Which one should I buy?? I have twin 454 magnums gen IV, all stock, and need to get new fuel pumps. There are a lot of them out there and I cannot find any guidance in the post on which ones are better than others. Not looking for bling, just reliability. Adding to my confusion is the number of used fuel pumps listed on here for sale. In my simple mind, the fuel pumps do not cost that much so is there a reason I should look at a used unit for my application?? Thanks

Make sure that whatever you get, it's marine rated an has a vent line that runs to your flame arrestor. If I had a GEN IV I would have used a Stewart pump, much more reliable.

I know jegs and summit both sell these?? Little pricey but look like good quality and can also run e-85. So race fuels won't hurt it!
http://m.summitracing.com/parts/rpu-1600

Edit-- I also rebuilt my 6valve- edelbrock race mech. Fuel pump. Worked out very well and cheaper than new plus the knowledge of doing it! But Marine rated is a +

I always ran one of the Holley 110 GPH marine models on my old Mk IV motor. Should also fit Gen VI - same mounting boss. To be honest, you can take the fitting off of one of the marine units and press it right into the weep hole on an automotive unit. That is the ONLY difference. The only other concern might be having a part number that says marine on it in case of an insurance claim, but I don't know if they would ever dig that far other than to see that it has the marine rated return line back to the carb.

Get these and you will be fine.


http://m.summitracing.com/parts/hly-712-454-11

I keep getting holly over and over again so holly it is. Thanks gents!

Whats wrong with using a stock carter pump? Your current fittings and lines thread right in (if still all stock). OE Carter pump, avail at napa, 81.99ea

http://m.napaonline.com/Tablet/parts...601_0384673033

Agreed what's wrong with a stock pump? You have stock motors etc so why not use what Mercury used?

I don't know - that is why I am asking? $30
More for the holly - is it worth it?

No. 30x2 =60 bucks. Plus I believe the merc setup uses 1/4'' NPT fittings. To use the holleys with 3/8NPT, then you'll need some bushing fittings, so prob another 20-30 bucks.

Now, if you thought down the road you'd be adding blowers, or something, i'd go straight to a six valve pump with 1/2NPT ports.