Champion jumper Bashboy is being shaded for favouritism in early betting for the Grand National Steeplechase at Ballarat.

Bashboy is aiming for a record third Grand National win after successes in 2012 and 2013.

He has 74.5kg in Sunday's $250,000 race over 4500m, the same weight he carried last year when he finished second to Wells who had 9kg less.

Bashboy headlines a field of 10 but it is last year's Grand National Hurdle winner Sea King who has been installed the $3.20 TAB Fixed Odds favourite with Bashboy at $3.40.

This season's Grand National Hurdle winner King Of Dudes is $3.80.

The Ciaron Maher-trained Bashboy has won two of his three jumps starts this season, taking out the Thackeray Steeplechase at Warrnambool in June before a last-start victory in the Crisp Steeplechase which he won for the fourth straight year.

Sea King finished second to Bashboy in the Crisp and meets the topweight 2.5kg better on Sunday.

The Ballarat meeting, which was transferred from Sandown, is the final metropolitan meeting of the season in Victoria.

The track was rated a heavy 10 on Thursday.