1994 Evinrude 175hp Fires up and dies

[ScreaminToon]

Hows it going... ive used this alot in the past just reading other peoples problems and solutions but no luck this time....
So hopefully someone has seen this before...
I have a 1994 evinrude 175 I bought it off a guy i knew it always ran great for him never a problem..
Well i put it on my boat. and instead of running the VRO i removed it and blocked off the oil lines and mix my gas 50:1.
i do not know if this has anything to do with the problem but...
i have had the boat out about 10 times now ran great. I took it out fishing Fired right up ran about 8 miles back at the lake fished overnight... morning fired up on way back it acted as if it ran out of gas at sputtering to a hault.

so i messed with it on the water for about 4 hours and by moving the little red shrader switch on the carbs. i could get it to fire up and id rev it up once and it would die... over and over and over again....

 

[HybridMX6]

Re: 1994 Evinrude 175hp Fires up and dies

The red valve is part of the primer solenoid. Not totally sure what the problem is, are you getting spark? If you are, then the only other part missing is fuel. Check the fuel lines, tank, tank valve, whatever you can and make sure they are all still connected (I'm saying this since you just recently did the VRO removal), and if all is good, suspect the carbs have got something in them.
That's just my guess, I am sure others will come along with more knowledge than myself, but it may get you going for now at least.

 

[ScreaminToon]

Re: 1994 Evinrude 175hp Fires up and dies

It Must have spark scince it fires up...im suspectin.. can going from oil injected its whole life to 50:1 all the time mess with the carbs?

 

[HybridMX6]

Re: 1994 Evinrude 175hp Fires up and dies

Just because it fires up for a moment doesn't mean it's not dropping spark afterwards. Ij ust want to make sure we rule it out. It's an easy check, and I'd hate to do all this other stuff thinking it's fuel related just to find out later it was spark.

 

[ScreaminToon]

Re: 1994 Evinrude 175hp Fires up and dies

So if a few plugs are fouled or something could that be a reason it would be hard to start... not starting Until its firing first on a good plug and then cannot maintain after that initial burst???

 

[kenmyfam]

Re: 1994 Evinrude 175hp Fires up and dies

Will it keep running if you keep squeezing the bulb ???
Does the primer bulb still have some pressure in it when it dies on you ???

 

[ScreaminToon]

Re: 1994 Evinrude 175hp Fires up and dies

no it doesnt run if you keep squeezing the bulb...

 

[kenmyfam]

Re: 1994 Evinrude 175hp Fires up and dies

no it doesnt run if you keep squeezing the bulb...

Does the primer bulb still have pressure though ???? and are the plugs wet after it dies on you ???

 

[ScreaminToon]

Re: 1994 Evinrude 175hp Fires up and dies

yes the ball has pressure... and yes the plugs are wet.

 

[ScreaminToon]

Re: 1994 Evinrude 175hp Fires up and dies

i think its spark because even when i shot some gas straight down the wholes its doing the same thing... i belive there is plenty of fuel. i just put brand new plugs in there... and same thing....what could just shut down like that just running accross the lake.. power pack?

 

[twostroke87]

Re: 1994 Evinrude 175hp Fires up and dies

You said that you blocked off the oil part of the VRO (Very smart move) But did you disable all of the sensors meant to detect oil level/loss, I know on the newer VRO models when disabling the oil half the the VRO, you need to disable all of the oil sensors so that it doesn't shut the motor off because it detects no oil, its not going to be able to detect that you are running 50:1 in your gas, your engine is blind to that and might be thinking crap no oil and shutting off.

 

[ScreaminToon]

Re: 1994 Evinrude 175hp Fires up and dies

that sounds good and all but why after 10 boat trips and why all of the sudden while going across the lake..

 

[jtcarter]

Re: 1994 Evinrude 175hp Fires up and dies

I'd check my fuel filter for trash, then do a compression check if both of those are alright. I'd point my finger at the powerpack as the next possible source.

 

[ScreaminToon]

Re: 1994 Evinrude 175hp Fires up and dies

so something is wrong with the ignition system for sure when im checking spark one time theres nothing than it will fire on 1 or 2 cylinders then nothing then a couple more...power pack? and if so how can i narrow it down to that for sure...

 

[jtcarter]

Re: 1994 Evinrude 175hp Fires up and dies

so something is wrong with the ignition system for sure when im checking spark one time theres nothing than it will fire on 1 or 2 cylinders then nothing then a couple more...power pack? and if so how can i narrow it down to that for sure...

Powerpack, plugwires, coils. If its your coils or plug wires you can start it at night and watch the fireworks show on the back of your motor. Usually with a bad coil or wire you'll see the spark jumping around. If you don't see any spark then more than likely its your powerpack. Look for cracks on the coil packs or any knicks in your wires.

 

[jonesg]

Re: 1994 Evinrude 175hp Fires up and dies

Agree with the above, quick troubleshooting can show the way,

if not ,
then you need a peak reading meter or DVA adapter for a regular multimeter.
Buy one or make your own, its simple.
http://forums.iboats.com/showthread.php?p=2016261#post2016261

Then do all the tests for power pack, coils and stator.
Read this for mastertech Bill Kelly's directions on your optical ignition.
http://www.maxrules.com/fixomcoisignition.html

 

[ScreaminToon]

Re: 1994 Evinrude 175hp Fires up and dies

im gonna buy the power pack im pretty sure thats what it is.... but i see they sell the pack alone or with the new optical sensors...should the sensor be replaced?

 

[jtcarter]

Re: 1994 Evinrude 175hp Fires up and dies

im gonna buy the power pack im pretty sure thats what it is.... but i see they sell the pack alone or with the new optical sensors...should the sensor be replaced?

I replaced both on mine. Probably could have done without it though. I would go ahead and buy it if it was me.

 

[nanastew76]

Re: 1994 Evinrude 175hp Fires up and dies

Im having the exact same problem with my 70 hp. I just ordered the power pack, It will be here in a couple of days, It was half price at wolffe marina on Ebay, should get it in a couple of days I will post if it worked on mine, Just thought youd like to know thanks