help! new motor in boat and e fuel pump wont work!

qwe1qwe · Apr 29, 2006

just got boat back from shop -got new motor in with electric fuel pump- now the darn thing wont pump fuel. no power to the pump- ??? checked breakers- ok. is there a fuse on this? cant find one...shop closed today so no boating this weekend unless someone helps! this is a idmar motor put in a euro cruiser type boat - 350 merc motor was replaced with a motor that says "idmar".

Don S · Apr 29, 2006

Re: help! new motor in boat and e fuel pump wont work!

Look on the back of the engine by the relays. There is a 15A fuse inside item #2.

qwe1qwe · Apr 29, 2006

Re: help! new motor in boat and e fuel pump wont work!

thanks don- dont know if i can access it though...really tight..why would they put a critical item like a fuse way back there where it can strand you?

Bondo · Apr 29, 2006

Re: help! new motor in boat and e fuel pump wont work!

Is this Efuelpump wired thru an Oil Pressure Switch,..???... Did you Hot Wire the Fuelpump Directly,+ Test it that way,..??...

qwe1qwe · Apr 29, 2006

Re: help! new motor in boat and e fuel pump wont work!

don- this is a carb motor...there is no relays like your diagram...just the plug connect and reset button..i checked the oil pressure switch thinking no oil pressure means no power to the pump- so i cranked it till pressure came up and still no power...

qwe1qwe · Apr 29, 2006

Re: help! new motor in boat and e fuel pump wont work!

yes i hot wired pump..worked.

Don S · Apr 29, 2006

Re: help! new motor in boat and e fuel pump wont work!

i checked the oil pressure switch thinking no oil pressure means no power to the pump- so i cranked it till pressure came up and still no power...

First you need to know if there is an oil pressure switch that supplies power, or diodes in the charging circuit or how it's setup to run. Even if it had an oil pressure switch, the switch could be bad or a wire off or_______. I've worked on a couple of Indmar engines, but don't have any manuals or any other info on them. You might want to post the year, and model number, maybe someone will have one.

rodbolt · Apr 29, 2006

Re: help! new motor in boat and e fuel pump wont work!

you say indmar, was this a complete indmar 5.7 base package that comes with carb,fuel pump and an EST distributor ?

qwe1qwe · Apr 29, 2006

Re: help! new motor in boat and e fuel pump wont work!

yes. complete pkg...carb,fuel pump, and est dist...checked oil pressure wires, ok- fuel pump runs if hot wired, no power at f/p leads though...

qwe1qwe · Apr 29, 2006

Re: help! new motor in boat and e fuel pump wont work!

hurrah!!! got running...oil pressure switch! off to the lake! 85 degrees in sacramento!

rodbolt · Apr 29, 2006

Re: help! new motor in boat and e fuel pump wont work!

ok, that system comes partially pre-wired. depending on who finnished it is key. if done according to the USCG the pump only runs in two modes. one is cranking Via a wire from the R term on the starter to the oil pressure cut out switch mounted just below and on the port side of the dist. the wire from the pump goes to the same terminal as the wire from the R terminal to provide current during cranking. the other side of the switch is tied to the choke circuit to provide key on power only when oil pressure is present and the switch is closed. this prevents the pump from running with key on engine off. if its not wired that way it needs to be. they may have added a fuse but I dont think the base engine package had on in the harness. its something the installer is supposed to do. if its not fused the ign circuit needs a 20 amp fuse. I dont have my indmar book at home but I am a certified warrenty and installer for indmar. your pump should be a rotary carter mounted on a sheet metal bracket down low on the front stbd side of the motor.

Don S · Apr 29, 2006

Re: help! new motor in boat and e fuel pump wont work!

Check to see if you have power to the oil pressure switch, then crank the engine and check for power out of the switch when the oil pressure builds up? You're going to need a volt meter or testlight to do the tests.

rodbolt · Apr 29, 2006

Re: help! new motor in boat and e fuel pump wont work!

wow we were a few min late

anyway double check the ign timing, most are off some. the motor was shipped with the shunt tool, if ya did not get it with your instruction package ask for it.

Don S · Apr 29, 2006

Re: help! new motor in boat and e fuel pump wont work!

Why do I get this funny feeling he bypassed the switch. No mention of new switch and the wires were on before. So much for safety.

rodbolt · Apr 29, 2006

Re: help! new motor in boat and e fuel pump wont work!

who needs any safty? were boating. DonS had another one of those base packages, installed before I worked there, that blew the engine box off friday. tank leaks a bit due to a stripped screw in the tank sender, guy filled it up backed it down fired it off and booooom. engine quit and guess what, fuel pump did not. boat has a car starter,car altenator and no blower, has not had a blower in at least 6 years. I wont work on it personnaly for liability issues however the other techs will. one of the techs replaced the drive with a used SX thursday. motor was installed and incorrectly wired by the dealer, a year before I contracted for him, and has sunk about 3 times in the past 2 years. any time I get this crabbers work order I write up all the safty violations and refuse to work on it until they are corrected. so the other techs get it

whats funny is the guy called this morning asking about the safty things

luckily other than some wiring and power steering hoses and bilge pump hoses as well as the deck and engine box, no real damage occured and no human injury. however the kid running the boat took the rest of the day off

qwe1qwe · Apr 30, 2006

Re: help! new motor in boat and e fuel pump wont work!

ok- well thanks rodbolt- going to call installer on monday if they wired up the cranking wire to pump...anyway you got a wiring diagram for this? was wondering why though if you crank engine, oil pressure comes up - wont switch close and run pump?

Don S · Apr 30, 2006

Re: help! new motor in boat and e fuel pump wont work!

was wondering why though if you crank engine, oil pressure comes up - wont switch close and run pump?

Yes, if the switch works. But if the switch is bad it won't. You also have to have power to the switch when the ignition switch is in the run position for it to do anything once the switch closes.

rodbolt · Apr 30, 2006

Re: help! new motor in boat and e fuel pump wont work!

nope, its in my head, they dont offer wiring diagrams for that setup really. you have 2 terminals on the pressure awitch, on goes to the pump + feed the other will have a 12V ign feed on it usually tapped into the electric choke feed. on the terminal that has the pump feed it should also have a wire going to the R terminal on the starter motor solinoid. if wired correctly the pump runs when the engine is cranking then gets power through the pressure swith contacts during normal running, if for some reason the engine should stall or quit running oil pressure drops and the pump cuts off. if the stall was from say a leaking carb you really really may want the pump to cut off. its also part of the rules.

help! new motor in boat and e fuel pump wont work!

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