I rebuilt a 87 Foreman TRX350 4×4 but still have trouble starting when cold.
Got fuel, spark, compression and spark plug is dark brown when trying to start. Running the plug turns light tan and runs fine. Is this hard cold starting normal for these older ATVs. There are not many 87 TRX350 around here to ask about this problem. I think the problem is with the cold fuel enrichment system but even the factory service manual doesn’t say much about its operation. It seems to want to start but doesn’t start when cold. Any help will be helpful. Doe anyone else have this problem on the older ATV models?

Thanks,
Sunny

I rebuilt a 87 Foreman TRX350 4×4 but still have trouble starting when cold.
Got fuel, spark, compression and spark plug is dark brown when trying to start. Running the plug turns light tan and runs fine. Is this hard cold starting normal for these older ATVs. There are not many 87 TRX350 around here to ask about this problem. I think the problem is with the cold fuel enrichment system but even the factory service manual doesn’t say much about its operation. It seems to want to start but doesn’t start when cold. Any help will be helpful. Doe anyone else have this problem on the older ATV models?

Thanks,
Sunny