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Mark's Mailbag - Can I run deep divers behind leadcore?

Mark's Mailbag are occasional posts to the blog in response to questions people submit on the Fishing 411 website.  Mark personally responds to the question and when relevant, we repost his answer here.  If you have a question you would like to ask Mark, please visit us at

On June 8th, Dale wrote -  Hi. I troll with leadcore. Usually 3-7 colors in spring and then 7-10 in mid summer. I fish lake erie. I recently bought quite a few deep divers. Can I run these behind leadcore? I run about 15 ft of leader line.

Mark replied - Dale:
Thanks for writing. I’m also the founder of Precision Trolling Data, LLC, a company that has spent more than 20 years researching, testing and documenting the running depths of crankbaits, diving planers, trolling weights and also lead core line. In recent years we have done considerable work with
diving crankbaits in combination with lead core line. The findings are interesting and I think you would find them useful. Currently we have tested about a dozen different crankbaits on lead core lengths including 1, 2, 3, 4 and 5 color set ups using dacron lead core 18 pound test, with a 15’ leader of 10/4 Fireline. What we’re finding is that lead core does a good job of helping diving crankbaits reach substantially deeper depths. Our base line trolling speed is currently 2.0 MPH, but as time allows we will be expanding this data to include other popular trolling speeds.

This set up can be fished as a flat line or in combination with in-line planer boards like the popular Off Shore Tackle Side-Planer and the new SST Pro Magnum board.

This data is available for sale on both the Android and iPhone smart phone packages as the Precision Trolling Data, LLC App, available at the Google Play and Apple Stores respectively. Individual lure data sells for $1.99 per lure. Some of the baits we have tested to date with lead core include the Rapala Deep Husky Jerk No. 12, Berkley Flicker Minnow No. 7, Berkley Flicker Minnow No. 9, Rapala Shad Rap No. 7, Reef Runner 800 series and Storm Rattle Tot Original to name a few. We also sell the data in a package called the LifeTime version that costs $109.99 which includes all of the data we have currently published (over 600 dive curves) and as we publish new data these customers get this information at no additional cost for the life of the app.

We also have plans to expand this data to include 6, 7, 8, 9 and 10 color set ups.

Best fishes,

Mark Romanack