stops and starts.

Went sailing today Jo's tug was fine but my sub chaser would run for a few seconds then stop for a few operating the rudder made it worse the batteries were all charged a few days ago it hasn't been used since February and all was ok then.
Any ideas welcome?

Sounds like it could be a loose electrical connection, interrupting the power. If the wires are moving when on the water that could explain it...

You might be right Barry after posting this I unload the trailor and put the batteries back in and it ran perfectly.
At the lake we took turns with the seaport tug for 20mins until a wind change turned beautiful clean water in to a weed clogged mess in 5 minutes at least I know not to bother when it's blowing from the west.

Here we go again checked the electrics yesterday headed to the lake set her up turned on and took a 50metre walk to check range everything perfect, placed her in the water & returned to the transmitter upon applying power it moved about a metre and stopped I was able to catch it with the Tx antenna back in it's cradle on land the damn thing worked fine.
Perhaps I'll try a different Radio gear.

meanwhile Jo got about 20mins great sailing before her tug got a kort full of green weed, fortunately last week I made a 3 prong hook for the mini collapsible rod and reel I bought some time ago for retrieval purposes.