1964 seahorse 40 hp dogging

[Reifwj]

Ok, got the boat out for the first time. It didn't even get my 16 foot riviera on a plane. After 5 minutes it started to loose power and died in 10 minutes. I drifted to shore and waited 20 minutes and it started right up. Because the wind was so high, I ended up getting the prop in the mud and now wot, I looses all thrust. (spun prop) How do I test for this. I'm guessing I'm having a cooling issue?

I think I tore out my new impeller. When I checked to make sure it would start prior to pulling up to the ramp, I acciently started it.

Even still it did not plane the boat initialy. Would it have gotten that warm that fast to effect performance?

 

[bowman316]

Re: Boat dogging

Re: Boat dogging

if there is a good stream of watter comming out of the engine, then it should be cooling ok.

might be a coil issue

 

[Bob_VT]

Re: Boat dogging

Re: Boat dogging

If that is the 1964 40 hp in your signature ......it should have a shear pin and it is impossible to have a spun hub..... broken shear pin yes.

Get a set of muffs and start it on muffs to check for a water stream for the impellar. OR even better drop the lower unit first and change out the impellar if it has not been done.

Do you have the proper shop manual for that motor (not the aftermarket but a true OEM manual)?

 

[Reifwj]

Re: Boat dogging

Re: Boat dogging

I thought those props had an insert. The sheer pin is fine. It worked just fine prior to runing the prop through the mud. After it started back up, once I put some RPMs to the prop, the motor reved, but thrust stopped.

The stream has changed to a mist with some sputter water.

I do not have a manual. Where can I find one?

 

[CATransplant]

Re: Boat dogging

Re: Boat dogging

If that is the 1964 40 hp in your signature ......it should have a shear pin and it is impossible to have a spun hub..... broken shear pin yes.

Get a set of muffs and start it on muffs to check for a water stream for the impellar. OR even better drop the lower unit first and change out the impellar if it has not been done.

Do you have the proper shop manual for that motor (not the aftermarket but a true OEM manual)?

Actually, those props have rubber hubs, too. Yes, they do. I had to come back from the middle of the lake on my trolling motor once due to a spun hub. The prop is driven by the drive pin, but there's still a rubber hub insert.

 

[CATransplant]

Re: Boat dogging

Re: Boat dogging

I thought those props had an insert. The sheer pin is fine. It worked just fine prior to runing the prop through the mud. After it started back up, once I put some RPMs to the prop, the motor reved, but thrust stopped.

The stream has changed to a mist with some sputter water.

I do not have a manual. Where can I find one?

They do have a hub. Just buy another prop. They're everywhere on ebay, and cheap, too. Get a couple so you have a spare, or buy a brand new one right here on iboats.

As for your overheating, pull the lower unit and replace the impeller. Check the thermostat, and make sure all the water passages are clear. Don't ruin your nice outboard by running it hot that way.

Get the cooling right. You should have a good amount of water coming out of the exhaust relieve outlet. Not so much at idle, but a visible and substantial amount at any speed above idle. If not, then it's time to diagnose and fix the bad cooling circulation.

 

[Reifwj]

Re: Boat dogging

Re: Boat dogging

So I should have a steady stream at anything other than idle?

 

[CATransplant]

Re: 1964 seahorse 40 hp dogging

It's not really a steady stream, but there should be plenty of water coming out of that relief hole. If there's not a lot of water coming out, there's something wrong with your cooling system. What that is needs to be diagnosed and repaired. It could be a bad impeller, a collapsed water tube grommet, something clogging up the water tubes, a bad thermostat, or something else.

Don't run your engine until you figure it out and fix it. If you do, you will certainly destroy it. It sounds like you already have overheated it until it seized. Those Big Twins may survive one or two such seizures, but that's it.

Just stop running it until you figure out why it's not cooling. It would be a shame to ruin a good outboard.

I'm sorry to be so blunt, but when an engine dies due to overheating, it's silly to keep trying to run it. It won't fix itself. Fix it or lose it forever. It's up to you.

 

[bowman316]

Re: 1964 seahorse 40 hp dogging

by the water relief hole i guess you mean where it "pisses" out water? or do oyu mean the exuhast down near the waterline?

you should have a steady stream at all times comming from the **** hole. even at idle. and the water should be warm, since it is taking heat away from the engine.
mud and sand will damage an inmpeller.

 

[Reifwj]

Re: 1964 seahorse 40 hp dogging

I guess I'm taking the lower unit off again. No need to appologize, I had no intentions on running it anyplace but the tank until I get this fixed. How do I test the thremostat. I'm guessing if the water is coming out cold, then the thermostat isn't opening. About how long should it take the thermostat to open runing in the tank?

 

[lindy46]

Re: 1964 seahorse 40 hp dogging

Remove the thermostat and suspend it in a pan of water on the stove. Make sure it's not touching the bottom of the pan. With a thermometer in the water, begin heating. T-stat should begin opening at about 140-150 degrees F.

 

[Reifwj]

Re: 1964 seahorse 40 hp dogging

where is it at? I can't find my parts break down.

 

[CATransplant]

Re: 1964 seahorse 40 hp dogging

Top of the engine, under a cover attached with three machine screws.

 

[Reifwj]

Re: 1964 seahorse 40 hp dogging

Thanks for the advice. I pulled the thermostat out and it came out in 4 peices. My experience from autos tells me this is not good.

 

[Willyclay]

Re: 1964 seahorse 40 hp dogging

Just sent you a Private Message.