jd 300 fuel problem

jdcat · Post by **jdcat** » Sat Jan 27, 2007 3:50 pm

To get my kohler 295 to start after sitting more than 15 min.s I have to spray gas in the carb.Its got a new carb kit,intank filter[check valve],And impulse line looks good visably.Once i get fuel to the carb,It runs ,idles great.Couple of questions,Are these check valves supposed to keep the fuel from running back into the tank A 100%,And can a pump diaphragm be put in upside down?,I mean should the metal disc side of the diaphragm be up toward the carb?this has the walbro impulse carb.If i put a primer i guess it would fix the problem,But would rather not.How bout the metering lever?If i adjusted it different,would that give me more fuel -pump to the carb? thanks.

400brian · Post by **400brian** » Sat Jan 27, 2007 4:49 pm

I don't think you can assemble the parts upside down, the holes are drilled off center so they only line up one way. I could be wrong about this, but that is the way I remember it. The check valve should hold fuel for an extended period.

Danzig · Post by **Danzig** » Sat Jan 27, 2007 5:49 pm

Anything can be put in upside down if your not paying attention. Each plate is doweled to promote easy assembly except for the main carb body. Read my post about the X8 problem. Harley has posted a pic from the manual that shows how the carb goes together. I consider myself a professional now on these carbs due to having them aparts and together about 20 times in the past months. I left zippers on my carb and through away the bolts......just kidding. The arm on the needle needs to be parallel with the main mounting surface on the main body of the carb, make sure the spring under it is locked in on the dimple on the arm. You will see minimal needle movement, but it does move. Bending the needle away from the carb will give you more fuel due to that will give the arm more travel and the needle will open farther, I recommend not doing this.

jdcat · Post by **jdcat** » Sun Jan 28, 2007 1:18 pm

Put another way,Why would a carb not pump fuel at startup,Yet run & idle good after startup?

Danzig · Post by **Danzig** » Sun Jan 28, 2007 1:33 pm

Cat-

Have you had this apart and seen the inside of it?

JDFanPa · Post by **JDFanPa** » Sun Jan 28, 2007 1:34 pm

My x4 [same motor] pulls gas right up to carb and idles runs fine when started. But on a cold star or after sitting an hr or so it will not start without a shot of fuel. Ive never checked into t any further but it seems kinda a problem to the kohlers. Now my 73 300 starts right up off the choke but its not a wally carb on it either so who knows. I was gonna take the primer route on the x4 myself.

jdcat · Post by **jdcat** » Mon Jan 29, 2007 3:55 pm

yeh.had the heads off everything looked real good.Previous owner put in rings,gaskets, seals,{never honed the cyl.s],but couldnt get it to fire.He figured it needed points ,didnt want to mess with it anymore so sold it to me.after i put new points in i still only had spark to one cyl. Fought the ignition problem for Many hours.Was going to pull the interior igntion coil,But seen the same motor on ebay.Had a bidding war going ,but won .Engine was supposed to have good compression ,But ended up with 120 in pto side cyl,90 mag side.So out came the stator ,put it in the original motor & fired right up.Made it a mission to get this thing running,For all the time i put in it.original motor has both cyls at 110 .Yesterday i shortened the fuel feed hose in the tank[w/the check valve] & it seems to have helped the problem with the fuel running back to the tank.Looks like ill have 3 options,carry a spray bottle on the sled,[course then ill have to leave the cowl off],put on an in dash primer,{bulb wont work or i cant get at it with the cowl on], or put in a battery for elec. start.Am curious about the windshield,Looks to me it fastens to the cowl,Does that mean the windsield has to come off,then all the scews holding the cowl on ,just to get good access to the motor?Also have a 72 -292 onebanger[kawasaki] lynx & am wondering if the twin 295 kohler can go faster.

grasscutter97 · Post by **grasscutter97** » Mon Jan 29, 2007 4:48 pm

JDFANPA was right on with his description of it not firing off immediately after sitting. That is very common with the 295 kohlers (even the really good running ones) A $5 inline primer bulb under the hood will do the trick everytime.

Yes you are right about the windshield attaching to the cowling.

Not sure if the 295 will run faster than your kawi. It has been my experience that the JD300's are geared and clutched very low! With a bit of clutching work, the 295 engine could be a real nice screamer. I've thought about doing some testing with mine, but that will have to be a project for next year.

400brian · Post by **400brian** » Mon Jan 29, 2007 7:46 pm

Yeah, Deere could have made engine access easier. It always tees me off that I have to remove the windshield to get the engine cover off. But hey, you should hear the proceedure for a Skiroule, first you remove the seat!

:o

BTW, I have a NOS Bosch stator for the Kohler. Points, condensers, all the coils
$25.

Rodimus Prime · Post by **Rodimus Prime** » Mon Jan 29, 2007 8:35 pm

dont complain try removing gas tanks from newer sleds for steam cleaning.. NOW thats a chore and ahalf.

the x00 sleds have 6 feet of fuel lline one way from tank to carb.(4 feet if run incorrectly). primers both dont help much it requires usally two or three good pulls to get fuel to carb then it works normally.