What do I have to do to old motor?

[gpfishingdude]

Could anybody tell me what all should be done to an old 9 1/2 hp outboard that has set for many years before I try to start it. I took the plugs out and sprayed some misting oil into the cylinders and when I pulled the starter cord it felt as smooth as it did 20 years ago. Should I just put fresh gas-oil in the tank and give it a try or would that do some kind of damage to something? Using water muffs of course. I already know to watch to see if the water pump is working when it starts.

 

[busted-bayliner]

Re: What do I have to do to old motor?

Could anybody tell me what all should be done to an old 9 1/2 hp outboard that has set for many years before I try to start it. I took the plugs out and sprayed some misting oil into the cylinders and when I pulled the starter cord it felt as smooth as it did 20 years ago. Should I just put fresh gas-oil in the tank and give it a try or would that do some kind of damage to something? Using water muffs of course. I already know to watch to see if the water pump is working when it starts.

read this may help
http://forums.iboats.com/showthread.php?t=158086

 

[Beek14]

Re: What do I have to do to old motor?

If possible, test compression first to make sure this is in good to go order. From there you should put in a tune up kit, new coils points and condensers. Check the spark plugs. You should also replace the water pump. A carburetor kit is necessary, as the gaskets after that long are shot, plus anything that was left in it should be cleaned. That should put you good to go. From there if anything else is needed, you will be able to figure it out.

 

[omcnut]

Re: What do I have to do to old motor?

i would at least change waterpump impeller and spark plugs after sitting thet long....coils and points condenser set should be considered as well as a carb clean safe is allways better than sorry.....you cant walk home from a boat ride

 

[gpfishingdude]

Re: What do I have to do to old motor?

I cleaned the fuel tank and hose and got fuel flowing. I set the motor up in a 5 gallon bucket of water on the motor stand. When it started it kind of fogged the neighborhood for a while. Water didn't come out of the outlet so I took the hose and shot some down the outlet. It pumped out good after that. When I quit running it and adjusting the idle I found some little pebbles of carbon in the water bucket. Does anybody know where the carbon could come from? It starts on the first pull now and runs real smooth.

 

[RogersJetboat454]

Re: What do I have to do to old motor?

Does anybody know where the carbon could come from?

Probably a couple of chunks in the exhaust port that dried out, and went out the leg. Did you have a look at the thread "busted-bayliner" posted? Have you changed the impeller yet? This is the single most important thing you can do for this engine. Impellers in constant use only last a few years. Even in storage the rubber takes a set and dry rots. It may seem like it pumps find now, but out on the water under load for only a few minutes to a few hours, it may let go and your engine starts baking in it's own juices.

The other thing to consider is the fuel lines, carb, and fuel pump. All probably have rubber that pre-dates the use of ethanol blended fuel. Ethanol blended fuel is fine to use in you engine, so-long as the rubber in the fuel system is a grade that is ethanol tolerant. Also good practice to clean out and rebuild the carb and fuel pump on an old motor anyway. May have some varnish, and crap left in them from the old fuel, and 2 stokes don't fare well when run lean from a dirty carb, or poor fuel supply.

 

[HighTrim]

Re: What do I have to do to old motor?

Probably a couple of chunks in the exhaust port that dried out, and went out the leg. Did you have a look at the thread "busted-bayliner" posted? Have you changed the impeller yet? This is the single most important thing you can do for this engine. Impellers in constant use only last a few years. Even in storage the rubber takes a set and dry rots. It may seem like it pumps find now, but out on the water under load for only a few minutes to a few hours, it may let go and your engine starts baking in it's own juices.

The other thing to consider is the fuel lines, carb, and fuel pump. All probably have rubber that pre-dates the use of ethanol blended fuel. Ethanol blended fuel is fine to use in you engine, so-long as the rubber in the fuel system is a grade that is ethanol tolerant. Also good practice to clean out and rebuild the carb and fuel pump on an old motor anyway. May have some varnish, and crap left in them from the old fuel, and 2 stokes don't fare well when run lean from a dirty carb, or poor fuel supply.

What he said. Change the impeller or your next thread will be, "Motor stopped working underway"

 

[gpfishingdude]

Re: What do I have to do to old motor?

Yes, I read the post by Busted-Bayliner and there is a lot of good advice there. I intend to change the water pump impeller and order a carb. kit and some other parts for spares. You never know how long parts for these old motors will be available. I don't remember for sure what year I bought it new, but I'm thinking around 1968. It was before they started making the 9 1/2 hp smaller and lighter.

 

[gpfishingdude]

Re: What do I have to do to old motor?

I got to thinking about what you said about the impellers dry rotting even in storage. Do they have a shelf life? How do I know the one I buy is going to be a recently manufactured one? I don't want to buy one from a dealer that has been setting on a shelf for 25 years. I looked at the model number it is 9R73B. So I think it is a 1973. I printed out the list of things to do from Busted-Bayliner so I can read through it while I'm working on it.