Clinician
Currently Offline
Posts: 2
Likes: 0
Joined: Apr 13, 2012 19:09:34 GMT -6
|
Post by jreggers on Apr 13, 2012 19:48:44 GMT -6
I have a barn find 1977 Honda Express. I thought it would be a fun project my girlfriend's younger old son and I to clean up. It had been sitting for over 10 years but it was free so I figured it was worth a shot. Remarkably we've been able to get it running without too much trouble and we have been slowly working our way through the little issues like cleaning the carb, de-rusting the gas tank, new brake pads and the like. One of the problems I can't figure out is the reserve tank. The fuel valve has 3 positions. On, Off and Reserve. Fuel runs through fine when turned to On, but nothing from Reserve. You can see what the valve looks like in the attached picture. I removed it from the petcock and blew air through it. As you might guess the Air went through fine when switched to On, but couldn't get anything through when switched to reserve. The plastic tube you see in the picture is needed to run up through the petcock and into the fuel filter that sits in the opening of the fuel tank. However this tube is about half the size of the petcock. My guess is that when switched to On the fuel is sucked through this tube. Then when it is switched to reserve it should be able to somehow draw fuel from around the tube. On my fuel valve at the base of the tube there is an o ring to make a good seal and some sort of grout like substance. It looks like fuel could be drawn through here if the grout stuff wasn't there. But the grout substance could also be there to hold the tube in place. Is it possible that this grout like substance is simply built up corrosion (it does scrape away fairly easily) or am I missing something else here. The problem is that the fuel tank is so small this is really limiting how far the scooter can run. We have to fill up fairly often to keep it happy, especially when hills are involved. I can buy a new one off of ebay, but I'd like to do some research my options before shelling out the money. Anyone have any thoughts or experience with this sort of thing? Any help would be appreciated. Thanks. Attachments:
|
|
Scooter Doc
Currently Offline
Posts: 1,936
Likes: 7
Joined: Jun 18, 2010 22:25:14 GMT -6
|
Post by sprocket on Apr 14, 2012 13:54:12 GMT -6
That is a tank mounted shut off valve they all have 3 positions but you only use on and off.. the reserve isn't used...
It is usually one of these or a petcock but not both in my experience...need to see if you can find the shop manual for that Honda , they should be on the internet
|
|
Scooter Doc
Currently Offline
Posts: 1,936
Likes: 7
Joined: Jun 18, 2010 22:25:14 GMT -6
|
Post by sprocket on Apr 14, 2012 14:12:04 GMT -6
|
|
|
Post by Alleyoop on Apr 14, 2012 14:48:45 GMT -6
Jreggers, You are correct when on reserve it is supposed to draw the fuel from around the Tube at the bottom. So in reality the reserve is When the FUEL Level goes below the tube...LOL some reserve(HAHA). I know because I fixed my neigbhors honds express, what I did is switched over to reserve and blew air through the fuel outlet until air came out by the tube. If it is so messed up just cut the damn tube down. Alleyoop
|
|
Scooter Doc
Currently Offline
Posts: 1,936
Likes: 7
Joined: Jun 18, 2010 22:25:14 GMT -6
|
Post by sprocket on Apr 14, 2012 16:11:46 GMT -6
Cheap way of doing a reserve! only use the half the tank!!!! LOL...I agree just cut the tube down or remove it and use an inline fuel filter...for a gravity feed engine...like a snowblower, generator, lawn tractor etc... Attachments:
|
|
|
Post by Bashan on Apr 15, 2012 5:39:28 GMT -6
A little bit farther down on the site we have a Library that is filled with a wealth of information. Inside the Non-Chinese section is a board that has the complete service manual for the Honda Express. In side this maual I found this chematic of the fuel system:
One of the problems I can see is that the 2 cycle oil and regular oil are contained within the same tank. This undoubtedly puts a crimp in the storage capacity. Also, as the guys pointed out. the reserve cock simply points a little lower in the tank. I personally would find a way to mount an auxillary tank on this scooter so that you are not constantly reaching for the can. Rich
|
|
Scooter Doc
Currently Offline
Vespa Specialist
Posts: 426
Likes: 6
Joined: Feb 26, 2011 20:14:53 GMT -6
|
Post by Kaveman on Apr 15, 2012 19:06:49 GMT -6
Is this a gravity feeding system (Non vaccume) ? There could be a smaller seperate oil tank put in when the gas tank was manufactured. The top of my stella's fuel tank has the oil fill cap on the same top as the fuel cap but goes down a tube into a smaller 1qt oil tank below the gas tank . will c.
|
|
Clinician
Currently Offline
Posts: 2
Likes: 0
Joined: Apr 13, 2012 19:09:34 GMT -6
|
Post by jreggers on Apr 24, 2012 13:10:07 GMT -6
Thank you all for posting. Alleyoop, you were right on. I had to go out of town for work but when I got back I pulled the petcock and pushed air through it until it cleared out whatever was blocking the reserve setting.
It's amazing to me that a 35 year old engine that had been sitting for at least 10 years only needed a little de-rusting, a carb clean and cleaning out that valve and now it runs great.
Thanks for your help. It's because of forums like this that I can get away with trying to tackle these projects.
|
|
Senior Clinician
Currently Offline
Posts: 212
Likes: 2
Joined: Jun 1, 2011 16:30:33 GMT -6
|
Post by cdoublejj on Apr 25, 2012 3:38:31 GMT -6
They used better metal back then compared to today's china products.
|
|