adventuris

hi , have a boat with a 3126 looking to get more power , is there aftermarked injectors out there , can the pump be turned up , or bigger turbo put on .

1-5-3-6-2-4

is it electronic? whats your current power rating. IIRC the top factory 3126 rating is 350hp-880ft/lbs

adventuris

its a marine motor rated at 420 at 2800 , its mechancial

wannadiesel

If it's mechanical it must be a 3116.

1-5-3-6-2-4

and I'm thinking of onroad ratings.

adventuris

its a marine motor , and it is a mechancial 3126 , not a 3116 .

nevrenufhp

It may not survive too long if it's pushed any more. In any case, they should be the same as a 3116:
To gain access to the fuel screw on the 3116, you must remove the valve cover. If the seal tag/plate is still present it will need to be removed. You will need to remove the tag by removing the rocker shaft stand bolt. The screw and lock nut are on the rack bar. Turn the screw counter-clockwise to increase rack travel. One source says you'll need some special tool to do it, I have yet to verify.

adventuris

hi , thank you for the info on fuel screw , do you know it there are different injectors out there to get more , or can they be honed out .

nevrenufhp

Most any injector can be extrude honed. You could also send a PM to DonM and see if he can make you some EDM ones. For reference, click on the link in my signature...there's a few more engines listed.