[xzins]

I believe God overcomes bad theology to eventually get those who believe in His word to where He wants them to be.

Count on it.

He is faithful.

[MHGinTN]

The initial question was problematic. You asked, "If a Mormon is reading John 3:16 in the KJV and believes in Jesus, Is he saved?" IF the person in question is already a Mormon, we would have to have an idea of what kind of Mormon.

A devout Mormon already believes in the Jesus preached by Joseph Smith, and that Jesus is no more a Savior than Jim Caveazel. To be a professing Mormon is to have believed in the Jesus Joseph Smith preached, not the Jesus Paul preached. And there are huge differences.

In the same vane, if this 'Mormon' is reading John 3:16 seeking God's guidance, well then that person has not yet cast their belief in the Jesus preached by Joseph Smith and is open to the Holy Spirit leadership.

Could you clarify what sort of Mormon you had in mind with your initial question to SkyDancer?