What you adding to your gas

cobalter
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What you adding to your gas

Post by cobalter » Mon Jun 06, 2016 12:21 pm

Are most of you using a fuel additive when refueling such as Star Brite, Stabil, etc? I have a 210 with 320 HP. There is only one place I can get non ethanol gas and rarely near any of the lakes I got to. Going to Lake Powell in July and they have 87 octane only I think. I have not checked with my dealer yet but will give them a call.

jhnmdahl
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Re: What you adding to your gas

Post by jhnmdahl » Mon Jun 06, 2016 1:15 pm

I put in Sta-bil late in the season when I know I'm going to be storing the boat with gas in it, but don't during the course of the summer when I know I'll be refilling within a few weeks/months.

320 HP in the 210 has to scream - what kind of top speed do you get?

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cobalter
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Re: What you adding to your gas

Post by cobalter » Mon Jun 06, 2016 2:37 pm

With 120 hrs on it I'm barely getting 53-55. I hoping it will loosen up some more. I'm looking into re-propping it since my wife and I don't do water sports we don't need as powerful a hole shot. But that may be too expensive for what we might gain. Would like to get 60 mph. Our 226 back in 2002 would do 60 mph with 300 HP/5.7

As far as fuel additive my dealer said unless I'm running 91 non ethanol to use the Volvo Penta gas additive each fill up.

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Re: What you adding to your gas

Post by jhnmdahl » Mon Jun 06, 2016 2:59 pm

Looks like Cobalt says 55mph is about right for that setup.
210props.jpg
210props.jpg (188.05 KiB) Viewed 195 times
I have a 210 with the V8-225, and it gets on plane about 3.5 seconds (faster than they say) and its top speed is about the 48mph they predict.

I should also note that I don't put additive in every tank, but do use nonoxygenated gas every time.

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cobalter
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Re: What you adding to your gas

Post by cobalter » Mon Jun 06, 2016 3:06 pm

John, could you somehow enlarge that chart or send its source, I can't read it, Thnks

cobalter
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Re: What you adding to your gas

Post by cobalter » Mon Jun 06, 2016 4:03 pm

I think I can get the prop info. I mistakenly said my boat had 100+ hrs. but it is only 20 so it will loosen up some more and then I can pursue re-propping or not.

Big Block Power
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Re: What you adding to your gas

Post by Big Block Power » Mon Jun 06, 2016 6:20 pm

I thought these engines were set on running on 87 octane. They say you can use 91 and you may notice a bit of performance increase. I run 89'ethanol free or 91 ethanol free. It's easy to get here. I noticed no performance change between the two.just a cost.lol. In Missouri by table rock everything had ethanol in it except for the marina. I added mercury ethanol treatment to every fill if it had ethanol. Thank goodness that was only once. I used marina gas due to the boat ramp was like a 90 degree incline and my boat darn near pulled me into the water going down hill. I use stabil at the end of the season for storage.
Props I'm thinking of switch to a 4x4 set up. More efficient.
2003 Cobalt 220 8.1gxi
Neenah Wi

cobalter
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Re: What you adding to your gas

Post by cobalter » Mon Jun 06, 2016 7:57 pm

Agree, was just re-reading my owners manual and it recommends Volvo Penta fuel stabilizer at every fill when using an ethanol gasoline. I'm sure the others would work just as well. And I would think it not necessary is you can get ethanol free gas. I did not see anything about the grade of fuel but I'm sure these motors must be capable of running on 87 even if higher might be better.

I'm not certain about your particular boat but for mine they do not recommend a four blade. They do have there uses and I'm sure you have done some research on this.

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Re: What you adding to your gas

Post by Big Block Power » Mon Jun 06, 2016 8:39 pm

That 226 you used have was one of the fastest hulls Cobalt made. Not sure why Volvo Doesn't make a four blade for the dps drive. Every prop is designed to do something very specific.just because Volvo doesn't recommend something doesn't mean I wouldn't try it. I tried so many props on my old boat and if I didn't try them I wouldn't have not found the one that worked for me. If you just go up in pitch for speed you will not run the correct wot rpm range and your hole shot will suffer. You could always call b blades and talk to them and they can work your existing props to do what you want and keep the rpm you need to perform correctly. We really don't have many choices with f series if that's what you have.
2003 Cobalt 220 8.1gxi
Neenah Wi

jhnmdahl
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Re: What you adding to your gas

Post by jhnmdahl » Tue Jun 07, 2016 10:40 am

cobalter wrote:John, could you somehow enlarge that chart or send its source, I can't read it, Thnks
Cobalter, it's a blurry screen shot someone sent to me to start, but if you right click and select "view image", it should be slightly bigger and easier to read.

John
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