The best, most reliable inline are Carter, Carter or.....Carter. The only external pump that I am aware of that:
- has the fuel circulating through the elec motor section
- which lubes & cools the brgs
- because of the all-in-one casting [ between pump & elec section ] has NO seal to leak/wear out
- was on a daily driver for 19 yrs. Replaced, not because it failed, but because the owner thought it had earned it's 'retirement'.....
For up to 500 hp, use the #4594; over 500 hp use the #460X [ two models to choose from ]
- first released in 1969, design has not changed.
One of the biggest pump killers is putting HUGE pumps [ like 400 gph ] on an engine that only uses 50 gph.