Turns over but no start, now what?

[LonesomeTriZ]

My 1989 Yamaha Pro-Hauler quad is giving me some trouble. It has been hard to start for a while. It use to start very easy. I would just bump the button and it would start right up. Even when it was cold or had not been run in a while I could trust it to start right up. I have charged the battery, cleaned the carb, tank, air box, and filter. I even changed the fluids while I was at it. This thing would start on staring fluid but that does no good now either. Now it just turns over and nothing more. I just checked for spark but nothing. I thought the plug might be bad but the spark tester I used did not light up either. So I am guessing it is the coil. Oh, I did check the fuse and it is good. I cannot throw parts at this thing right now so what else should I check? How do I check the coil? Is it possible the plug wire is bad?

[Howdy]

While I don't know this machine at all, I have seen more Yamaha Stators go bad than anything. If you have specs to check the stator I would start there.

The coil and wire can be checked easily. If it has 1 wire going to it Unplug that wire. Take a wire from the pos of the battery and touch it on the terminal of the coil. As soon as you touch it you should see a spark. remove the wire and touch it again for another spark. Repeat as needed. ;)
Howdy

[atc007]

Take your plug cap off the wire,trim the wire a quarter inch to shiny wire. Another ! New plug. If no go,check your grounds. I suspect pick up though.. Manuals should be available online. Monroe where are you !! Ohm it out and I bet you need a stator/or pick up. Good luck !

[LonesomeTriZ]

I will go try.

[84honda200s]

im saying stator or pick up as well. they are known for the stators going out on em.

[LonesomeTriZ]

I hope not. That is one of the more costly parts.

[LonesomeTriZ]

Update:
I cleaned the kill switch and now there is spark. However, it still just turns over and not start. It sounded like it tried a couple times but not by much. So, if it is still an electrical issue what could it be? How do I know if the spark is weak? I have not yet ruled out a mechanical issue yet. I will check the valve adjustment next. If that does not do it I cannot help but think it is a fuel issue. Which annoys me because I have already gone through the fuel system. However, something could have been stuck some where and decided to come lose after I put it all back together. Any thoughts?

[LonesomeTriZ]

So, I decided to pull the carb and check it. I found a build up of crap inside. I must have gotten some bad gads at some point. When I pulled it apart I found a clogged pilot jet. I tore the rest of it down and got it so clean it looked like a new carb inside and out. I re-installed it and the same thing. It juts turned over and no start. I shot some starting fluid and it started right up. Once I got the idle set it stayed running. My problem is I still need starting fluid to start this thing. I guess tomorrow I am on to the valves.

[atc007]

I thought you had cleaned the carb before? Yes,,intake valve is gonna be tight. Assuming your choke and passages are spotlessly clean and working. You've got her licked.

[LonesomeTriZ]

I did clean it. That is why I was so pissed when I found out it got nasty all over again. I did not even think it was going to be a fuel issue.

[atc007]

Gotta clean the tank then,all new gas,and Know you're good to go ! I would still check the valve clearance.

[LonesomeTriZ]

I installed a new filter and I am going to try and get gas tomorrow. I hate having to do things twice. I have not even ran a whole tank of gas through the carb since I cleaned it last.

[LonesomeTriZ]

Soooooo. I pulled the intake and tried to start it. Nothing. I placed my hand over the carb and turned it over a few times. Then, I tried to start it again and it tried but nothing. I pulled the choke and it fired right up. I shut it down and let it cool down. I stared it again with the choke on and it started after turning over a few times. I put the intake back on and let it cool down and tried again. This time it was tough to start with the choke but it did as long as I worked the throttle. Now, it is real hard to start and back fired a few times. I could not tell where the back fried came from though. It was a puff of white and it did not come from the exhaust. I want to get this carb right before I move on to the valves.

[atc007]

Do the valves first. If they're tight. You're just wasting time. You're getting closer...

[LonesomeTriZ]

I thought about that last night. I think you are correct.

[LonesomeTriZ]

I think I found the problem.

The vales are correct, the carb is cleaner than new and I put brand new gas in it after draining it. I tried to start it again and nothing. I then figured maybe it is sucking air through the intake. The intake is a molded rubber piece with aluminum flanges on the ends molded in. I pulled it and found a tear that I could stick two fingers in. I guess that would do it.

[LonesomeTriZ]

I cannot spend money on a new intake. So, I am devising a plan to re-use/repair this one. So far the only thing I have come up with a radiator hose. I can cut it to length then clamps it to the aluminum flanges. I would of course have to cut them out of the molded intake though. My issue with that is the intake supports the weight of the carb. So I may have to make a bracket to do that part.

[LT80]

Looks like a new piece is only 45 bucks or so.
Altho, According to the parts fiche, there is no 89 pro hauler????? A YFM250(that's what I looked up for a part price)??????
There are 700 and 1000 pro haulers in 2004.
I think I'd use the radiator hose too. :)

[LonesomeTriZ]

This is my 89 Pro-Hauler
http://www.yamaha-motor.com/outdoor/epic_atv/1989_prohauler_small.aspx

They are completely different from the later model golf cart type.

$5 is a lot of money when you do not have it. I cannot spend money on this quad but do I need it running. Normally, I would have already bought it. I found out out the radiator hose will not work. The inside has to be smooth. If I use the hose there will be lips the gas has to pass over. It will end up pulling on the hose inbetween the flanges. So, on to plan B.