I find it VERY strange that you have SO MANY turns for a VHF antenna !!!!
That looks much more like a CB antenna (althrough a 8.2pF cap seems nore suited to a VHF aerial !!!)
What i suggest you is to replace everything with a J-pole antenna !
A single length of 300 ohm TV antenna twin-lead correctly cut and you'll have a working antenna (no capacitors).
**broken link removed**
The antenna shown is cut for the 146 MHz amateur radio band. For the marine band, try cutting the whole antenna at 50 3/8" instead of 54", the bottom right length at 1 1/8 rather than 1 1/4 (that solder point may move dependant of the SWR) and the next length cut at 14 1/4 rather than 15 1/4. The 1/4 inch gap remains the same.
Once the J-pole is built, simply slide it in the fiberglass radome, secure it in place by the coax and you're done !
Try it out ! It's cheap !
edit: The J-pole is an end-fed halfwave antenna. The bottom right 15 inch wire, along with it's corresponding length on the left conductor acts as am impedance transformer (an end-fed halfwave is a high impedance antenna and the transformer adapts this high impedance to 50 ohms) and the remaining length on the left conductor is the antenna itself.
I'm not sure about the top right unconnected portion of wire. Althrough it seems to have no effect on the antenna, being unconnected, it may help make the antenna sightly more broadband by being closely coupled to the left portion of wire (the antenna itself) and by this coupling, rising the effective diameter of the antenna. (A large diameter copper pipe is more broadband than a thin wire.)