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Go Back   SailNet Community > General Interest > General Discussion (sailing related) > Another (stupid?) outboard motor question
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Thread: Another (stupid?) outboard motor question Reply to Thread
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Topic Review (Newest First)
05-10-2013 09:34 AM
blutoyz
Re: Another (stupid?) outboard motor question

Quote:
Originally Posted by Minnewaska View Post
Another thought.

If you find you need any choke to start a warm engine, something is wrong.
Good point here^^
05-10-2013 12:47 AM
ShoalFinder
Re: Another (stupid?) outboard motor question

...and don't run Ethanol gas in a 2-stroke. Inconsistant problems will manifest in ways that will have you chasing every possible engine problem you can think of, only to discover that your gas is the culprit. People have various levels of success with Ethanol gas by using additives. I learned the hard way that it's just easier to avoid Ethanol.
05-09-2013 05:56 PM
Minnewaska
Re: Another (stupid?) outboard motor question

Another thought.

If you find you need any choke to start a warm engine, something is wrong.
05-09-2013 05:14 PM
kellysails
Re: Another (stupid?) outboard motor question

Quote:
Originally Posted by blutoyz View Post
To the OP
You won't find a procedure...every engine has a "personality". Experiment with different conditions and in a month you will know when it wants choke.
++1 on this. So extremely true.
05-09-2013 11:28 AM
dabnis
Re: Another (stupid?) outboard motor question

Quote:
Originally Posted by Minnewaska View Post
Dirty spark plugs change outboard behavior. I change them out every couple of years and clean them annually.

As a cheat, I will also occasionally spray ValvTects Marine Motor de-Carb through the intake. Smokes like a forest fire, while you're doing it, and its not just a dainty spray and you're done. You spray the whole can. I think it works, makes me feel like I did something anyway.
I have been using this:

B-12 Chemtool® Carburetor, Fuel System and Injector Cleaner | Berryman Products

for 30 years in anything that burns gasoline with no fuel related problems.

Paul T
05-09-2013 08:13 AM
Minnewaska
Re: Another (stupid?) outboard motor question

Dirty spark plugs change outboard behavior. I change them out every couple of years and clean them annually.

As a cheat, I will also occasionally spray ValvTects Marine Motor de-Carb through the intake. Smokes like a forest fire, while you're doing it, and its not just a dainty spray and you're done. You spray the whole can. I think it works, makes me feel like I did something anyway.
05-08-2013 09:31 PM
outbound
Re: Another (stupid?) outboard motor question

If this is a change in behavior ?Is it worthwhile to take the carb down and make sure it doesn't have junk in the holes or is not tuned correctly.?Make sure your gas is ok. Last summer had trouble with an old Yama ( early 80's). Was filling it from the same gas container that sat for awhile. Needed choke to start everytime. Ran through that container and all was peace in the valley.
05-08-2013 09:12 PM
Racecase
Re: Another (stupid?) outboard motor question

Quote:
Originally Posted by Sal Paradise View Post
Actually the fuel in the air condensates against the cold cylinder walls and this results in a very lean air -fuel mixture.

So we richen it up with the choke.
That and the colder air is denser so you need more fuel to achieve proper stoichiometric fuel/air ratio.
05-08-2013 07:42 PM
Sal Paradise
Re: Another (stupid?) outboard motor question

Quote:
Originally Posted by chucklesR View Post
IMHO 'cold' means cold air, not cold engine. I try for a start without choke, then choke if it doesn't start.
Actually the fuel in the air condenses against the cold cylinder walls and this results in a very lean air -fuel mixture.

So we richen it up with the choke.
05-08-2013 11:05 AM
krisscross
Re: Another (stupid?) outboard motor question

Most people operate the choke in fully open or fully closed position. That is not the best practice. A lot of times when the weather is fairly warm (mid 50's) half choke is the best way to go when starting. If you use too much choke you will likely flood the motor and have a hard time starting it. Find the right amount of choke for your motor and really listen to how it reacts.
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