Crews have suspended the search for the night and will resume at 8:00a.m. Thursday morning.
The Fenton Township Fire Chief say no one will be allowed on the water until the man is found.
Divers searched three areas on the lake closely on Wednesday but didn't find anything.
Teams are using K-9 units, sonar, and several boats to locate James Lehmkuhle.
*** UPDATE 7-23 ***
The name of the missing boater has been released. He is 61-year-old Flushing native James Lehmkuhle.
Lake Fenton remains closed at this time, and police say that the dive team is on the way.
Stay with NBC25 for further updates.
*** END UPDATE ***
*** UPDATE ***
Genesee County Sheriff Captain Robert Heath tells NBC25 that a call came in after 8 last night about a "free floating boat" in the 850-acre lake. The victim, according to Captain Heath, is a 61-year-old from Flushing with previous health problems.
A helicopter from the University of Michigan searched the lake from three hours last night. A dive team is expected to arrive within three-to-four hours. They are going to use "side-scan sonar" in order to locate the missing man.
*** END UPDATE ***
Lake Fenton is closed at this time while authorities search for a missing boater. A woman, who describes herself as the missing boater's partner for 13 years, says the boat has been found, but there is no sign of her partner.
The boater, whose name has not yet been released, went missing yesterday. His partner, who is not identifying herself at this time, said that he went fishing.
The Fenton Township Police Department is searching the lake right now using a boat and a jet ski. A dive team and the Michigan State Police are coming in to help with the search.
A search was performed last night as well, but was called off until this morning.
Stay with NBC25 on this still developing story.