Author Topic: El Tigre Test Run  (Read 3083 times)

Offline 2qik

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El Tigre Test Run
« on: January 09, 2011, 08:28:53 PM »
Last Thursday night I took the El Tigre for a shake down and it was all smiles!  I had 2 gallons of fresh 20:1 premix in the tank and thought I managed to run it out of fuel.  We did about 8 miles and it died out, could see fuel lines had air and the tank was low.  Took it out again today with a full tank and it died out around 10 miles in.  Again, air in the lines but this time 3/4 tank of gas.  Plugs show a nice tan.  Time to go through it a second time... 

The pictures from today.  Trailside classic.

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Offline 2qik

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Re: El Tigre Test Run
« Reply #1 on: January 09, 2011, 08:30:13 PM »
More smiles.

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Offline 2qik

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Re: El Tigre Test Run
« Reply #2 on: January 09, 2011, 08:32:42 PM »
Sun getting low in the sky, kitty napping with air pockets in the fuel lines.  Temp gauges don't show overheating but they are near 40 years old.  Let it sit for about 5 minutes and it fires only to go down within a few minutes of coming to life.

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Offline Howie

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Re: El Tigre Test Run
« Reply #3 on: January 09, 2011, 11:34:17 PM »
Whats the compression on it?
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Offline Up Late

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Re: El Tigre Test Run
« Reply #4 on: January 10, 2011, 09:03:28 AM »
Check the line in the tank. Could be broke off in there. Check vacuum line to fuel pump for cracks.
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Offline 2qik

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Re: El Tigre Test Run
« Reply #5 on: January 10, 2011, 10:27:34 AM »
Whats the compression on it?

150 psi both sides.  I beleive it's a fuel problem.
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Offline Up Late

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Re: El Tigre Test Run
« Reply #6 on: January 10, 2011, 10:33:48 AM »
Whats the compression on it?

150 psi both sides.  I beleive it's a fuel problem.

What's the compression when it's warm? Does it have spark when it quits?
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Offline AdrenalineJunky

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Re: El Tigre Test Run
« Reply #7 on: January 10, 2011, 10:34:55 AM »
UL is right.  The pick up line in the tank tend to rott out from sitting in fuel.  If that's ok, I'd go after the fuel pump diaphram. Looks nice 2qik!
Famous quotes;

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Offline 2qik

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Re: El Tigre Test Run
« Reply #8 on: January 10, 2011, 10:38:50 AM »
Check the line in the tank. Could be broke off in there. Check vacuum line to fuel pump for cracks.

Prior to my first ride I drained the tank, cleaned it out (maybe not good enough), put a new line inside with a brass fitting on the end but not a filter.  Could be picking up some tank sediment.  Replaced tank to pump line & put a new filter on it.  The pump to carb lines checked out good.  I did not check the vacuum line but that is next along with an in-tank filter.

- 2qik
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Offline 2qik

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Re: El Tigre Test Run
« Reply #9 on: January 10, 2011, 10:43:10 AM »
Whats the compression on it?

150 psi both sides.  I beleive it's a fuel problem.

What's the compression when it's warm? Does it have spark when it quits?

Didn't have a compression gauge on the trail...  :nana:

I would say spark and compression are good if the plugs are tan.  Lack of spark or compression would have it going down with wet plugs.
« Last Edit: January 10, 2011, 10:47:25 AM by 2qik »
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Offline Up Late

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Re: El Tigre Test Run
« Reply #10 on: January 10, 2011, 11:03:07 AM »

Didn't have a compression gauge on the trail...  :nana:

I would say spark and compression are good if the plugs are tan.  Lack of spark or compression would have it going down with wet plugs.

I've seen old ignition components get hot and fail. Plugs won't have a chance to get wet when that happens. When they cool back down they work again for a while. The first place to look is the fuel line and start in the tank. If everything in the fuel delivery looks good, I'd start looking at the electrical.
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Offline ZiRT

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Re: El Tigre Test Run
« Reply #11 on: January 10, 2011, 02:54:17 PM »

Didn't have a compression gauge on the trail...  :nana:

I would say spark and compression are good if the plugs are tan.  Lack of spark or compression would have it going down with wet plugs.

I've seen old ignition components get hot and fail. Plugs won't have a chance to get wet when that happens. When they cool back down they work again for a while. The first place to look is the fuel line and start in the tank. If everything in the fuel delivery looks good, I'd start looking at the electrical.
CDI box.  I've had it happen more than I care to remember. Sometimes they'd run until it got warm, sometimes they'd only fire on one cylinder, sometimes it'd idle great but die when you throttle it.....  At least they're relatively cheap now, used to be over $100, but I think you can pick one up for less than $60 now.
Gorgeous sled BTW!  I still pine for a '73 400 like I had as a youngster.  :thumbsupsmileyanim:

Offline SNO4ME

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Re: El Tigre Test Run
« Reply #12 on: January 10, 2011, 02:57:22 PM »
Wouldn't a pinched gas tank vent line have the same symptoms?
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Offline RevManII

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Re: El Tigre Test Run
« Reply #13 on: January 10, 2011, 02:58:41 PM »
I had the same symptoms in my '73 Johnson when I first got it. Ran for a few miles then crap out. Let it sit, it would start and run a little bit and die again. I had to get the sled back with one hand operating the primer, and the other on the throttle. Replaced the fuel pump with an aftermarket. Haven't had any problems since.

Offline Howie

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Re: El Tigre Test Run
« Reply #14 on: January 10, 2011, 03:07:18 PM »
Wouldn't a pinched gas tank vent line have the same symptoms?
That is what I was just thinkin readin the other comments. I've seen the same thing happen from the line getting frozen water in it.
Life is tough, but it's tougher if you're stupid!
You have 2 ears and 1 mouth. Use them proportionally!