63 Starflight V Evinrude

[Calhere]

My Engine overheats if I leave the door shut when the engine is running. Does Anyone have an idea of what the problem may be and possible fixes for it,

Also there is a warning light for the engine in my dash yet it is not hooked up to the wiring harness does anyone know where I can find information on how to hook it up? And is it possible to upgrade that light to something more up to date instead of a huge red bulb.

 

[F_R]

Re: 63 Starflight V Evinrude

I thought I'd heard it all, but have never heard of one overheating because the door is shut. Plenty of complaints of not running worth a hoot with the door shut though. That generally is due to the seal being missing off the top of the water pump housing. That makes the motor breathe it's own exhaust smoke.

A "hot" wire goes from the ignition switch "I" or "A" terminal to the bulb socket. The bulb socket shell connects to a tan wire going to the thermal switch in one of the cylinder heads. When overheated, the thermal switch completes the ground for the bulb and it lights.

You can update it to a horn in place of the bulb socket if you wish. That's what they did with newer models. Just get a horn from one of those.

 

[Chris1956]

Re: 63 Starflight V Evinrude

You might remove your thermostat and test it. Put it in a pan or water on the stove. When the temp reaches 140* it should open

 

[tashasdaddy]

Re: 63 Starflight V Evinrude

i agree the door would have nothing to do with it. impeller, tstat, blown head or exhaust gasket.

 

[Calhere]

Re: 63 Starflight V Evinrude

So say its anyone of those problems how much should it cost to just rebuild the whole thing there fore solving any problems it may have. And how difficult would it be to rebuild it, Im not an engine expert but Ive helped rebuild engines before on several different things an old John Deere and an old Camero but never an outboard.

 

[Evinrude Boater]

Re: 63 Starflight V Evinrude

If you think it's overheating you can take the intake bypass covers off and turn the engine over by hand and look at the side of the pistons as they move by the intake ports. Now this only allows you to look at one side of the pistons. You would have to take the exhaust cover off to see the other side. If the pistons are scuffed then you might want to remove the heads to look at the cylinder walls. Attached are photos of what I found in my Speedifour this fall. I can't say for sure why it overheated but I'm replacing the engine block with another used short block.
These are very simple to work on and the majority of the parts are still available but I priced pistons and rings, gaskets and assorted tools that I would need to rebuild it and I figured it would come to about $1000 excluding my labor. Now you might not need pistons but one of mine has a chunk missing between the rings to I calculated the worst case scenario. To me $1000 would go a long way towards a newer engine.
Good luck and let us know how you make out.

 

[Calhere]

Re: 63 Starflight V Evinrude

If you think it's overheating you can take the intake bypass covers off and turn the engine over by hand and look at the side of the pistons as they move by the intake ports. Now this only allows you to look at one side of the pistons. You would have to take the exhaust cover off to see the other side. If the pistons are scuffed then you might want to remove the heads to look at the cylinder walls. Attached are photos of what I found in my Speedifour this fall. I can't say for sure why it overheated but I'm replacing the engine block with another used short block.
These are very simple to work on and the majority of the parts are still available but I priced pistons and rings, gaskets and assorted tools that I would need to rebuild it and I figured it would come to about $1000 excluding my labor. Now you might not need pistons but one of mine has a chunk missing between the rings to I calculated the worst case scenario. To me $1000 would go a long way towards a newer engine.
Good luck and let us know how you make out.

I want to keep the classic look and well its right at 1000 (938.93) to do a complete rebuild on the engine I currently have. So that is the route im planning on taking. Its still a good engine just needs some care it is about 45 years old and the guy that had it before me (the only owner never even changed the spark plugs

 

[Joe Reeves]

Re: 63 Starflight V Evinrude

Certainly no reason to rebuild the engine for that problem.

The clue is that the engine runs properly with the front access door open. This has nothing to do with overheating but rather with the engine breathing its own exhaust. The open door allows fresh air to access the carburetor throats.

The problem on that model is that the large soft rubber seal is either faulty or missing. It exists about halfway down the long exhaust housing, between the outer casing and the actual exhaust housing. This allows the raw exhaust gases to travel up to the powerhead area, carburetor, etc.

Remove all of the philip screws that attach the long rear casing to observe the seal I speak of.

 

[F_R]

Re: 63 Starflight V Evinrude

The seal that Joe speaks of can be the cause of the problem. But I stand behind my earlier statement that it usually is the seal missing off the top of the water pump. Either way, it is a heck of a lot easier to check the pump seal than to replace the rubber seal between the midsection housings.

Perhaps an explanation is in order: The drive shaft runs in a tube, isolating it from the exhaust. The water pump is sealed to the bottom end of the drive shaft tube. The upper end of the drive shaft tube is vented, the vent being under the motor covers. IF the seal is missing off the water pump (or parts missing from a long shaft conversion kit), then exhaust blows into the drive shaft tube and out of the vent at the upper end. Then the exhaust gasses are sucked into the carburetor, causing lousy performance. Opening the door allows it to suck clean air and it runs better.

The part number of the seal that I'm talking about is 305762 and it is made from a foam rubber kinda stuff.

Make sure that seal is there and that all the long shaft parts are in place, and I'll bet it will fix the problem.

 

[Calhere]

Re: 63 Starflight V Evinrude

Certainly no reason to rebuild the engine for that problem.

The clue is that the engine runs properly with the front access door closed. This has nothing to do with overheating but rather with the engine breathing its own exhaust. The open door allows fresh air to access the carburetor throats.

The problem on that model is that the large soft rubber seal is either faulty or missing. It exists about halfway down the long exhaust housing, between the outer casing and the actual exhaust housing. This allows the raw exhaust gases to travel up to the powerhead area, carburetor, etc.

Remove all of the philip screws that attach the long rear casing to observe the seal I speak of.

Understood however that still does not address my issue that the motor can be at almost full throttle and feel like it is barely moving. what could be the cause of this?

 

[HighTrim]

Re: 63 Starflight V Evinrude

Understood however that still does not address my issue that the motor can be at almost full throttle and feel like it is barely moving. what could be the cause of this?

Im getting kinda confused, as your problem seems to be changing.

I would follow Franks and Joe's advice, you couldnt find a better pair to help you with that motor. They have seen it all. If opening the hatch picks her back up, she is breathing exhaust, follow their reccomendations.

Now though you describe being at full throttle, yet having low speed? Are the RPMs up, yet speed down? Check the hub for being spun.

In general, I would compression test her, then check spark on all cylinders. That is always a good starting point for any troubleshooting situation.

Good luck.

 

[Joe Reeves]

Re: 63 Starflight V Evinrude

My initial reply (error due to age, sick wife, I feel lousy) stated that "the engine runs properly with the front access door closed" was obviously in error. Should have been "the engine runs properly with the front access door open." I edited and corrected that original reply. My apologies if that caused any confusion.

 

[Calhere]

Re: 63 Starflight V Evinrude

Understood however that still does not address my issue that the motor can be at almost full throttle and feel like it is barely moving. what could be the cause of this?

My Mistake I thought I had put this in my original post as that was my intentions when I posted it.

 

[F_R]

Re: 63 Starflight V Evinrude

So, now we go back to the basic question: Does the engine run at high speed, but not push the boat (like it is slipping), or does it not run at high speed, just sluggish and bogged down?

If slipping, it probably has a spun propeller hub. If sluggish, could be a number of things such as not running on all four cylinders. Or smoke inhallation....back to the closed door thing.