First of all, let me appologize ahead of time for any mistakes made while posting in this forum, I just signed up today, but am excited to be a member.
I've had this problem since I've owned this sled. For my 1999 Yamaha SRZ 700, the first time I try to start it each year, it's a BEAR to get going. Long story short, ether + 2ish hours of pulling & checking plugs will eventually get it running. Typically there is a milky white substance (aka moisture) that would gather on one of the 3 plugs. And once the sled got started, it would be fine for the season.
This year, I wanted to understand the root cause. While reading other posts and applying the learnings, here is what i've discovered/done:
- All 3 plugs do spark while attached to the plug wires lying near the opening of their respective cylinders
- I disconnected the fuel lines from the fuel pump to the carbs, and fuel is pushed out, when pull starting.
- The 3 carbs are inline (attached to each other). I removed the line of carbs, and opened the drain bolt/screw (size of a quarter) from the bottom of each bowl to attempt to drain out any collection of bad fuel
- Reinstalled carbs & fuel lines to find same results
- Do not smell gas, nor see any evidence of gas being supplied to the cylinders when I remove the plugs, as they are pretty well dry
- Do not see any milky white substance on plugs, as in previous years. This could be due to the fact that I stored it differently this year (under the deck vs. in the shed)
I'm just trying to get out ahead of this, plus I'm really ansty to be sledding again.
Let me mention that I don't have a gas shutoff switch, nor am I aware of any primer on this sled. Gas was treated at the end of last season with Stabil.
I'm sure the most-likely answer will be to clean the carbs, but initially, I'm a bit intimidated by the 3 inline carbs. I will say, once I get over this initial yearly pain, the sled runs like a million bucks. I'm just hoping my new-to-me 2003 Yamaha RX1 is about as fast & responsive.
Any help you have is much appreicated.