5 horse boat motor

#1 06/25/08, 01:16 PM

It has not seen water or been run for at least 30 years but ran good back then.

It probably was setting all this time with some gas in it.
Probably is pretty well gummed up.

What steps should be taken to clean it up to see if it will run again?

sugarbush · #2 06/26/08, 09:16 AM

What brand?

1.Take the bowl off of the carb and drain it, but be careful not to loose the needle valve off of the float.
2. fill a barrel with water and mount the outboard to the side with the prop well submurged.
3. fill with the right mix of fresh gas.
4. inject a little gas into the cylinder with a syringe or turkey baster by removing the spark plug.
5. replace sparkplug and attempt to start engine.

That is where I would start.

OkieDavid · #3 06/26/08, 09:42 AM

Go ahead and invest in a new water pump prior to running it....after 30 years in the dry you would be lucky to have any rubber vanes left on it most likely.

#4 06/26/08, 02:37 PM

Quote:

Originally Posted by OkieDavid

Go ahead and invest in a new water pump prior to running it....after 30 years in the dry you would be lucky to have any rubber vanes left on it most likely.

Are water pumps for older motors easy to find?

Where would I look?

Can you provide a link?

Ed Norman · #5 06/26/08, 08:25 PM

I just got done reworking a 1955 Evinrude 3 HP outboard. I had to oil the rope starter mechanism to get it to retract. Then I found the pistons moved freely, but I squirted a little 2 cycle oil in each one to lube them before the gas got to them. It also helps compression with old rings until things warm up. I replaced the coils, plugs, points and condensers. Then I rebuilt the carb. All the parts were about $90. I put it in a stock tank because I read that they usually cavitate badly in a barrel and won't run smoothly. It started and I adjusted the carb and got it running nice. But I noticed the impeller wasn't pumping water. I shut it down and got busy and it sat in the tank for 3 days. I came back and started it and it pumped great. I guess a long soak loosened the impeller up. I do have a new one that I can install later.

MushCreek · #6 06/27/08, 03:36 PM

You'll want to look at the inside of the gas tank, too. Unless it was drained, it will be varnished up. The whole fuel system, including the gas line will need to be cleaned out. I would check for spark first. Coils can go bad from sitting. Parts availability will depend on brand and age- some are widely available, some are non-existent. I have vintage outboards going back to 1922, and you have to get creative sometimes.

Ed Norman · #7 06/27/08, 05:45 PM

One thing I found out. NAPA Auto Parts has a marine catalog and they were able to get my stuff shipped in cheaper than any marine dealer.

OkieDavid · #8 06/28/08, 08:38 AM

Quote:

Originally Posted by GrammaV

Are water pumps for older motors easy to find?

Where would I look?

Can you provide a link?

Sorry so long to respond, been out of pocket. The water pump is mounted in a cavity where the lower drive unit section attaches to the upper engine section. Basically the engine will appear as two sections (one normally under water and one normally above water) that are bolted together. With the engine laying on it's side, remove the bolts holding the two sections together and GENTLY slide them apart. I say gently because the drive shaft is splined and there will be another transmission shaft that shifts the lower unit from neutral, forward, reverse that will have a collar w/bolt that will need to be loosened as you separate the two sections. Once the sections are apart, look at the bottom of the upper section and you will see the water pump housing (the drive shaft runs through the center of the water pump and operates it). A couple of bolts and slide the pump housing off.....The pump is simply a rubber "spider" that has several rubber vanes. As long as you have at least the center and one vane left any marine shop can provide a water pump....Last one I bought was $7.00 so they are pretty cheap. Don't have a link but if you google "outboard water pump replacement" you should be able to find an exploded diagram of "some" boat motor that lets you see everything.

David

MushCreek · #9 06/28/08, 08:56 AM

It really depends on what kind of motor you have- some are readily available, some are impossible. And there are several possibilities for where the pump is located, and how easy it is to get at. For more answers, got to aomci.org, and on the left you'll see a heading called 'Ask-A-Member'. They'll be glad to help you out, but they will need to know the brand and model of the motor. I could probably help you more if I knew what you where working on. My '57 Johnson requires taking off the powerhead before you can drop the lower unit. My older td-25 has the pump right in front of the prop. My '22 Johnson has a piston pump!