64' Evinrude 40-hp issues

[64vintageray]

I just bought an old boat with a 64' Evinrude 40hp engine on it. I put it in the water and it does not seam to be achieving full power in the water. When hooked up to the house in the driveway everything seams fine but under a load it is not running right. I can't get the boat to get on plane. It feels like as soon as I gas it up is feels like it is missing or something. The spark plug wires seamed to fit loose so there was another set in the boat that fit better but were a little black. The boat has a new head on it as well.

What do you think the problem might be.

 

[Willyclay]

Re: 64' Evinrude 40-hp issues

Welcome to the iboats.com forum. The experts here can help you solve any problem with your boat, motor or trailer. While I am not an expert, I do have some service information for that model motor scanned and saved. If you are interested in a free copy, send me a Private Message with your email address and I will reply with the info attached. FYI, they all run great on the hose in the driveway. As you found out, the real test is in the water, under load. Hopefully, one of the forum gurus will post something soon. Meanwhile, you might look at the FAQ's and Top Secret File by Tashasdaddy for some good direction on trouble-shooting. Good luck with that great old motor!

 

[Daviet]

Re: 64' Evinrude 40-hp issues

You need to start with some basic checks, compression, spark and fuel delivery. Those engines will run great on one cylinder, you might try pulling one spark plug at a time and see if you have a dead cylinder.

How are you running the engine on a hose, what type of flush attachment are you using? I don't think they make a flush attachment anymore for that engine.

 

[F_R]

Re: 64' Evinrude 40-hp issues

How are you running the engine on a hose, what type of flush attachment are you using? I don't think they make a flush attachment anymore for that engine.

That caught my attention too. Do you have an old Flushette? They are pretty rare.

 

[64vintageray]

Re: 64' Evinrude 40-hp issues

I am a first time boat owner so I took the advice of a person from work and got the standard flush cup assembly from West Marine. I found the intake screen on the side of the lower unit and hook it up. I made sure that water was coming back out of the port above the prop as well. Is this a bad idea? Am I taking the wrong steps?

 

[asdasc]

Re: 64' Evinrude 40-hp issues

OK, I was curious and had to look it up!

Tempo Testit Flushette

 

[F_R]

Re: 64' Evinrude 40-hp issues

I am a first time boat owner so I took the advice of a person from work and got the standard flush cup assembly from West Marine. I found the intake screen on the side of the lower unit and hook it up. I made sure that water was coming back out of the port above the prop as well. Is this a bad idea? Am I taking the wrong steps?

The main water intake is the screen on the leading edge of the exhaust outlet above the prop. The holes on the side of the lower unit are there to let water in when running in reverse and the prop is sucking water away from the main intake. Using muffs on the side inlet only squirt water out the main inlet, and cannot be relied on to furnish adequate cooling to the powerhead.

In other words, yes it is a bad idea and you are likely to overheat the motor. The proper flush attachment for it is called a Tempo Flushette, which hasn't been made for many years. The Flushette clips over the main water intake. The other option is to put it in a tank deep enough to submerge the first bulge above the flat plate.

 

[Willyclay]

Re: 64' Evinrude 40-hp issues

When my Flushette finally wore-out after many years of use, I looked for another way to use a hose on these types of motors. Found an extra Water By-Pass Cover (the oblong screw-on plate just above the anti-ventilation plate) and drilled/tapped it for a water hose fitting. It was not quite as convenient as the Flushette because of the two screws but it would not slip off while the motor was running either. To help ensure most of the water stayed in the cooling system, I would bungee a piece of rubber over the water inlet behind the exhaust outlet. Worked okay for me.