Yes, they made a B-275 gas model, that uses the BC-144 engine. And I'm not sure how I assumed he has a gas model, and still not sure, since there has been no reply.
But to go a bit further with my problem, it was not just the points burned on mine, as it did the same thing the next day. Come to find out, the threads where the wire from the pos. side of the coil attaches, were tarnished. Not really corroded, just a bit of green tarnish on the brass threads, kept it from making a good connection.
Started fine the next day, and ran for 15-20 minutes just fine. I shut it off, and it sat for maybe 20 minutes while I loaded the manure spreader. Got back on to spread the load, and would not start. Did a quick check with a test light, and found no current out of the coil, to dist. Figuring the coil was bad, was taking it off to match one at the parts store, when I saw the tarnish. Brushed it off, then re-tested, and had current. Put a dab of dielectric grease on it, and have been back in business ever since. I LOVE an E-Z fix..!!