Author Topic: Trying to prime the accel. pump It works!! Finally!! (Read 7120 times)

Trav-i · « **on:** January 10, 2011, 01:40:41 PM »

Anyone have a good way to prime the accel pump on PD carbs? I had a few leaks I had to deal with today, and am now trying to get the pump to squirt. So I'm open to any ideas cause I don't have a one.

Thanks

Travis

SOHC Digger · « **Reply #1 on:** January 10, 2011, 03:22:35 PM »

Take a flat blade screwdriver and push down on the top of the pump shaft. If you don't get anything squirting with about ten pumps, you probably have a check valve sticking. Take the bowl off #2 and soak the bowl and accelerator pump cap in carb cleaner for a few hours and then blow through with compressed air.

Spanner 1 · « **Reply #2 on:** January 10, 2011, 03:58:20 PM »

Hi Travis!
The check valves don't cause trouble usually.....unless you take 'em out and put them back upside-down, there is one in the acc. pump 'sump' and one in the carb body where the pumped gas flows from carb bowl to carb body.... I'm sure your familiar with all that !! One or two things tho'.... is the little o-ring in place where bowl meets body and have you verified the squirter 'posts' in each carb throat is clear ? The thin black rubber line between each carb carries the acc. pump gas to each 'post'. The opening in each post is extremely small and easily blocked. The acc. sump should fill ( prime ) no problem if the bowls are filling O.K........ Good luck,....... y'all snowed in ?

Trav-i · « **Reply #3 on:** January 10, 2011, 05:41:50 PM »

Hey Ray thanks for the tips! Yeah we're socked in pretty good. I just rescued a stuck abulance sitting on piece of sheet ice which is the current condition of every road we have. I think I'm about to go after another stuck one on a hil.

Trav-i · « **Reply #4 on:** January 11, 2011, 12:06:29 PM »

Well folks I've had a chance to really really really clean my carbs the last 2 days, and I still have a non-fuctional accel pump.

I have soaked all parts in carb cleaner, wire cleaned them as best I could, and blew compressed air through all the passages and still nothing. I have also checked the diaphragm twice for holes and made sure the Mickey Mouse ears had the proper holes. I don't get it. It's a simple system and yet it continues to elude me.

Anyway if anyone has any other ideas on the pump, please feel free to share them. I need them bad!

P.S. With everything put together and the bowl full of gas and off the carb, I can actuate the rod and nothing squirts out. Just thought I would add that too.

Travis

TwoTired · « **Reply #5 on:** January 11, 2011, 01:40:26 PM »

You have to verify that the two check valves only allow fluid to pass one way.

Carb bowl to pump

Pump to squirt nozzles.

Tugboat · « **Reply #6 on:** January 11, 2011, 01:45:05 PM »

Got nothing to add, but good luck.. mine is still F'd up.

Trav-i · « **Reply #7 on:** January 11, 2011, 02:08:58 PM »

Quote from: TwoTired on January 11, 2011, 01:40:26 PM

You have to verify that the two check valves only allow fluid to pass one way.

Carb bowl to pump

Pump to squirt nozzles.

Checked that again today. All worked properly. I'm still gonna keep plugging away, I'll figure this out eventually. $:-\$

Trav-i · « **Reply #8 on:** January 11, 2011, 02:38:52 PM »

Also a new question,

Will I be able to make the accel pump squirt with the bowl off the carb, or is it like bleeding the brakes where it has to be sealed to not let in out side air? Don't know why I just thought of that, just thought I'd run it by everyone here.

mrrch · « **Reply #9 on:** January 11, 2011, 05:37:28 PM »

My carbs were plugged at the outlets in a couple of the carbs and I had to use a small butane torch to heat up the nozzles to get them to unclog.

Spanner 1 · « **Reply #10 on:** January 11, 2011, 06:03:10 PM »

Yes, the #2 carb bowl containing the acc. pump should pump gas out the riser tube that would connect to the carb body ( memo about the little o-ring ) when off the bike and filled with gas.... it's not sealed from athmosphere in any way to make it 'pressurise' or anything.....when the diaphragm is depressed it forces fuel thru' the check valve and up the tube. If that won't happen, either the diaphragm is torn or the check valve is blocked or not checking !

Trav-i · « **Reply #11 on:** January 11, 2011, 06:23:00 PM »

As always thanks for the tips. I'm begining to think the problem is in the rest of the system and not in tne pump. Guess I'll check them again tomorrow.

BobbyR · « **Reply #12 on:** January 11, 2011, 06:49:55 PM »

Did u pass a thin wire from the carb throat down to the pump?

Trav-i · « **Reply #13 on:** January 12, 2011, 07:38:25 AM »

Quote from: BobbyR on January 11, 2011, 06:49:55 PM

Did u pass a thin wire from the carb throat down to the pump?

I didn't pass a wire that far down the system. However I did use compressed air on the system the other day, I had the number 1 carb off to fix some leaking o-rings and while it was apart I blew throught the accelp pump rail and it seemed clear. Plus I noticed today that it seems no fuel is getting out of the passage that goes to the carbs. Is it possible to get that check valve out to clean the passage? If not any good ideas?

Travis

New Edit,

I now believe that the diaphragm itself has to be bad. It still moves no gas what so ever, so for giggles I put the pump bowl back on with no guts in it (yes I know it leaked all over) but I was able to plug off the ports and when I put air to the fill hole in the carb bowl fuel came flying out of the check valve! So this tells me that the passages are clear, and for some reason I can't see the pump must be bad. Oh well it's just money right?

lrutt · « **Reply #14 on:** January 12, 2011, 09:29:50 AM »

If these are the stock carbs on the K7/K8, I had the same problem. What I found was that the diaphram / gasket that was in the carbs from new did not have the hole punched to allow gas to even enter the accel pump chamber. I used a small hole punch and place it where it needed to be and BAM, now have all 4 squirters working as they should.

This bike never ever did have them working from new.

BobbyR · « **Reply #15 on:** January 12, 2011, 09:44:32 AM »

Before taking everything apart check to see if the tubes you to the carb throats are open.

Trav-i · « **Reply #16 on:** January 12, 2011, 12:28:15 PM »

The carbs have been off the bike for a while now, just trying to get them clean and fully functional. The tubes are clear I ran air through them the other day. I just been trying to find out why the pump pushes no gas out, but like I said earlier I put compressed air to the pump bowl and fuel squirted everywhere so I know the passages are clear. Also the ears have good clear holes. No matter how much I pump it I get nothing coming out. So it leads me to believe that the pump is bad somehow.

gnarlycharlie4u · « **Reply #17 on:** January 12, 2011, 01:03:18 PM »

you have to prime these?

why don't you just twist the throttle to full a half dozen times or so?
doesn't the throttle action cause the pump to activate?

owait... i just realized the carbs AREN'T on the bike.
well...

Quote from: lrutt on January 12, 2011, 09:29:50 AM

the diaphram / gasket that was in the carbs from new did not have the hole punched to allow gas to even enter the accel pump chamber. I used a small hole punch and place it where it needed to be and BAM, now have all 4 squirters working as they should.

This.

also, this:
http://www.siriusconinc.com/pro-detail.php?pid=&product_id=1094

and don't forget this:
http://www.hondachopper.com/garage/carb_info/accelpump_valve_repair/page1.html

If this doesn't fix it then you're effed and you should just sell (or trade) me those poor unusable carbs for cheap.

SOHC Digger · « **Reply #18 on:** January 12, 2011, 04:31:31 PM »

Quote from: Trav-i on January 12, 2011, 12:28:15 PM

The carbs have been off the bike for a while now, just trying to get them clean and fully functional. The tubes are clear I ran air through them the other day. I just been trying to find out why the pump pushes no gas out, but like I said earlier I put compressed air to the pump bowl and fuel squirted everywhere so I know the passages are clear. Also the ears have good clear holes. No matter how much I pump it I get nothing coming out. So it leads me to believe that the pump is bad somehow.

$14 from www.partsnmore.com

Just change it and eliminate one more thing.

Don R · « **Reply #19 on:** January 12, 2011, 05:56:49 PM »

My brother had one that had a nozzle plugged. We ended up pulling out the brass squirter cleaning it out and then pressing it back in. The shop had a ton of hours in it until he pulled the nozzle out, then we were done.

Trav-i · « **Reply #20 on:** January 17, 2011, 06:19:38 PM »

I ordered a new pump last night. I sure hope this fixes my problem, I so want to take this bike on the relay ride, but will take my bobber if I have to.

Trav-i · « **Reply #21 on:** January 21, 2011, 08:06:20 PM »

Well I got my new pump today, and I still have the same problem.

well it looks like i'm gonna check the check valve guts to make sure their clean and clear.

mrrch · « **Reply #22 on:** January 22, 2011, 07:08:52 AM »

Go to Hondachopper.com and find the accelerator pump rebuild in the garage section. I used that to rebuild mine, great info.

Trav-i · « **Reply #23 on:** January 24, 2011, 01:16:24 PM »

Success! I finally got this blasted pump working! After my new pump kit failed to fix it, I decided to take the check valve apart. Low and behold the ball at bottom was stuck, so after some cleaning and reassembly it works perfectly.

I would like to say thanks to everyone who helped me out. Now I can finally put them back on and proceed with tuning, and then the best part RIDING IT!

Travis

Tugboat · « **Reply #24 on:** January 24, 2011, 01:53:00 PM »

Glad you're back on the road!!!

Trav-i · « **Reply #25 on:** February 14, 2011, 06:56:08 AM »

Hey all I decided to dredge this thread up one more time to let let everyone who helped me know that everything is working great now. I finally got a chance to ride it last night and man was it worth the wait. Again thaks to all who helped me learn more about these carbs then I ever would have on my own.

Thanks

Travis Thur

BobbyR · « **Reply #26 on:** February 14, 2011, 08:56:31 AM »

Travis, congratulations on sticking with it and a good result. In the words of one of our Mods "carbs suck".

juntjoo · « **Reply #27 on:** January 19, 2018, 07:43:39 AM »

Quote from: Trav-i on February 14, 2011, 06:56:08 AM

Hey all I decided to dredge this thread up one more time to let let everyone who helped me know that everything is working great now. I finally got a chance to ride it last night and man was it worth the wait. Again thaks to all who helped me learn more about these carbs then I ever would have on my own.

Thanks

Travis Thur

I know this is ancient but 100% applicable to me now. You said it didn't work to replace the pump. Was that because the check valve on the carb was still stuck? Both check valves on the carb and in the pump cover on my bike are faulty(flow in both directions) although I cleaned the heck out of them, so I guess I'm in the same boat here. Im just about to blow torch them...

btw, after cleaning the valves were you able to make the nozzles in the throats spray OFF the bike just by priming it? I know Ive seen the test online in different vids but so many carb variations sometimes things don't exactly match.

News:

Author Topic: Trying to prime the accel. pump It works!! Finally!! (Read 7120 times)