re: Bayliner 195 135 HP~~what kind of fuel useage?

Then it gets to be almost academic. It takes "X" amount of H.P. to move any given boat and load through the water. MANY times people discover that a larger engine gets as good or better fuel economy because they don't have to push (higher RPM) it as hard as they do a small engine. In this case that 4 cyl. may have to spin at 3000 to 3500 RPM to plane where a 4.3 V-6 may only spin 2000 to 2500 to do it.

Quoted for truth. I have a 502 in my Pachanga pushing around 500hp. My fuel economy is astoundingly good because I can cruise at 33mph GPS spinning 2200rpm.

As soon as I advance the throttle and open up the secondaries, though... you can watch the gas gauge go down

 

[NYBo]

Re: Bayliner 195 135 HP~~what kind of fuel useage?

Then it gets to be almost academic. It takes "X" amount of H.P. to move any given boat and load through the water. MANY times people discover that a larger engine gets as good or better fuel economy because they don't have to push (higher RPM) it as hard as they do a small engine. In this case that 4 cyl. may have to spin at 3000 to 3500 RPM to plane where a 4.3 V-6 may only spin 2000 to 2500 to do it.

Your numbers work only if there is a larger difference in gear ratio and/or prop pitch, which will probably be the case when talking 4 cylinder vs 8 cylinder (the latter wasn't offered in this hull); the difference is probably less with 4 vs 6. However, you can't necessarily equate the lower RPM of the bigger motor with equal or better fuel economy. Per revolution, the 8 will be pumping a lot more air/fuel mix than the 4. Additionally, motors have different "sweet spots" as far as most efficient load/RPM. There is also the weight savings of the 4 to consider, and it's right in the stern so it has a fairly big impact on performance on such a small boat. Lastly, with the bigger motor, you just know you're going to want to open 'er up!

Can you tell I'm really sick of winter and and going crazy watching the snow melt off of my boat?:grumpy: