Terra 720D radio problems-1 watt power

I have a Terra 720 D radio. When I hook a power meter up to it, it registered 1 to 1.2 watts with a reflected energy of .01 to 1.2 watts. This calculated out to SWR's of 1.2 to 2.6 at Frequencies of 118.00 to 136.97 MHz. The manual says it is a 5 watts nominal and 20 watts PEP transmitter. The power meter was designed for 140 to 250 MHz. So here are my questions, Is it possible to turn up the power output to closer to what it should be? What shoud that value be? Will the fact that the power meter was designed for 140 - 250 MHz skew that results so that are not relavent? Are the SWR's indicative of a bad anntenae? Can it be fixed by a radio shop or if the power output is low, is there any remedy? I am powering it with 14vdc through batteries and they were fully charged for the testing. I am trying to isolate the problem. Here is some of the data. Any ideas?

118.0
0 MHz
Forward Power= 1.2 Watt
Reflected = .2
SWR = 2.37

122.90 MHz
Fwd Pwr= 1
Refl = .2
SWR = 2.616

136.97 MHz
Fwd Pwr = 1 watt
Refl = .01 (nil)
SWR = 1.2

Dummy load
Fwd = 1.2
Refl = 0
SWR=