TD has one driving him to drink

[HybridMX6]

Re: TD has one driving him to drink

Worst case you can rule them out if it doesn't work, LoL, or if it does then you know something is up with the ones on the motor.

 

[F_R]

Re: TD has one driving him to drink

Check to see if somebody has changed the jets in the carbs? Y'know, some people think you can get more power that way. Not.

 

[cdoliver]

Re: TD has one driving him to drink

I'm sure you have tried pumping the bulb to make sure the bowls are full of fuel when it dies? You said it idles and runs for a bit, maybe running out of gas in the bowls?

 

[tashasdaddy]

Re: TD has one driving him to drink

Ok, here are the latest results, good working fuel pump, all new lines not leaks. installed another set of carbs, that i know are good.

it is spitting out the throat, i'm thinking reeds or as Faztbullet said skirts, but i did the old finger test over the pulse hole, and turned the flywheel by hand and got good pulses.

the compression on my guage was 150 and 148, so it has great compression. new plugs gapped .030.

 

[Tim Frank]

Re: TD has one driving him to drink

Did you try a vacuum gauge for fuel pressure and crankcase sealing?

 

[tashasdaddy]

Re: TD has one driving him to drink

no. will do.

 

[tashasdaddy]

Re: TD has one driving him to drink

every dang thing is good, reeds are closing, not stuck. i'm at a loss.

 

[bullbat]

Re: TD has one driving him to drink

are you sure that ur not sucking air around the fuel lines somewhere, had a 25 johnyrude that done that and bout drove us stupid, and it did drive us to drinkin and throwin stuff b4 we found it

 

[tashasdaddy]

Re: TD has one driving him to drink

yes, new lines pressure tested.

 

[reeldutch]

Re: TD has one driving him to drink

if everything is good i would suspect a crankcase leak.

could be external (mating surface leaking)
could be internal.
between the 2 crancases.

hard to say

but as you stated you have good compresion ,fuel and spark.

the only thing you dont know for sure is crankcase compresion.

but i would defenatly double check everything else out before making this conclusion.

spraying some carbcleaner around the case half with the engine running, might help you find a leak.

 

[Lone Duck]

Re: TD has one driving him to drink

if everything is good i would suspect a crankcase leak.

could be external (mating surface leaking)
could be internal.
between the 2 crancases.

hard to say

but as you stated you have good compresion ,fuel and spark.

the only thing you dont know for sure is crankcase compresion.

but i would defenatly double check everything else out before making this conclusion.

spraying some carbcleaner around the case half with the engine running, might help you find a leak.

Crank seal? When it does start, does it idle to fast? Causing a lean condition?

 

[tashasdaddy]

Re: TD has one driving him to drink

it idles too fast if you prime it first, then just switch it off, restart it idles normally then dies, it will not respond to fuel when it starts to die.

 

[rabeck5792]

Re: TD has one driving him to drink

had a mercury 50 hp do some what the same thing,found exhaust plugged.

 

[clanton]

Re: TD has one driving him to drink

Check the prop shaft bearing housing, if the housing is installed upside down it will block the exhaust on some of these engines. These engines had a very high failure rate of the drive shaft and gearcase, so it probley has gear case work.

 

[bob johnson]

Re: TD has one driving him to drink

Check the prop shaft bearing housing, if the housing is installed upside down it will block the exhaust on some of these engines. These engines had a very high failure rate of the drive shaft and gearcase, so it probley has gear case work.

aint that the truth , I have a 2001 and I have put four onto my 50 johnson....first one was under warranty....the next two were repairs to the lower unit...the last was a whole new case!!!( tip...dont cruise through 1" of ice thinking , because you are going so fast all is well!! ha ha)

bob

 

[Silvertip]

Re: TD has one driving him to drink

If the plugs get wet, a leaky (internal) primer solenoid can be the culprit. Likelwise, a piece of debris in that system can also cause issues. Disconnect the small primer solenoid line at the carb, one at a time and squeeze the primer bulb. If the lever is set properly there should be no flow or dribble out these lines. If there is you discovered the over rich condition. When the engine runs it simply sucks fuel through the solenoid and into the carbs. Now turn the key to RUN and push the key in. This should squirt fuel. If not, you have a plugged primer solenoid but that condition would create a cold start issue and has no bearing on your problem. That's my shot in the dark.

 

[Lone Duck]

Re: TD has one driving him to drink

OK! I reread all the posts. This is what we have. VRO bypass (good) Fuelpump (good) primer (good) Carbs (good) Reeds (good) Lines and fittings (good) Silvertips check (good) SOOOO! Something is erratic in the timing. Hot coil? Loose linkage? Magnets not tight? Wire sometimes rubs on flywheel? Advance system loose. I ain't going to sleep tonight. Time for a drink.

 

[Lone Duck]

Re: TD has one driving him to drink

Kill switch? Ignition switch? Kill switch wire? disconnect ignition switch and ignition wire & killswitch wire at the motor. connect your own kill wire jump to selinoid and fire it up. Oh sh-t I've had to much to drink.

 

[JB]

Re: TD has one driving him to drink

Test the fuel pump, TD. Sounds like it isn't pumping enough fuel.

Could be failure to get strong enough pulses from the crankcase, air leak, etc.

Don't replace it, TD. TEST it. There are several things that can cause the fuel pump to not pump enough fuel that are not part of the pump. You still don't know if the pump is working right, and if not why not.

Possible causes are leaky reeds, leaky bypass cover gasket, leaky reed manifold gasket, blown crank seal (all above in the cylinder that "pumps" the fuel pump), air leak in fuel supply lines, restricted fuel supply.

Whatever is wrong is common to both cylinders, both carbs. Not very likely that the same thing goes wrong with both carbs at once, now is it?

Replacing/overhauling parts is the most used, most expensive and least effective troubleshooting method known to man.

 

[bob johnson]

Re: TD has one driving him to drink

Kill switch? Ignition switch? Kill switch wire? disconnect ignition switch and ignition wire & killswitch wire at the motor. connect your own kill wire jump to selinoid and fire it up. Oh sh-t I've had to much to drink.

27 minutes!!!!!!!!!!! and youve had toooo much to drink already???

what are you 110lbs?

you drinking liquid sterno???

but thats none of my business...rigth? ha ha ha


my mechanic would have solved that 50 hps problem two days ago

"its junk, buy a new one"

ha ha

bob