HELP!!!! boat left me stranded!!!!!!

[lineman09]

hello everyone ... what a day ,,well got to the lake launched the boat and all is good . started heading out of the no wake zone and engine dies starts up kinda hard and i rev it up seem ok so i figured cold engine go another 100 yrds and dies again this time no restart. so i use my limited tools to check the fuel line at the carb and i have lots of fuel and the filter looks great, looked for loose wires and everything seems fine iam thinking ignition but iam not sure where to start i have 4.3l 2brl with a thunderbolt v ignition its a 2002 model with 239hrs on it seem to be useing oil but it doesnt smoke when running I NEED HELP ASAP wee have a trip planned for a month now for next weekend and it would be a bummer if we couldnt go so any help would be great

 

[tswiczko]

Re: HELP!!!! boat left me stranded!!!!!!

Have you checked for spark?
When was the last time you had it out?
Could be a lot of different things. If it hasn't been out in a while the gaskets in the carb could have dried out and are sucking air, moisture under the distributor cap etc.

 

[ktbarrentine]

Re: HELP!!!! boat left me stranded!!!!!!

Ok... so you say the filter "looks great"...how about the water separator? And how about the choke? Sounds like time for some basic fundamental 101 troubleshooting from the engine manual....

 

[maproy99]

Re: HELP!!!! boat left me stranded!!!!!!

Did it die when you tried to get on plane or did you not make it that far?

 

[LAC_STS]

Re: HELP!!!! boat left me stranded!!!!!!

Yea your manual should have basic troubleshooting steps in it.

If you have fuel you need to see If you have spark. Take the lead (spark plug wire) from the coil, or one of the spark plug wires off a plug, and ground it out on the block and see if you have spark. Might have to stick a screwdriver in there to ground it.

 

[ktbarrentine]

Re: HELP!!!! boat left me stranded!!!!!!

http://boatinfo.no/lib/mercruiser/manuals/mercruiser25.html#/74

Page 1C-9

 

[maproy99]

Re: HELP!!!! boat left me stranded!!!!!!

I'm thinking you might have ran low on oil or your oil filter is clogged and you have a low oil pressure kill switch that is activating. And how did your temps look? Say your impeller died (When was the last time you changed it and have you ever stated the engine out of water?) right about out the no wake is when your engine would over heat and possibly shut down again.

 

[LAC_STS]

Re: HELP!!!! boat left me stranded!!!!!!

I'm thinking you might have ran low on oil or your oil filter is clogged and you have a low oil pressure kill switch that is activating. And how did your temps look? Say your impeller died (When was the last time you changed it and have you ever stated the engine out of water?) right about out the no wake is when your engine would over heat and possibly shut down again.

Or the wire connectors on the switch came loose and ones is wiggling around.

That's what happened to me. Kept making the fuel pump cut off.

 

[lineman09]

Re: HELP!!!! boat left me stranded!!!!!!

sorry guys here is some more info.....the boat has been out lots of times this year had it out last friday everything was fine ran great..i checked the choke,, and the carb and it looked fine and is pumping fuel into the engine when throtled, even tried squiting a little gas down the carb still no fire .. i havnt checked the spark yet as it got late .... will check first thing in the morning .. it was low on oil but i filled it up, when i turn the engine over it builds oil presure.... took the fuel line off at the carb turned the engine over got lots off fuel. never got on plane broke down before i got that far, water temp was normal impeller is fine, this boat has been out numerious times this year ,this is the first time ive ever had problems with this boat ...is there a way to reset the low oil switch ???? will update spark test in the morning when i check it ... thanks a bunch

 

[dingdongs]

Re: HELP!!!! boat left me stranded!!!!!!

look on page 22 of 26 of guide and test; http://www.boatfix.com/merc/Servmanl/16/16B4R2.PDF

 

[joewithaboat]

Re: HELP!!!! boat left me stranded!!!!!!

Mine will do this if i overfill the fuel tank on the trailer. Once in the water the fuel shifts and covers the vent. The system cant breath runs like crap and dies often until fuel level drops a bit.
Just a thought.
Or your vent could actually be blocked.

 

[ktbarrentine]

Re: HELP!!!! boat left me stranded!!!!!!

look on page 22 of 26 of guide and test; http://www.boatfix.com/merc/Servmanl/16/16B4R2.PDF

Good info there... he's got a v-6, so he'll use the same TS instructions in manual 25, specific to his engine. (post #6)

 

[lineman09]

Re: HELP!!!! boat left me stranded!!!!!!

i even tried open fuel cap, no change

Mine will do this if i overfill the fuel tank on the trailer. Once in the water the fuel shifts and covers the vent. The system cant breath runs like crap and dies often until fuel level drops a bit.
Just a thought.
Or your vent could actually be blocked.

 

[lineman09]

Re: HELP!!!! boat left me stranded!!!!!!

ok, not getting any spark not sure where to go from here, but i think its the low oil kill switch not sure where to look i checked out the link that was sent and it talked about a knock senser , is this the same thing ??i will follow the TS for the knock senser and see what i can come up with... all help is much appreciated

 

[LAC_STS]

Re: HELP!!!! boat left me stranded!!!!!!

ok, not getting any spark not sure where to go from here, but i think its the low oil kill switch not sure where to look i checked out the link that was sent and it talked about a knock senser , is this the same thing ??i will follow the TS for the knock senser and see what i can come up with... all help is much appreciated

Ok. So the oil sensor kill switch if it were the problem would make the fuel pump cut off. You have fuel so its NOT the problem. you have an IGN prblem. When was the last time you serviced your IGN?

 

[lineman09]

Re: HELP!!!! boat left me stranded!!!!!!

when i turn the key on you can hear the fuel pump buzz for about 10 sec or so and shuts off, have not done any service on the ignition ive never had any problems i bought the boat in late MAY OF THIS YEAR and have putt about 60 hrs on it, just greese and oil changes will TS the ignite today and up date when done

Ok. So the oil sensor kill switch if it were the problem would make the fuel pump cut off. You have fuel so its NOT the problem. you have an IGN prblem. When was the last time you serviced your IGN?

 

[lineman09]

Re: HELP!!!! boat left me stranded!!!!!!

hello everyone... ok so here it goes after downloading TS link i went through the steps and i think i have a bad ignition sensor i used a volt meter and followed the steps in order and have found that i have spark at the green /white wire test so it says to replace ignition sensor .. will try to get one locally, if not ill order one online of from a dealer in oregon who will overnite it.. i ran the test several times and come up with the same results every time, so this is it i hope!!!!!! will update after i get new parts

 

[dingdongs]

Re: HELP!!!! boat left me stranded!!!!!!

heres one; http://www.ebay.co.uk/itm/200620804551?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649
may want to order a new cap and a rotor arm as you'll probably destroy the rotor as they're normally glued on and you have to get it off to replace the sensor.
glad the run through eliminated things.

 

[lineman09]

Re: HELP!!!! boat left me stranded!!!!!!

ok whats the best way to get the rotor off ???? its glued on or there is a screw iam not seeing, it does need changing will pick up rotor and cap when i get the senor on wednesday....

 

[dingdongs]

Re: HELP!!!! boat left me stranded!!!!!!

usually loctite from new.don't know why thats the reason for a new one.they are just damn tight thats why its best to have a new one to hand.there is no grub screw.