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2000 evinrude 99 4stroke running problem help please

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booboochipp

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"help anyone. 2000 erude 4 str

"help anyone. 2000 erude 4 stroke. fuel pump diaphram cut so we replaced fuel pump and rebuilt carb.idles perfect, but when you rev it up it goes so far and dies.leaked a bunch of fuel in crankcase before replacing pump, could it have hurt anything? also dad told me minutes ago fuel was possibly a year old. i reckon that could be the problem. but if not where to turn? help anyone. thanks"
 
"The fuel is oxidising from th

"The fuel is oxidising from the day you fill the fuel tank so if there was no fuel stabiliser the fuel would be stall.

The carby has three stages and idle, intermidiate and a high speed...if you still have a blockage in the high speed the engine will idle and rev to a given point then die."
 
"i don't think there is a

"i don't think there is a blockage in the carb. i took it apart and it was like it just come off the shelf brand new.how do you tell if its running out if fuel? idles perfect rev it up and it tries to just fall on its face, and a few popping backfires. but if you feather it you can get it to rev high, but when you let off quickly she dies.if the gas is stall will it have enough octane to idle but not produce rpms?i am going to get that changed asap."
 
i changed the fuel and it didn

i changed the fuel and it didn't matter. if i cup the front of the air intake bolted on the front of the carb it revs up pretty good. not blocking off the air completely but restricting it. whats the deal with that? anyone?
 
"This carb does not have an ac

"This carb does not have an acc pump, it depends on the vacuum in the venturie system to 'suck' up the fuel from the main jet in the float bowl.
What it does have is an intermediate circuit to assist between idle and full, and I might guess this circuit is not working properly.
Take off the top cover of the carb. At the end of the grove it should be two small holes going down behind the butterfly valve. Use a carb cleaner spray and check that these holes are not clogged. Then check that the gaskets has slots cut out for the groves, and not the 'old' type full gasket. If these slots are missing in the gasket, it may be sucked down and blocking the grove and fuel passage.
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nothing wrong with carb. or fu

nothing wrong with carb. or fuel pump. anyone know how to set timing and how to check ? think the belt may have jumped a tooth. maybe? any other suggestions?
 
"Does it pick up if priming &#

"Does it pick up if priming (electric) or choking (manual)?
If You want to check the cam shaft timing, You have to remove the fly wheel and align the 'jack' on the belt wheel with the 'jack' on the cam wheel. You might get a rough indication by using a screw-driver through the plug hole and search the TDC, then check that the notch on the timing wheel is pointing straight forward, but not quite accurate."
 
"if you pull the choke out a l

"if you pull the choke out a little it seams easier to rev up. i don't quite understand your question does it pick up if priming. the cam gear has a mark on the gear and a mark to align it with. i haven't taken off the fly wheel yet but what does it align with?there is a white line below the flywheel that turns with the flywheel that looks like it could be a timing reference.does it turn to align with the cam marks , or are there more marks under the fly somewhere? and if you turn the flywheel it turns 2times to every one revolution of the cam gear. so when the cam gear comes to align with its mark which cyl is at tdc? or should i just pulll a plug and check?"
 
"'if you pull the choke ou

"'if you pull the choke out a little it seams easier to rev up.' - indicates You have a manual (not electric start) engine. The el-start engines does not have a choke butterfly, but a primer solenoid (Fuel-pump) that squirts fuel into the intake.
On below pick You have the two belt wheels #32 and #53 which are the 'official' references. You may however use the flywheel marking TDC if You have it. Just note that on this engine, contrary to a 2 stroke, BOTH pistons are at TDC at the same time! (take a close look at the crank), but only one in the firing stroke, which should be no1 (top), and then the mark on #32 should point towards the crank shaft."
 
"yes it does have a choke butt

"yes it does have a choke butterfly, and it can be reved easier when slightly pulled out.no32 sprocket has a mark on it and right on the head a reference mark cast in it( can't tell in the pic).so align them 2 up.then no53 has a white line in it what do i align it with? is there a reference under the flywheel somewhere? or is it supposed to face the 32 sprocket?"
 
and your saying that the top c

and your saying that the top cyl is no1 and it fires when the 32 sprocket is in align with its mark facing the crank?
 
"'or is it supposed to fac

"'or is it supposed to face the 32 sprocket?' - Yes

'and your saying that the top cyl is no1 and it fires when the 32 sprocket is in align with its mark facing the crank?'- Should be, but You may have it confirmed if You have a timing light."
 
ok i'll give it a shot. th

ok i'll give it a shot. thanks a million i'll do more checking and see what i come up with.i did though have the cam sprocket in line with its mark last night and the crank sprocket was not in line with it so if your theory is true my timing belt slipped by a few teeth. i'll be able to check it next week and see whats up. thanks
 
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