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 Catalina/Capri 25/250 Sailor's Forums
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 Outboard Overhaul		  New Topic  Topic Locked
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Jared
1st Mate

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USA
70 Posts
Initially Posted - 04/11/2005 :  14:01:47  Show Profile  Visit Jared's Homepage
I just bought a dinghy and got an older 3.3 hp Evinrude outboard with it - maybe 15 years old? The outboard may have not been run for about a year or so and still had gas in it. So, I know I should get rid of the gas and put clean fuel in it. I also heard it would be good to clean the carberator out since it had old fuel in the tank.

How difficult a job is it to (in general) take an old engine and turn her up to be in good shape to run? Is all that I have to most likely do change the lower unit oil, clean the carberator, check the spark plugs and go? How do i go about cleaning the carberator if this is a job that an amateur can do? Anyone have any tips?

Thanks.
Jared Jamison
86 C25 #5354 FK/TR "Saba Rocks" Richmond, VA
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ClamBeach
Master Marine Consultant

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3072 Posts
Response Posted - 04/11/2005 :  14:27:30  Show Profile
Most auto parts stores offer spray-in carburator cleaner... As to the condition of the outboard in general, darn hard to tell... as maint/abuse/use is unknown to you.

I'd take the approach you've listed... plugs, clean fuel, spritz out carb, lower end lube and see what you get.
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frankr
Captain

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256 Posts
Response Posted - 04/11/2005 :  16:04:49  Show Profile
Also make a stand for it and try it out on land in a tub of water or use the ear muffs with a hose before you waste time mounting and trying it on water.
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JimB517
Past Commodore

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USA
3285 Posts
Response Posted - 04/11/2005 :  17:50:24  Show Profile  Visit JimB517's Homepage
pull the main jet and clean it out with carb cleaner like B-12 Chemtool. Clean the needle jet (inlet to the carb float bowl). If you can remove the carb, these will be easier. Else, the carb main jet can be accessed from the bottom of the carb body. Take off the fuel lines and blow them out.

When you do this, any old gas is going to come flooding out of the carb so don't be over the water.

Change and gap plugs.

Fire it up on new gas, I'll bet its OK or at least runs for a few years.

If it doesn't have a good stream of cooling water, change impeller and thermostat.

PS. - the HARD part is if any bolts are seized. Use liquid wrench and give it time to work. Use anti-seize when re-assembling.
Edited by - JimB517 on 04/11/2005 17:51:17
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atgep
Master Marine Consultant

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1009 Posts
Response Posted - 04/11/2005 :  18:41:40  Show Profile
With a 2 stroke you always want to teardown the carb as the crud will reduce the size of the openings. This results in a lean condition that will ruin the engine as it uses the fuel for lubrication.

All of the described above is doable with a little bit of knowledge. You might try Napa for your parts. Ask for the Sierra catalog. It has outboard parts for cheaper than most dealers.

I would do the following in this order.

1 put fresh gas in it and see if it runs.
2 If it does or if it at least has good compression, rebuild the carb
3 it is runs well after this, change the water pump impeller.

A maintained outboard will last until it corrodes through, burnes up, or leaves the owner stranded (first offense punishable by death!)

Good luck, Tom.
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atgep
Master Marine Consultant

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1009 Posts
Response Posted - 04/11/2005 :  18:58:11  Show Profile
Here is a pretty good tutorial.

http://www.maxrules.com/fixtuneitup2.html
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gnorgan
Admiral

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USA
563 Posts
Response Posted - 04/12/2005 :  00:21:53  Show Profile
A suggestion for the old gas (and I don't know how much gas you have) would be to pour it out into a gas can using a funnel (don't do this near the gas-fired water heater in your garage!!) and then pouring it into your truck or car gas tank. I read this somewhere and that it won't hurt your vehicle's motor.
Just my 3 cents worth...
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Jared
1st Mate

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USA
70 Posts
Response Posted - 04/12/2005 :  08:18:43  Show Profile  Visit Jared's Homepage
I emptied the old fuel last night into an empty gas can. There is about 1/2 gallon or less. Would it be better to burn it in my car since it is more diluted or put it in my lawnmower a little at a time because a new lawnmower only costs $100 - vs. that much for the guy to run " computer diagnostics" (what happened to mechanics?) at the shop if it hurts the car.

I took the carb off and drained the lower unit and will replace that oil and the impeller. There is some sticky looking old fuel on the carb, so I should clean it. Can I clean the jets without taking the carb apart by using the spray-in kind? Does anyone know the gap for the plugs on an old Evenrude 3.3 hp outboard?
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tinob
Master Marine Consultant

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USA
1883 Posts
Response Posted - 04/12/2005 :  08:46:53  Show Profile
Jared, my two cents worth...is to try firing it up without doing anything to it...you might get lucky...you'll never know if you jump right in and rebuild a machine that doesn't need it. I also would follow the advice given to do this out of the water.

Val on the hard DAGNABIT
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Jared
1st Mate

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USA
70 Posts
Response Posted - 04/12/2005 :  09:26:16  Show Profile  Visit Jared's Homepage
Val... Yeah, that would have been smart. I tried starting the thing and it wouldn't fire up, so I emptied the fuel, took off the carb, etc. and then realized there is a switch to turn the fuel on - it was off, duh! Maybe it would have worked. The good thing about not knowing much is that I am always learning something! Figured I would go ahead and clean the thing now that it is apart.
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JimB517
Past Commodore

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USA
3285 Posts
Response Posted - 04/12/2005 :  10:40:53  Show Profile  Visit JimB517's Homepage
you can use an adjustable wrench to unscrew the main jet. Much easier to clean out of the carb. Don't forget the needle valve! Engine sure to flood and leak gas if this is blocked.
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Notice: The advice given on this site is based upon individual or quoted experience, yours may differ.
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