oh yea, the aetnas might be the best upgrade available. I put them in the weekend we bought the boat. EGT and boost are a close second in my opinion
Official Caterpillar3116/3126 Thread
- Thread starter carterchapman
- Start date
oh yea, the aetnas might be the best upgrade available. I put them in the weekend we bought the boat. EGT and boost are a close second in my opinion
Saverio
Well-Known Member
- Aug 31, 2010
- 1,506
- Boat Info
- 1995 450 DA
- Engines
- Cat 3126 420hp
900 hours Westerbeek Generator
On two occasions now my port engine just clicked. Both times I go to the back of the motor by the control box. press in the circuit breakers. they aren't tripped. but the boat will then start. is that the symptom for the relay is going.
Riptide III
3D
- Dec 8, 2007
- 1,139
- Boat Info
- 1997 Sea Ray 400DA
Cat 3116 TA
1994 Sea Ray Laguna CC 250 Tohatsu
- Engines
- :
Sometimes I push the the start button to the start position and it just clicks. I release the button then push again and it starts. Is that the same think yours is doing?
Saverio
Well-Known Member
- Aug 31, 2010
- 1,506
- Boat Info
- 1995 450 DA
- Engines
- Cat 3126 420hp
900 hours Westerbeek Generator
Just a solid click. when I try it again same results. I use the emergency start but it doesn't change anything
- Jun 5, 2016
- 5,614
- Boat Info
- 410 Sundancer
2001
12" Axiom and 9" Axiom+ MFD
- Engines
- Cat 3126 V-Drives
Could be an issue with the start switch? They are OFF ON (ON) maybe an issue with that momentary portion of the switch?
Riptide III
3D
- Dec 8, 2007
- 1,139
- Boat Info
- 1997 Sea Ray 400DA
Cat 3116 TA
1994 Sea Ray Laguna CC 250 Tohatsu
- Engines
- :
+1. I have been thinking that might be it. Intermittent problem right now for me. Too many other things that need attention. I am interested in hearing what ur fix is.
- Jun 5, 2016
- 5,614
- Boat Info
- 410 Sundancer
2001
12" Axiom and 9" Axiom+ MFD
- Engines
- Cat 3126 V-Drives
Pull the switch panel, and swap the start switches to see if problem follows. If so, buy 2 new switch bodies and swap them out. It’s probably a 45 minute job.
Njlarry
Well-Known Member
Engine dies then won't restart.
Only ten minutes after refueling started to go on plane, on engine sync, engines got to about 2500 rpm then suddenly felt like we were dragging something, pulled throttles back and shifted to neutral. In panic I may have shifted too quickly out of grear. Also believe I shut off both engines. It happened so quickly we will never know. Anyway the port engine started right up. Starboard cranked quickly but would not restart. Got back to slip and:
Switched supply tanks
Changed racor fuel selection
Replace run relay in box top of engine.
Still cranks but no start.
Any suggestions most appreciated!
Only ten minutes after refueling started to go on plane, on engine sync, engines got to about 2500 rpm then suddenly felt like we were dragging something, pulled throttles back and shifted to neutral. In panic I may have shifted too quickly out of grear. Also believe I shut off both engines. It happened so quickly we will never know. Anyway the port engine started right up. Starboard cranked quickly but would not restart. Got back to slip and:
Switched supply tanks
Changed racor fuel selection
Replace run relay in box top of engine.
Still cranks but no start.
Any suggestions most appreciated!
any stumble or signs of it trying to fire? Maybe you somehow have air in there. I’d pump the primer a bunch and listen for fuel returning to the tank to be sure it’s all clear of air.
also I think you’re ok having pulled out of gear early, it’s the shift back into forward at high RPMs that does the real damage as the plates heat up and warp.
Njlarry
Well-Known Member
No sign of stumble. Turns over normally but never fires up. Wondering if its the fuel selinoid that shuts down the engine?
- Jun 5, 2016
- 5,614
- Boat Info
- 410 Sundancer
2001
12" Axiom and 9" Axiom+ MFD
- Engines
- Cat 3126 V-Drives
^^^This^^^
You should here the solenoid "clunk" when star button to the run position.
Do you here this?
Njlarry
Well-Known Member
Stand by, will check
Njlarry
Well-Known Member
Could not hear a clunk but starter is so loud could easily miss it.
you should hear it without trying to start it. Happens when we click over to run and let the intake heaters go
Njlarry
Well-Known Member
I think I understand but we are set up with press to start then release switch. Don't have a real start run switch. Have a nearby mechanic to look at it tomorrow am. My selenoid has only two terminals not three like my cat manuel shows. How is it tested with a multimeter and diagnosed? Any temporary work around if either the run side or stop side is out?
- Jun 5, 2016
- 5,614
- Boat Info
- 410 Sundancer
2001
12" Axiom and 9" Axiom+ MFD
- Engines
- Cat 3126 V-Drives
When you go from the OFF position to the ON/RUN (middle position of the switch) you should hear a definite solid "clunk" The next position is the start position the momentary position to start.
My money is on the fuel solenoid
Where can I get a pair of fuel supply hoses made? Unfortunately, when the starboard Caterpillar 3116 engine was rebuilt, they removed the two hoses shown in the picture (port engine shown) and lost them.
The one hose is shown with an orange trace and the other yellow.
The one hose is shown with an orange trace and the other yellow.
techmitch
Well-Known Member
- May 1, 2008
- 8,418
- Boat Info
- 1999 270 DA
- Engines
- Twin 4.3s W/Alpa I Gen II's
I wouldn't expect these guy's to have them but I would bet big they would have a good lead for you.
Not to far from you either.
https://www.foleyinc.com/parts/
Any hydraulic hose shop can make them up.
techmitch
Well-Known Member
- May 1, 2008
- 8,418
- Boat Info
- 1999 270 DA
- Engines
- Twin 4.3s W/Alpa I Gen II's
Yea, Tom is right, again,... just change the zip code and scroll to the map.
https://www.google.com/search?q=hyd...7j33i160l2.12776j0j7&sourceid=chrome&ie=UTF-8
