What you adding to your gas

cobalter
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Re: What you adding to your gas

Post by cobalter » Wed Jun 08, 2016 7:22 am

No problem John, I get the gist of it. Yesterday had the boat out for the first time this year. At 23 hours it ran 52 mph at 5100 RPM at 1,000 ft. It just seems it should get closer to 55 as you suggest. I know it will loosen up a bit more but 3 mph, I don't know. Not to be fixated on the speed but this boat with 20 more HP is a far cry from the 226 with 300 HP that would go 60. Maybe this boat is just designed for water toys.

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Re: What you adding to your gas

Post by jhnmdahl » Wed Jun 08, 2016 9:28 am

For 3 miles per hour, little things like a clean hull and using synthetic oil can make a slight difference, but the biggest difference I've noticed is that top RPM seems to vary a little bit from boat to boat. If I can go 5000rpm and you can go 5100, I'm at a significant disadvantage.
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cobalter
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Re: What you adding to your gas

Post by cobalter » Wed Jun 08, 2016 11:33 am

Cobalt/Volvo Penta says use mineral oil/dino on my engine until 100 hrs. As to the hull, since my boat is new I'm going to just use a liquid boat soap and a wax/sealer on the hull. No need for anything stronger I don't think.

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Re: What you adding to your gas

Post by jhnmdahl » Wed Jun 08, 2016 12:34 pm

I think you're exactly right on the hull - keep it clean, but be reasonably gentle to it.

I've seen conflicting information from Volvo Penta about break-in hours, ranging from 20 hours to 100 hours on mineral/dino oil (my engine manual from Volvo says 50 hours). What does remain consistent is their advice regarding max RPM, varying RPM, and other stuff during the first hours on the water. I hit a little over 50 hours last summer on a new boat, and decided to change to synthetic oil (Mobil 1 15w-50) before winter storage.

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Big Block Power
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Re: What you adding to your gas

Post by Big Block Power » Wed Jun 08, 2016 5:12 pm

Yes on the soap. Good wax or polish works great.
What oil do they use from the factory and recommended weight? I thought the oil they were using was a synthetic oil. I know mine is older but I use there 5w40 I think it is. Being in warranty I'm sure it says to use there oil.not sure if it says this weight or blend or better.If it does I would switch over. When I was reading on what the Volvo owners were using the Mobil oil was very popular. I'm a manufacturer guy so I went with Volvo.It's so tuff to compare your 210 to the 226 hull. Thats like when comparing it to my 220. I have 8.1 and just pushing 57. Sucks but that boat rides so much better than a 226. Have to give up something. I had a 5.7 gxi 320 hp in my last 220 it ran 54 no problem.props make a big diff.the props on that boat were like new. My boats props now have been rebuilt and I think I lost some performance because of that.
2003 Cobalt 220 8.1gxi
Neenah Wi

jhnmdahl
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Re: What you adding to your gas

Post by jhnmdahl » Wed Jun 08, 2016 10:20 pm

Oil spec for mine at least 30 weight or heavier, with no 0W-30 allowed (but 5W-30, etc. are OK). Volvo Penta's own oil in Europe is supposedly Mobil 15W-50, so I went with that given it's fairly cheap at the local Wal-Mart. I think they want SL spec or better too if you don't use oil from a Volvo bottle.
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cobalter
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Re: What you adding to your gas

Post by cobalter » Thu Jun 09, 2016 1:12 pm

I clarified several things from my Volvo Penta engine manual and the dealer for my 2016 5.7 320 HP. Not all may apply to your particular engine or year. For my engine I stay with the mineral oil until 50 hrs. then it changes to full synthetic and a dealer inspection. The manual also recommends a fuel stabilizer on every fill up if using ethanol fuel and of course for winter storage. Also, the 87 octane is ok but the higher octanes may contain the more useful additives and engine may have a bit more power. I'm guessing it's user choice on a stabilizer each fill-up but that was what the manual suggested. If 87 was my only choice I probably would for sure.

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Re: What you adding to your gas

Post by jhnmdahl » Thu Jun 09, 2016 1:20 pm

Using fuel stabilizer should be a higher priority when there's ethanol in the gas (E10), but simply having lower octane shouldn't affect the fuel's longevity. My manual also talks about 87 octane being just fine (I think the compression ratio is 9.4:1), but that the engine is computer-controlled and can advance timing to squeeze a little more power out of higher octane fuel.
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Re: What you adding to your gas

Post by cobalter » Fri Jun 10, 2016 8:57 am

Totally agree, no need for stabilizer in any octane fuel unless E10.

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Re: What you adding to your gas

Post by Ytmsn » Mon Jan 02, 2017 10:56 am

I use Seafoam on every 3rd fillup. Incredibly good stuff. I rarely run below 1/2 a tank before I fill. Occasionally I'll get to 3/4 empty, and always feel anxiety when I do, just one of my quirks I guess.

Seafoam stabilizes the fuel and keeps the system clean. Its also really good at removing any moisture from condensation. Our climate is pretty humid.

Of course, this has been with all my past boats , but I'll be doing the same thing with my 240 this spring. We're getting REALLY anxious to get her on the water!

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