89 gl1500 won't start


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mothership
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89 gl1500 won't start

Postby mothership » Thu Feb 19, 2015 12:39 pm



Can't get my 89 gl1500 to srart.
Mine is pretty much a daily driver. One morning I went to start it and it and it sounder real wierd
like no compression on a couple of cylinders or something. I finally got it started and once it warmed up and started firing on all cylinders
it ran fine.Had that same problem 4 or 5 more time and now I cant get it to run at all. Battery is good and fully charged 13.3 volts. I pulled all the plugs and am getting spark to all
cylinders but decided to put new plugs in anyway because I am sure I flooded it trying so start it thus it is getting gas. Fuel filter is an aftermarket glass
one so I can see its getting fuel and the fuel pump is working. Air cleaner is a K&N and clean. Thought it might have jumped time but why would it run
OK after I did get it started and also valves would probably be hitting the tops of the pistons. Kill switches are working properly
So it's getting gas, air, spark but won't start
Steve



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Re: 89 gl1500 won't start

Postby WingAdmin » Thu Feb 19, 2015 2:34 pm

Go back to your battery. Just because it is sitting idle at 13.3 volts doesn't mean it's healthy. More important is the voltage when under load.

GL1500's need a LOT of power to run. If your battery is weak, sucking a ton of current out of it to start the bike leaves you with low voltage, which will cause the bike to make weak spark, and it will stumble and run poorly as a result. Once the alternator charges it back up, the bike will run fine.

Put your voltmeter on the battery and measure the voltage both during starting and immediately after starting.

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virgilmobile
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Re: 89 gl1500 won't start

Postby virgilmobile » Thu Feb 19, 2015 9:32 pm

The last time I had problems starting, it was an accumulation of water in one carb bowl.
Plugged the jets...had plenty of volts and spark.Sometimes it would try to run...
I tried to drain the carb bowls too...nothing came out....
I ended up using compressed air blowing into the vent tube to eject the crud from the carbs....
By the way...getting to the drain screws on the 1500...sheesh...ya need a 2 foot long flat blade screwdriver and go in above the front wheel and between the radiators....

By the way again...my problem happen more than once...I traced it back to condensation in the upper vent crossover pipe..
I really expected it to be in the fuel tank.
.I added a 2 foot length of hose to it to fix the problem.

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Re: 89 gl1500 won't start

Postby spiralout » Thu Feb 19, 2015 10:26 pm

virgilmobile wrote:By the way...getting to the drain screws on the 1500...sheesh...ya need a 2 foot long flat blade screwdriver and go in above the front wheel and between the radiators....

Got one sitting right next to my 2 foot long phillips for the carb to intake rubbers :lol:

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mothership
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Re: 89 gl1500 won't start

Postby mothership » Wed Feb 25, 2015 8:36 pm

Ok I checked the timing belts and they are fine did a compression check and guess what! No compression in any cylinder
What the .....?

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Re: 89 gl1500 won't start

Postby bstig60 » Wed Feb 25, 2015 9:42 pm

How did you check the compression??
Bill

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mothership
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Re: 89 gl1500 won't start

Postby mothership » Thu Feb 26, 2015 12:27 pm

Like it says in the book Pulled all plugs, opened the throttle all the way, kill switch on and screwed in the compression gauge. Let it turn over about 5 times and nothing and I am sure the gauge is working
Steve
916 380 9401

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Re: 89 gl1500 won't start

Postby bstig60 » Thu Feb 26, 2015 12:44 pm

Before I did anything else, I would pull the timing belt cover and check that the cam/valve timing is where it should be, then I would pull the valve covers and make sure cams are working. Almost sounds like a broken timing belt. I am just up the hill from you. Let me know if you need some help......
Bill

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Re: 89 gl1500 won't start

Postby virgilmobile » Thu Feb 26, 2015 9:35 pm

Peaked my interest....I've never heard of no compression on all 6 cylinders...That would have to be both sides not operating....
That would have had quite a bang if 1/3 of the valves hit the Pistons and broke the belt or cam...on both sides...
Is it possible starter and some internal parts are running but not actually turning the engine over.???

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Re: 89 gl1500 won't start

Postby bstig60 » Thu Feb 26, 2015 10:06 pm

Virgilmobile: Good point! I wonder if it is possible that the splined shaft stripped on the starter motor....., Many starters have a reduction gear inside which utilizes a planetary gear. I have seen these slip inside the case. Is this a possibility??
Bill

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Re: 89 gl1500 won't start

Postby virgilmobile » Fri Feb 27, 2015 9:56 am

I'll believe anything nowadays.
No compression on all 6 cylinders is very unusual.Its just a gut feeling that there's something else going on rather than the cams not turning.
Leave the plugs out,shine a light and see if the piston is moving when its cranking.
Also,the poor running may simply be trash in the carb and not related to this.
More inspection is in order.
Please keep us posted.Take pictures too.

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Re: 89 gl1500 won't start

Postby mothership » Sat Mar 07, 2015 3:22 pm

Timing belts are fine and all timing marks line up. Checked and all cylinders are going up and down I blew through the compression gauge hose and did hear air coming out of the carburetor What would cause the intake valves not to seat completely?

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Re: 89 gl1500 won't start

Postby dennislp » Sat Mar 07, 2015 8:36 pm

are the cam gear bolts loose or nut on crank . can you see belts turn when you hit starter

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Re: 89 gl1500 won't start

Postby dennislp » Sat Mar 07, 2015 8:38 pm

how many miles on eng

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Re: 89 gl1500 won't start

Postby bstig60 » Sat Mar 07, 2015 9:17 pm

127,000 isn't that many miles for a GW engine. From what I can understand, it would appear that you have bent intake valves. If there is play in the timing belts, its possible it has jumped time. The idea of the lifters pumping up too high and keeping the intake valves from closing all the way seems a bit "out of the box" to me. Perhaps someone has some other ideas.
Bill

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Re: 89 gl1500 won't start

Postby 702scottc » Sat Mar 07, 2015 10:30 pm

Are you absolutely certain the cam timing is correct? If so then with the spark plugs out, squirt a little oil down a couple of the cylinders and crank it a few times to see if the compression perks up. If it does then rings are siezed, if not then either all the intake valves are bent or the heads lifted. On all 6 at the same time is very strange.

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Re: 89 gl1500 won't start

Postby WINGER3 » Sun Mar 08, 2015 7:36 pm

This may sound stupid, but have you checked the pressure release valve on the gauge is not stuck open so it will not pump up, I'v had this happen on one of mine, took me a while to find out. Good luck, I hope it's something simple. :mrgreen:
DON'T DESTROY IT-RESTORE IT

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Re: 89 gl1500 won't start

Postby Wingryder1 » Sun Mar 15, 2015 11:55 pm

Wow... keep us up to speed on this one. Very strange. I would bet there are many wingers that would love to walk up your driveway and see this weird problem in person. Make sure your gauge is working. Stick in in the lawnmower. Or at the very least stick your thumb over the plug hole as you crank. Have all plugs out so starter can really spin it. As mentioned above double check timing belts and timing before any more cranking.
Someone mentioned 1500's needing robust starting power. I rigged up a voltmeter off the starter. Even with a warm engine. it will pull it down to 7 volts before it fires. Pretty low... I have to always release starter button to get ignition.

Very interested to see what you find here. Please keep posting tests and results.

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Re: 89 gl1500 won't start

Postby bstig60 » Mon Mar 16, 2015 12:10 am

Wingryder1: ( it will pull it down to 7 volts before it fires. Pretty low... I have to always release starter button to get ignition.) That's a sure sign of a battery going bad. Time to replace it with an AGM battery, my friend......

Read more: viewtopic.php?t=25851#ixzz3UWRhiHAZ
Bill

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Re: 89 gl1500 won't start

Postby someguy » Sat May 02, 2015 11:48 am

Any update to this one? I am going through this exact issue on a 90, had a thread going a month or so ago. Finally sent the carbs to a local mech for rebuild and have them back in. Still the same. Really want to ride, thanks

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Re: 89 gl1500 won't start

Postby Wingryder1 » Sat May 02, 2015 5:05 pm

I would think any mechanic good enough to rebuild the carbs would have a idea what is wrong. What did he say?? Walk us through what the symptoms are and what you have done.
All we need is fuel, spark, compression all at the correct time of course and it has to run. You can immed determine if fuel starvation is the problem with a shot of starting fluid while cranking. (don't get carried away.. one or two times only. It washes the cylinders and that is not good for lubrication)
However if the fuel pump is delivering fuel (you have checked right) and you have rebuilt carbs.. time to look somewhere else.
What do the plugs look like when you ground them.. nice blue spark? Hope so.
If not it could be anything from faulty kill switch to those ignition pulse generators on the timing belts. ( I hear this is the problem on many of these posts.) Stick your thumb over a spark plug hole and see if compression blows it out.
Well you get the idea.. and you might want to link us over to your old thread to see what you have already ruled out.
Good luck.. It will run.
wingryder

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Re: 89 gl1500 won't start

Postby seelyark1 » Sun May 03, 2015 7:30 pm

Oh Man.... :( :( The suspense is killing me. :) I can think of no way possible for there to be no compression except holes burnt in all the pistons. And I bet I can walk on water before that happens. :lol:
Ride safe, and smart. Asphalt is like #1 grit sandpaper. Dave

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Re: 89 gl1500 won't start

Postby bstig60 » Sun May 03, 2015 7:54 pm

Valves not closing all the way would do the trick.
Bill

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Re: 89 gl1500 won't start

Postby virgilmobile » Sun May 03, 2015 9:30 pm

I agree...but at least one per cylinder on both sides.?? Kinda unheard of....something horrible happen in the oil and stuck the lifters.??...

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Re: 89 gl1500 won't start

Postby bstig60 » Sun May 03, 2015 9:34 pm

Another possibility is it jumped time and bent some valves.


Bill


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