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Go Back   SailNet Community > On Board > Gear & Maintenance
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  #1  
Old 01-24-2010
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Generaters & outboards

Lots of complaints about outboards and fuel but I don't see any about generaters and fuel. Why, aren't the moters very similar.

Second ? Anybody have experience with a dual fuel (gas & propane) or a propane generater. There is at least one propane fueled outboard in development so it might become possible to have genny,outboard and barbecue all propane powered.
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Old 01-24-2010
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Wouldn't recommend getting or using a propane genset, since getting propane is more of a PITA than getting gasoline or diesel.

Yes, the small gasoline engines used in outboards are pretty similar to those used in generators, and you won't see too many complaints, since most marine use gensets are DIESEL.

Also, a lot of the complaints about the new Ethanol-blend fuels and outboard motors has to do with fouling and other damage caused by the ethanol in the fuel. One cause was that many outboard powered boats with fixed fuel tanks had issues since the ethanol would damage the fiberglass fuel tanks and the resulting sludge would cause the carbs and jets to gum up or clog. Some of the older fuel lines and gaskets were also not ethanol resistant and caused similar problems.
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Old 01-24-2010
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RXBOT,

Sometime back I was looking at the possibility of getting a generator for home use powered by natural gas. The dealer recommended against it saying he had complaints about hard starting. In fact he had one, barely used, on the floor that a customer returned. Don't know if propane would present the same problem? Suggest asking the dealer about it.

Dabnis
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I was thinking of the small portable gens like Honda 1000,2000,3000. No one complains about fuel problems with them. I know gas has more BTU's per pound so you would use more propane than gas for same result. B ut it would seem convenient to have barbecue and generater on same fuel.
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Old 01-25-2010
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If you carry an outboard for the dinghy or use one for the main engine, then carrying gasoline isn't much of an issue, since you're already carrying it.

If you have a diesel main engine, then getting diesel powered genset makes sense.

It doesn't make much sense IMHO to get a genset that runs on propane, since it would require more fuel than a gasoline or diesel genset for the same runtime, and the fuel is more difficult to acquire.
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Old 01-25-2010
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Just a quick note, for those that do not know it, I have found small outboards (9.9 and under... do not have 1st hand on the larger) are sensitive to the ethanol, especially it seems to be that the fuel seems to go 'bad' after a month or two. As many of you know, it can be hard to go through a tank of fuel on the outboard due to efficiency. We have found that additives help, but still rely on smaller quantities of fuel (do not fill up the tank).

Just some thoughts as I suspect that any small engine will show similar issues, due to the small amount of fuel she burns.

Brian
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I'd point out that CD's point about ethanol blend gasolines going bad more quickly is a key point to make. The ethanol is highly hygroscopic, and causes problems as the ethanol/water will separate out once the water reaches about 1.5% by volume. This is important as the ethanol is the primary octane booster in ethanol blend gasolines, and will leave the remaining fuel with about 82 octane, which is too low for most marine engines to burn properly.
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Well

The issue is the biggest in small 3 STAR motors(all new outboards) as they have to use carbs due to cost and they have to have tiny fuel jets.

You are supposed to run them empty if not in use

I have a 2 STAR 4HP motor and have 0 issues useing a tank of fuel over a season as small outboard tanks are sealed when not in use and dont take in much water compared to a large tank with a vent
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Quote:
Originally Posted by tommays View Post
Well

The issue is the biggest in small 3 STAR motors(all new outboards) as they have to use carbs due to cost and they have to have tiny fuel jets.

You are supposed to run them empty if not in use

I have a 2 STAR 4HP motor and have 0 issues useing a tank of fuel over a season as small outboard tanks are sealed when not in use and dont take in much water compared to a large tank with a vent
You hit the nail on the head ! Small jets
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FWIW, I have used Berryman B-12 fuel additive on 2 and 4 stroke engines for many years with no fuel related problems. Be carefull , it will melt some plastics and paint. Still necessary to drain the carb if not using for a while. No affiliation with Berryman, just a user.

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