jtexas
Fleet Admiral
- Joined
- Oct 13, 2003
- Messages
- 8,646
Re: 70 hp cutting out problem
hmmm.... the "EE" in your model number E70PLEEA translates into 1999, and the first E means "Evinrude" (to distinguish it from Johnson). The 1999 rude 70's were fuel injection; your picture looks similar to the Johnson carbs from that year, but a different part number. I can't find your part numbers. I don't know about any '03-'04 carbed 3-cylinders. Before '99 or so, Johnson & Evinrude models were mirrors of each other, interchangeable part for part.
The 3-cylinder carbed johnnyrudes came with different carbs over the years; some have adjustable slow speed jets, others are fixed. Some have 3 jets, others have two.
"All three valves are connected by a bar, so if one sticks would it hold the other two open with it." Yes, should have known...but somehow I had in mind that one of yours was out of sync.
If the motor's running without a load (in neutral and especially on the muffs) and all three throttle valves are open, it'll race, RPMs would be sky high; so that's not happening.
Sounds like your mechanic adjusted the "pick-up timing". when you push the throttle control forward, after it shifts into gear, the spark timing has to advance before the carb throttles start to open; if the carbs open too soon, the motor will just die on you. He might have called it an "idle adjustment" cause it's easier than trying to explain syncronization to a customer. Sounds like he was headed in the right direction, but he should have put it in the test tank with a test wheel and made sure it would run right before turning it back over to you.
You get the same result if the idle speed is set too low. But either way, you're more likely to be able to nurse it up to speed by feathering the throttle, instead of putting the hammer down quickly. That's been my experience.
hmmm.... the "EE" in your model number E70PLEEA translates into 1999, and the first E means "Evinrude" (to distinguish it from Johnson). The 1999 rude 70's were fuel injection; your picture looks similar to the Johnson carbs from that year, but a different part number. I can't find your part numbers. I don't know about any '03-'04 carbed 3-cylinders. Before '99 or so, Johnson & Evinrude models were mirrors of each other, interchangeable part for part.
The 3-cylinder carbed johnnyrudes came with different carbs over the years; some have adjustable slow speed jets, others are fixed. Some have 3 jets, others have two.
"All three valves are connected by a bar, so if one sticks would it hold the other two open with it." Yes, should have known...but somehow I had in mind that one of yours was out of sync.
If the motor's running without a load (in neutral and especially on the muffs) and all three throttle valves are open, it'll race, RPMs would be sky high; so that's not happening.
Sounds like your mechanic adjusted the "pick-up timing". when you push the throttle control forward, after it shifts into gear, the spark timing has to advance before the carb throttles start to open; if the carbs open too soon, the motor will just die on you. He might have called it an "idle adjustment" cause it's easier than trying to explain syncronization to a customer. Sounds like he was headed in the right direction, but he should have put it in the test tank with a test wheel and made sure it would run right before turning it back over to you.
You get the same result if the idle speed is set too low. But either way, you're more likely to be able to nurse it up to speed by feathering the throttle, instead of putting the hammer down quickly. That's been my experience.