Power LOSS when trying to get on plane.....

[Turtlelips]

I have a 1985 40 hp Evinrude. I can't seem to figure out what the problem is. When I put the shifter in full throttle the rpms go up for a couple of seconds but then it just dies down, but motor stays running at about 6 mph. I checked my fuel supply for any leaks and replaced all the hoses and clamps. I recently changed the water gasket as well as the thermostat. The thermostat didn't seem to go in the hole very well, could that cause water flow problems? I also recently had my carbs completely cleaned and I also replaced the starter solenoid, fuel pump and fuel filter. If anyone has any suggestions on what the cause may be please help! Thanks in advanced

 

[Turtlelips]

Re: Power LOSS when trying to get on plane.....

I hope someone out there can help. I am a mother who loves to go out and fish and I love to take my 3 year old daughter out with me. She caught her first 5 fluke last Thursday and we have been stuck in since.

 

[G DANE]

Re: Power LOSS when trying to get on plane.....

If you advance throttle, motor picks up and starts with acceleration at normal power, and then looses power, my guess would be some kind of fuel restriction. Try to: <br /><br />1. Check that tank vent is open and free.<br />2. Squese primer bulb firmly when problem appears.<br /> If it helps, filter is dirty, tank vent is blocked or fuel pump bad. <br /><br />3. Try to drain both carb bowls by removing buttom plug screws. Drops of water in carb bowl can restrict fuel flow to high speed jets debris can flow around.<br /><br />4. If above doesnt help, and it is not done recently, disassemble carbs, soak in solvent without plastic parts for 12 Hrs. Blow compressed it thru all orifices and jets, install rebuild kits, and put back on. Reset Synck'n linck timing.

 

[Turtlelips]

Re: Power LOSS when trying to get on plane.....

Thanks for you response G DANE. The vent is opened and I tried the squeezing the bulb trick but it didn't seem to help. I checked all the fuel lines and replaced them. There does not seem to be any fuel leaking anywhere. The fuel pump and filter are also new. When I took the boat out today it would sneeze which it was never doing and then it would cut off. I did have a mechanic clean out my carbs, would you recommend I get a rebuild kit?

 

[DJ]

Re: Power LOSS when trying to get on plane.....

Are you sure the arrow on the fuel bulb is pointed toward the engine?<br /><br />If you bought a double ended fuel hose, you can hook them up backwards. Been there.

 

[G DANE]

Re: Power LOSS when trying to get on plane.....

Sneezing is usually telling you it get too little gas or ignition isnt advanced. Check that the timer base under the flywheel turns when you advance throttle. Maybe a link fell off.

 

[Turtlelips]

Re: Power LOSS when trying to get on plane.....

Well, I just went and checked the fuel lines again and I was taking off the short hoses that connect to the carbs from the fuel pump. When I removed the hose from the bottom carb the other end of the hose that was connected to the little black plastic tree thing that is also connected up to the fuel pump broke off and I didn't even put any pressure on it. Could this be the cause of this whole mess. No stores are opened today so I will purchase another one tomorrow I hope this will fix my problem. I will get back and let you know how it worked out. Thanks

 

[G DANE]

Re: Power LOSS when trying to get on plane.....

If the tee was the problem you would have had lots of gas squirting out there. Did you check if you accidentally turned the fuel line as DJ says, and if the timer base turns freely when you throttle up.

 

[Turtlelips]

Re: Power LOSS when trying to get on plane.....

Ok, Changing the fuel manifold seemed to help a little it stayed on plane for about 20 seconds instead of 5 (sigh). I just changed my ignition coils and I am going to replace my power pack. This is the only thing on the motor that I have not yet replaced. Do you think this will help? I have not taken it out since the new coils have been put on I wanted to replace the power pack first. Does anyone think this is a good idea? Thanks in advance!

 

[Turtlelips]

Re: Power LOSS when trying to get on plane.....

Oh, and yes the fuel filter is on the right way. And I am also unsure what you mean by the timer base turns freely when I throttle up? Please remember I am a female and I have read the Clymer manual but am very confused. I have never done this much mechanical stuff in my whole life.

 

[G DANE]

Re: Power LOSS when trying to get on plane.....

By all means - dont just replace parts blindly, hoping it will help. It might, but it could be the last part you choose as well as the first. read the troubleshooting chapter in your manual first and do some checking. If it aint broke - dont fix it. If it passes the spark test, leave the ignition for a while. It sounds like sort of a fuel delivery problem. Do you have the possibility to try someone elses portable gas tank on the water ??? Concerning timer base, look under sync'n linck under tune up.

 

[G DANE]

Re: Power LOSS when trying to get on plane.....

BTW male or female, i dont see the difference here, I was where you stand with my first outboard.

 

[Turtlelips]

Re: Power LOSS when trying to get on plane.....

I didn't replace the power pack yet. When I went out it was running good then it started to bog down again. Ok now question, When I would push in the ignition it would go for a second and then bog down is this normal? I am thinking that it is starving for fuel somehow but not sure what else to check.

 

[voodoo]

Re: Power LOSS when trying to get on plane.....

that chokes the motor, have you looked at the primer assy?

 

[Turtlelips]

Re: Power LOSS when trying to get on plane.....

I looked at the primer solenoid while I was referring to the manual. It is saying there is suppose to be a black ground lead and a purple and white lead. I have the purple and white lead but not the black? I also misplaced the little cover that is suppose to go on the valve.

 

[Turtlelips]

Re: Power LOSS when trying to get on plane.....

Nevermind that last message I went down and checked again. There is a black lead. I had it on the top and the manual states that is should be under the lower clamp screw. So I changed it The purple and white lead is neither on the top or the bottom (nor is it big enough to fit) it is on the little screw in the middle of the solenoid where there is another lead that seems to be comming from the power pack is this correct? It didn't tell me in the manual

 

[G DANE]

Re: Power LOSS when trying to get on plane.....

If bumping choke helps for a second or two, the reason it bogs down has to be lack of fuel. You have to clean both carbs. <br />Pull them, dissassemble, remove all gaskets, floater and other plastic parts. Soak for at least 12 hrs fully submergen in carb cleaning solvent, can be bought at autostores. Afterwards, blow thru all passages with compressed air. Wear glasses. Pay special attention to the small orifices in carb body, inside throat just above butterfly, very important. Remove high speed jets from floater chamber ( behind drain screws ) and check they are totally clean. Put carbs back together and on again. Pay attention to syncronisation of carbs together. Do the sync'n linck procedure described in manual. I feel sure thats your problem.

 

[Turtlelips]

Re: Power LOSS when trying to get on plane.....

I had the carbs cleaned by my mechanic. I have read the sync n link section of the manual and I am now totally confused. I am about ready to put a hole in the boat and push it away from the dock. I played around with it today and now it is just cranking and won't turn over. I didn't make any changes to anything. The only thing I can think of is that the $240.00 VRO pump I purchased is a piece of junk. I bought it from the Johnson/Evinrude dealer where I have bought all my parts. If there is anyone out there that is near me I would be willing to pay for someone to come take a look. I am in Island Park New York.

 

[G DANE]

Re: Power LOSS when trying to get on plane.....

Try to put some premixed gas/out in a spraybottle. remove air silencer cover, Spary the mixture in both carb throats while you let some one cranck it. If it starts to fire you will know it IS fuel related.

 

[Freezebear]

Re: Power LOSS when trying to get on plane.....

I have had twice in one year the exact problem you describe and both times it has been the squeeze bulb bad. Mine starts as running along just fine and then starts losing power in spurts, then will just die down to a real slow speed with the throttle wide open. I can get it to recover and get me back home by pulling the fuel line out so I can get to the bulb and squeezing it while it does it. I don't know what happens to them, but I know I have replaced two of them in the last year on my boat. You can sometimes tell by squeezing it and seeing if it gets progressively harder. If it doesn't pump up, replace it. And like DJ said, don't forget to check the arrow when reinstalling it or it will do the same thing.