"Get that checked because batteries are critical ... you can't push start a boat."
Mr van Tuel said coastguard carried out routine boat checks for owners but mechanical checks needed to be carried out by marine engine specialists.
"There are several around here people can go to."
The coastguard were quickly on the scene of Sunday's call-out after getting the call about 3pm as a crew was preparing to begin a training exercise.
"So they were ready to go."
Conditions were relatively calm and and the boat and crew were in no danger, Mr van Tuel said. "Pretty straight forward."
After a line was attached to the boat it was towed back to the inner harbour where the owner had launched it from.
Mr van Tuel said assisting boats with mechanical problems was top of the volunteer rescue service's list.
Since the specialist rescue response boat Celia Knowles was launched four years ago it had logged nearly 100 call-outs for towing assistance.
Coastguard responded to 32 calls last season (to the end of June) to help vessels which had broken down.
It also responded to 20 police 111 calls and assisted a total of 62 people.