Frequently Asked Questions
Q: Is 750 CFM too much for my 350?
A: Yes — 750 CFM is over-carbureted for a small block 350. For 305-350 marine engines, use the 1409 (600 CFM) instead. The 1410 is designed for big block applications 396 cubic inches and larger.
Q: Can I use this on a Mercruiser 7.4L Bravo?
A: Yes, the 1410 is an excellent upgrade for the Mercruiser 7.4L (454) when paired with a square bore intake manifold. Verify your intake flange type before ordering.
Q: What fuel line size is needed?
A: We recommend 3/8" minimum marine-rated fuel line for 750 CFM applications. For engines above 500 HP, use 1/2" fuel line with a high-volume marine fuel pump.
Q: What's the expected fuel consumption at cruise?
A: Fuel consumption depends on engine load, hull type, and cruise RPM. The 1410's air valve secondary design helps maintain reasonable fuel economy at part-throttle cruise because the secondary barrels only open under high demand.
Q: Does this include a flame arrestor?
A: A flame arrestor is not included and must be used. All marine inboard engines require a USCG-approved flame arrestor. The 1410 accepts standard 5-1/8" neck flame arrestors.