Yesterday I picked up a 96 speedster and a perfect condition trailer from a family friend for free. The boat is a twin 717. The boat hasn't ran in 3 years and he said one engine wasn't running. So I did a compression check on all 4 cylinders with no throttle and got 125psi on all 4. I put new plugs in, added some fuel cleaner and new fuel, sprayed some started fluid in the cylinders. And both engines fired up. Now the battery is toast. It looks like it's got the single battery conversion but the problem is I can't get them damn thing out. It's a interstate srm-24. Any help would be appreciated.