Primer kit on an SRX 700

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Bomberfan

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Hi guys,
I had posted before about a primer kit on my 2001 SRX 700 as it is a bear to start.
I have found a kit through Royal Distributing that includes the primer and hose and you install brass fittings into the choke cable ports, and this is where the fuel shoots in when primed.
What do you guys think about this? Is this a safe way to do it?
I am very interested in doing this modification but not at the expense of my engine if it's not a good idea.
Let me know, thanks!
 
u can put primers on these sleds doo haS DONE THIS FOR YEARS and u actually can use any primer set up that doo has for its sleds, put it on my exciter and works great. AL
 
Bomberfan said:
Hi guys,
I had posted before about a primer kit on my 2001 SRX 700 as it is a bear to start.
I have found a kit through Royal Distributing that includes the primer and hose and you install brass fittings into the choke cable ports, and this is where the fuel shoots in when primed.
What do you guys think about this? Is this a safe way to do it?
I am very interested in doing this modification but not at the expense of my engine if it's not a good idea.
Let me know, thanks!
Click to expand...


The one thing I'd be concerned with is where the fuel comes from. Is it out of the tank or out of the fuel pump? Coming out of the tank wouldn't be pre-mix so you may be washing the cylinders with each cycle of the primer.

May not be a big deal and it'd be better than using starting fluid but if it were me I think I'd be tapping into one of the three coming out of the pump.
 
snomofo said:
The one thing I'd be concerned with is where the fuel comes from. Is it out of the tank or out of the fuel pump? Coming out of the tank wouldn't be pre-mix so you may be washing the cylinders with each cycle of the primer.

That's what I was thinking too, to draw after the pump so it's mixed fuel. I am just wondering if dropping into the choke circuit would cause fuel to be drawn in after it's running because the choke plunger would normally seal this off after startup.
Click to expand...
 
Maybe, like with most things, it's safer just to leave it the way Yamaha has it setup.
 
Check to make sure reeds are in good condition & choke is working properly...
 
Last year we had quite a lengthy thread on starting with all starting issues and possible solutions being discussed.[I think it was called "why SRXs hard to start but not Vipers" or something like that.
I ended up putting a 700Sx redhead fuel pump[among other things] on my freshly overhauled 2002 SRX and had NO starting, or any other, issues all last season.
Bob
 
I have a bulb primer ran from the tank into the fuel pump. At the beginning of the season all I have to do is squeeze about a dozen times till I see fuel in my carb lines, choke it and pull maybe 3 times and she fires right up. Works slick as $#!t.
 
Corey9965 said:
I have a bulb primer ran from the tank into the fuel pump. At the beginning of the season all I have to do is squeeze about a dozen times till I see fuel in my carb lines, choke it and pull maybe 3 times and she fires right up. Works slick as $#!t.
Click to expand...

As Bob mentioned above this was discussed at length and if I remember correctly there were three hard start issues all rolled into one thread.

Hard start cold
Hard start after storage
Hard start after short soak (1-2 weeks)

My issue was after storage where on most other sleds I've owned, 5-7 pulls would fill the carbs but with my SRX, twice sometimes three times the pulls were required before filling the bowls.

After adding pre-mix in the cylinders for years I played around last year and found that pulling the plugs before tugging would increase crank speed enough to fill the bowls within 3-5 pulls.

I've never had short soak or cold start issues once into the season but others on the thread Bob mentioned did. I think Bob's issue was short soak while others that had cold start issues (the colder the ambient, the harder the start) went with block heaters or trouble light warmers.

I don't think a primer bulb was mentioned but it sounds like a good idea for short soak and after storage hard starts.

...and Bomberfan I'd also agree that unless the bottom of the plunger wells are sealed off somehow i'd expect that you'd be drawing fuel all the time. Maybe they use a check valve tentioned to not allow fuel to be drawn but to be overcome with the primer pump.
 
Ya only use the bulb for my after storage start or after I pull the carbs and the bowls get drained. Otherwise i just leave it alone and she fires up after 3-5 pulls.
 
Corey9965 said:
I have a bulb primer ran from the tank into the fuel pump. At the beginning of the season all I have to do is squeeze about a dozen times till I see fuel in my carb lines, choke it and pull maybe 3 times and she fires right up. Works slick as $#!t.
Click to expand...


Or, Just fill the tank and close the lid, locate the end of the fuel tank vent. Grab that bad boy, wrap your lips around it and give it a good blow. Lung pressure is pleanty unless your name is Weezy. Once you have some pressure in it just slip your thumb over the end of the line and watch your carbs fill. Works on every Yamaha I have ever messed with except my 4 stroke. It must have a different check valve setup in it.

I've been doin this for years without fail. I have no desire to pull on a rope more than needed and don't see any sense in wearing out a recoil either.

I've never owned a Yamaha that wouldn't start on 3 pulls but I've never owned a tripple either. Somthin just ain't right. This shouldn't be an issue.

opsled
 
sideshowBob said:
Last year we had quite a lengthy thread on starting with all starting issues and possible solutions being discussed.[I think it was called "why SRXs hard to start but not Vipers" or something like that.
I ended up putting a 700Sx redhead fuel pump[among other things] on my freshly overhauled 2002 SRX and had NO starting, or any other, issues all last season.
Bob
Click to expand...
Did you use the same year of pump, and are the mounts the same? Also were you having starting problems before this? Thanks, Mark.
 
The SX pump I used was off of my 1999 SX 700. The SX pump and the SRX pump mount the same, look to use the same casting except the SX pump does not have the rubber fuel bypass line and check valve installed.

I was having starting issues with my 2002 SRX after the sled sat for a few days or longer.

I experimented with:

- elliminating the fuel line loop between the tank + pump but found little improvement so I returned it to stock [I still think leaving the sled with a fairly full tank does help fuel gravity flow from tank to pump after a long sit]
-I hooked up a boat primer line to a hand held SRX fuel pump and found the fuel pump is VERY resistant to having fuel "manually" pumped through it, so I'm not sold on adding an "inline" primer
-I have two SRX pumps and neither one would pump much fuel at recoil speeds, if any, and it did not matter if they had the bottom vent hole open or closed, yet the 1999 SX fuel pump I have had no problem pumping fuel under identical conditions!!!????
-The original SRX fuel pumps had the vent hole at the bottom underside sealed from the factory, from what I observed, the 2000-2002 SRXs had the vent open as did the Vipers. Now...If you order a new fuel pump from Yamaha[which I had done] for a 2000 - 2002 SRX the part number has been updated[backdated] to the original 1998 fuel pump with the vent hole factory sealed[at least thats what I found when I ordered mine]

Using my original 2002 SRX pump[vent open] had no noticeable better or worse recoil speed fuel pumping capability then the new updated[vent closed] SRX pump.

Last season, I had no issues what so ever starting or running with the SX pump.

JM.02c

Bob
 
What is a 700Sx redhead fuel pump.

sideshowBob said:
Last year we had quite a lengthy thread on starting with all starting issues and possible solutions being discussed.[I think it was called "why SRXs hard to start but not Vipers" or something like that.
I ended up putting a 700Sx redhead fuel pump[among other things] on my freshly overhauled 2002 SRX and had NO starting, or any other, issues all last season.
Bob
Click to expand...


I am not familiar with this. Where can I get one? My SRX is terrible to start when cold.
 
Personally I would find the root cause and address it. When everything is working the way it should, you shoudln't have this problem. That said, a push/pull primer works if the problem is due to a shortage of fuel. Unless the main fuel circuits are plugged and you are using the primer line to keep it running, I wouldn't worry about the shortage of oil. The best fuel primer systems cycle fuel into the carb bowls and back to the tank, which ensures a fresh fuel charge. However, this never found it's way into sled carbs as far as I know.

The inline primer bulb or the blowing on the fuel line works great for priming when coming out of storage. I actually use the air compressor, but you need to be VERY careful with this as you can blow the fuel pickup fitting apart in the top of the tank. When you have a number of sleds to bring out of summer storage, you don't want to pull anymore than you have to. The vent line on many sleds is behind the cowl above the left footwell. Some models have it attached to a fitting in the steering gate.
 
I can't seem to find anything wrong with the sled, that is why I am looking at primers.

Just to recap, you could tell how cold it was by how many pulls it took. When sitting for any amount of time, like overnight, at -10 it would take about 15 pulls.-20, around 25, and at -30 it took 46 pulls, trust me I counted.LOL.

Last season, compression was at 130 PSI across, the carbs were cleaned, power valves cleaned, carbs sync'd, choke cables adjusted and reajusted, new plugs set at correct gap, fresh fuel etc. I even bought a new fuel pump from Yamaha and still no luck.

So if anyone has a suggestion on what I may have missed, please let me know, otherwise I want to try a primer system, or maybe a pump from an SX as suggested.

I want to do or try whatever I can to make this next season a little easier on the shoulder.

Thanks for the replies!
 
Did you test out the electrical components?

Also, are you sure that the starter circuits in the carb are clean, pilot circuits, air jets and passages?
 
Ding said:
Did you test out the electrical components?

Also, are you sure that the starter circuits in the carb are clean, pilot circuits, air jets and passages?
Click to expand...

I am absolutely sure all carb passages were clean last season. The electrical components though, I did not test. What do you suggest? Test the stator first?
Thanks, Mark.
 
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