Jacobsen/Homelite 420 snow blower primer

[jwales]

I cannot find the model or serial number for this unit. It appears to be very similar to a Tecumseh 2 stroke. I am fixing a friends old Jacobsen 420 snow blower. It had been sitting around for several years with no use. So first thing is toss all fuel lines and replace. dismantle carb and clean, clean tank. Primer bulb was rotted and partially missing so I just put a screw in the line temporarly while I tried to start it (it has a manual choke). Got it running surprisingly the first time and did the carb adjustments. All is well except that gas was squirting out the primer line under the screw, so I am guessing this primer actaully pushes gas instead of air??? With that said I have found some skematics for this blower but none of them have a primer bulb listed so am guessing this is to old. Any idea what might work in its place?? Any other manufacturers use this type of bulb that I could convert. I looked at a couple briggs mower primers I had laying around and they have a hole in the bulb.

Thanks

[bgsengine]

what kind of carburetor is on it? diaphragm carburetor? float carburetor? if it is a diaphragm carburetor and you have gas squiring out the fuel line, something is not set right.

- for a "wet bulb" primer, if it is remote, there will be two lines to it. Otherwise, it is a dry bulb primer and should only pump air, will have a vent hole somewhere, usually in the bulb itself.

It probably IS a tecumseh engine, and very likely something is not put together right if you have gas coming out the primer hole - if it is a float carburetor, your carburetor is probably leaking / overflowing

[jwales]

It is a Walbro, diaphram carb. It has a remote primer. Bulb next to ignition on frame with single line going to bottom plate of carb. There is another line coming off that same plate on carb and connecting to the underside of the engine near base of head (maybe some type of pump?) and then a line connection next to that which T's into the fuel line.

Is it possible to take some photos with my camera and post them?

[bgsengine]

yeah you can take photos and put them up on photobucket or somewhere and link them here. If they are resized to 600px width they can be embedded using the img tags

Sounds like you have an incorrect assembly - the line off the engine block to the carburetor will likely be the pulse hose that operates the fuel pump - may be getting gas into that line, too, have you checked? That, or the lines are incorrectly routed or hooked to the wrong fittings. unless you have somewhere for the fuel to go to, I can't think of any primer I have ever seen that would have gas going to it, without someplace for it to go.

[okie]

Is it possible to take some photos with my camera and post them?

If you know how to email photos and want to, email the pictures to me and I will post them for you.

travisodom@yahoo.com

Travis

[jwales]

Okie, thanks for offering to post some photo's. OK One of the photos shows the top of carb where primer line (yellow tygon tubing) and pump line (black tubing) come out of carb. These are how the existing lines ran when I got it. The other two are just different angle shots. Now on the "bottom side"/"backside" of the engine are two fuel line connections(vertical from head to crank case). One goes from the line on carb to the bottom side. the other comes from the main fuel line to the top one. Now I may not/ dont know if have these correctly connected. Can't find any info as to proper connections but the line going to the carb is attached to the lower one closest to the crank and the line from the fuel source is the upper one. What is proper connection??? Hope this makes sense.

The model number for blower is UT35016 and a stamping on the Walbro carb is "HDC" and below that is "L". It looks like a carb kit is available but rather expensive. Not sure of carb replacement cost.

[okie]

[okie]

Hey Joe---
I think I got it.


Travis

[KE4AVB]

Okie, thanks for offering to post some photo's. OK One of the photos shows the top of carb where primer line (yellow tygon tubing) and pump line (black tubing) come out of carb. These are how the existing lines ran when I got it. The other two are just different angle shots. Now on the "bottom side"/"backside" of the engine are two fuel line connections(vertical from head to crank case). One goes from the line on carb to the bottom side. the other comes from the main fuel line to the top one. Now I may not/ dont know if have these correctly connected. Can't find any info as to proper connections but the line going to the carb is attached to the lower one closest to the crank and the line from the fuel source is the upper one. What is proper connection??? Hope this makes sense.

The model number for blower is UT35016 and a stamping on the Walbro carb is "HDC" and below that is "L". It looks like a carb kit is available but rather expensive. Not sure of carb replacement cost.

K10-HDC kit are fairly reasonable At around $8.00 USD plus that dreaded shipping charge. As replacement carburetor it would need something other than HDC; they are no longer available per Walbro.

With that said I have found some skematics for this blower but none of them have a primer bulb listed so am guessing this is to old. Any idea what might work in its place?? Any other manufacturers use this type of bulb that I could convert.

Try this link http://www.ereplacementparts.com/homelite-ut35016-420-snowblower-parts-c-18807_201751_201756.html

The primer bulb is item 45 on the Auger and Drive page; but of course, it is also list as NLA so you probably need to retro fit a Walbro primer 188-508 bulb.

[bgsengine]

Small Black hose is the fuel pump pulse hose, connects to crankcase and just operates fuel pump, it appears, while the tygon hose is a primer in that it manually works the fuel pump, either case they should NOT have fuel getting to them - they should only be pumping air back and forth - if you have fuel (can see it in the tygon line) in the lines, then your diaphragms are ruptured or assembled wrong. Only hose that should have gas in it is the fuel line from fuel tank.

Primer just pumps air to the fuel pump diaphragm to make it pump fuel , but no fuel should be on that side of the system, so I am betting you need at least a diapragm and gasket set (D10-HDC, which is even cheaper than the K10-HDC kit)