!979 evinrude 140hp seems like it was running out of gas, but wasn't ??

Hi
My 1979 evinrude 140hp is giving me some troubles. I've had this boat for about 2 years, and when it was running well, it is a great engine. We where out tubing one day, and pulled into shore for 30 mins or so. We went to head back out for some more boating, and shortly into our tour out again, I began to slowly give full throttle. It was running like a dream, it seemed as though it was going faster than I had ever felt it go before. All of a sudden, the motor just bogged fast, just like when it runs out of gas when your going along at a good clip. Only once I shut it off, and checked the gas, it was half full still. I tried to start the motor, but it wouldn't. so i waited a few short mins, and tried again. It fired up, and ran bumpy for a few secs at idle, then smoothed right out. I started to give it a little throttle to get going again. It started to go, then all of a sudden before it even really got going, it bogged out again. this time I let it idle. It idled very rough then died. Again i waited and tried it again, it ran good for a short short time, then bogged. After changing coil packs, plug wires, plugs, and then taking it into a boat mechanic that turned out beiing a crack head, I'm sitting here this year wondering where to go from here. Can anyone help, or have any similar experiences. My thanks in advance.

Bob.

Re: !979 evinrude 140hp seems like it was running out of gas, but wasn't ??

If you think the fuel pump is weak, have a friend constantly prime the fuel hose bulb while running the boat in the water. This will force extra fuel into the carbs. If the engine runs fine while you constantly prime the bulb, the pump may be weak, or you may have a fuel restriction, or a bad fuel hose. If you have an anti-siphon valve on a built-in tank, make sure the ball valve moves freely and has no debris in it. If you don't see any apparrent fuel issues, you may be losing spark on one or more cyls. That engine has dual power packs which can be swapped for testing purposes.

Re: !979 evinrude 140hp seems like it was running out of gas, but wasn't ??

Agree, first thing check the fuel delivery.

Re: !979 evinrude 140hp seems like it was running out of gas, but wasn't ??

Thank you for the reply, I tried the pu,ping of the bulb trick, and no difference at all. Also, all I have is the 20 litre cans for tanks. Any other ideas? Thanks again.

Re: !979 evinrude 140hp seems like it was running out of gas, but wasn't ??

it could be clogged vent in tank, fuel line/connection sucking air, bad fuel pump, clogged carb(s). you also should check engine compression and do a spark test with a spark gap tester set at 7/16

Re: !979 evinrude 140hp seems like it was running out of gas, but wasn't ??

I did a compression check on it shortly after the problem started, and all was good there, but I will have to hunt down one of those spark testers, and try that. If it comes up with week spark, would that have to do with the power packs? I changed the coil packs thinking it would be them, but no change there. Also I have been hearing a little about the Stator. Could the Stator be the cause of symptoms that I'm having? .. I'm fairly mechanically inclined with vehicles, but man oh man, this boat has me frazzled, lol. anymore help is greatly appreciated.

Re: !979 evinrude 140hp seems like it was running out of gas, but wasn't ??

Weak ignition components tend to fail when the engine reaches normal operating temps. Runs fine when cold, then craps out when warmed up. That could be your problem. The coils have a fairly low failure rate and it's unlikely that all 4 quit at the same time. That leaves the stator, both power packs and the timer base. They are all expensive and any can cause you problems. Some testing of these components is worthwhile, considering their cost. You can find excellent troubleshooting information in the original factory service manual (outboardbooks.com) or from the online source CDI.

Re: !979 evinrude 140hp seems like it was running out of gas, but wasn't ??

get a dva adapter and go here for a free trouble shooting guide.
http://issuu.com/cdielectronics/doc...t.xml&backgroundColor=000000&showFlipBtn=true

Re: !979 evinrude 140hp seems like it was running out of gas, but wasn't ??

Pull spark plugs out, & stick back into
Boots & lay on the block to check for
Spark
Make sure there is gas on carb bowls
Look for water in gas in float bowls
Check kill cord cap if equipped

Re: !979 evinrude 140hp seems like it was running out of gas, but wasn't ??

These spark plugs in this thing don't have the little curved piece of metal on the end of the plug. It's just flat on the end with a little bump in the middle. no curved piece for spark to jump to. I've never seen these type before, until this motor in my boat. Is there something special with these? Thanks again.

Re: !979 evinrude 140hp seems like it was running out of gas, but wasn't ??

That year the factory put the tipless UL77V Champion plugs in all the 140's. That 140 was considered a high performance engine so it was shipped with a sustained high rpm plug. That year's 85, 100 and 115 used the tipped L77JC4 plugs.

Re: !979 evinrude 140hp seems like it was running out of gas, but wasn't ??

Did we clean and rebuild the carb's yet ????

Re: !979 evinrude 140hp seems like it was running out of gas, but wasn't ??

With the flywheel, does it just come off without to much trouble? or is it a puller type situation? And also, is this where I would get a good look at the stator? I have found a couple topics on the stator and regulators and such. just wanting to have a look at the stator, but havn't had a boat motor apart before.. many car engines, but this is a little different. lol.. thanks again.

Re: !979 evinrude 140hp seems like it was running out of gas, but wasn't ??

Bobvernon said:

With the flywheel, does it just come off without to much trouble? or is it a puller type situation? And also, is this where I would get a good look at the stator? I have found a couple topics on the stator and regulators and such. just wanting to have a look at the stator, but havn't had a boat motor apart before.. many car engines, but this is a little different. lol.. thanks again.

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Repeat of post #12,
Did we clean and rebuild the carb's yet ????

Re: !979 evinrude 140hp seems like it was running out of gas, but wasn't ??

That would be a no, lol .. It just doesn't seem to me, to be fuel related. I know that's hard to just say, but I've been doing so much research on these symptoms, that everywhere I look, it points to ignition. One other thing that I was thinking about also, was after reading a trouble shooting read, it mentioned resistors. after reading what it said about charging systems having to do with that area of things, this motor, ahs never kept my battery charged. I even bought a brand new good quality battery, and it will just eventually die if i dont put it on the charger at home. Long story short, it made me start thinking the stator, as this problem, even though in the very end it bogged fast, it only got worse in little time. Seems maybe the stator or something in that department was gradually going, and finally decided to quit all together. though i can still start the motor, but hardly runs, and if in water, trying to go, it just bogs and crapps then dies.. have i got you really confused now? lol

Re: !979 evinrude 140hp seems like it was running out of gas, but wasn't ??

Battery discharging is not usually a symptom related to bogging or the running issues you describe in the first post. The stator is divided on that engine. Part of the stator is designed to recharge the battery. The other part of the stator is designed to run the ignition system. The stator has separate coils for both systems. Once you loosen the flywheel nut, you will likely need a 3-legged automotive type puller screwed into those three holes in order to pop the flywheel loose from the taper on the top of the crank. When you get the flywheel off, double check the condition of the key.

Re: !979 evinrude 140hp seems like it was running out of gas, but wasn't ??

So when pulling the flywheel off, I'm assuming it only goes on one way, and nothing comes springing out at you? lol .. Thanks again for the info. Learning anything new about this motor is appreciated greatly.. I'd love to get it going again soon. The kids are missing it. Well, so am I, lol.. So if the stator was to quit, would it cause the symptoms I've described? or should i say could it,,

Re: !979 evinrude 140hp seems like it was running out of gas, but wasn't ??

Clean the carbs and use fresh gas. Cheap and simple. If you don't know when the carbs were last serviced then it is overdue anyway. If the fuel can not get through then it will bog down.
Just my 2 cents though.

Re: !979 evinrude 140hp seems like it was running out of gas, but wasn't ??

They are pretty basic are they not? I'd imagine I just goto evinrude here in vernon, and pickup a rebuild kit? I'm so new to this boat thing, lol.. had it for soon to be 2 years, but have been battling silly problems the whole way through.. Hey also, is there a big reason on why to use premium gas apposed to regular unleaded? and with gas mix oil, is it important to use evinrude brand or acan a guy use castrol? .. some of the other little things I can't get a straight answeer out of anyone at a shop arouynd here.

Re: !979 evinrude 140hp seems like it was running out of gas, but wasn't ??

Bobvernon said:

They are pretty basic are they not? I'd imagine I just goto evinrude here in vernon, and pickup a rebuild kit? I'm so new to this boat thing, lol.. had it for soon to be 2 years, but have been battling silly problems the whole way through.. Hey also, is there a big reason on why to use premium gas apposed to regular unleaded? and with gas mix oil, is it important to use evinrude brand or acan a guy use castrol? .. some of the other little things I can't get a straight answeer out of anyone at a shop arouynd here.

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Carb rebuild is pretty easy. You will need a rebuild kit for each carb. Check the "Top Secret Files" out for information on it. I would also suggest getting an OEM manual for the motor. Any TCW-3 2 stroke oil will work just fine for your motor. As far as I know regular gas is all you need. That's all I have ever used in any of my outboards.