|
| Mercury EFI 150 - Intermitten Overhea... |
| Author |
Message |
    
Jeff Zakrzewski
New member
Username: misterbass
Post Number: 1
Registered: 06-2008
| | Posted on Monday, June 09, 2008 - 12:33 pm: | 
|
I own a 2002 EFI 150 Merc and runit on a Skeeter 186 bassboat. I purchased the boat/motor new in 02' and for the past three seasons I have been experiencing the overheat alarm sounding off intermittenly. In the beginning it would only happen during hole shots, but after $2,000 in repairs replacing the waterpump, thermostats, sensors, alternator, ignition, and lower unit flushed I am still having an issue. Now the alrm sounds off various times while on the water to include after running it for a while and bringing it into the dock it sounds off at idle and wont stop unless I turn the motor off. After three boat shops working on it, one in which was a "Master Marine" mechanic and $2,000 later it's still not fixed. Any good expereinced Merc technicians with advice on where to go from here is greatly appreciated!!!! Thanks in advance. |
'Bandit
Advanced Member
Username: timebandit
Post Number: 365
Registered: 09-2007
| | Posted on Tuesday, June 10, 2008 - 09:28 pm: |
|
Poppit valve? |
Jeff Zakrzewski
New member
Username: misterbass
Post Number: 2
Registered: 06-2008
| | Posted on Saturday, June 14, 2008 - 01:16 am: |
|
Thanks for your reply! They didnt change the Poppit valve and not sure if they even looked at it. What function does that do??? |
Dale W. Clark
Member
Username: dale_c
Post Number: 13
Registered: 05-2008
| | Posted on Saturday, June 14, 2008 - 04:56 am: |
|
I am not an expert Jeff, but I believe it helps maintain water pressure at higher rpms. They have rebuild kits for them, ( I think I may need one too). Is there any chance the motor is too high ( jack plate) or trimmed up too much during running. Also check your speedometer pick-up and transducers to see if they are diverting water from the lower unit. Just a guess. I would, and I did, put a temp gauge and water pressure gauge on the motor, never hurts to know what happening while your running and they are cheaper than a motor. |
Graham Lamb
Senior Member
Username: galamb
Post Number: 3382
Registered: 05-2007
| | Posted on Saturday, June 14, 2008 - 03:30 pm: |
|
Jeff, at about 1500 rpms and below the water pressure in the head is usually somewhere between about 4 and 9 psi.
At that point the cooling for the motor is the job of the thermostats.
Above 1500 rpms pressure from the waterpump increases and the thermostats are pretty much bypassed. The poppet valve works to control how fast the cooling water passes through the motor.
They function until the water pressure exceeds 12 psi (or there abouts) at which point water is basically pumping through as quick as it can to keep the powerhead cooled.
A heat alarm at idle is usually the thermostats - upwards to almost full throttle, the poppet - at wide open - bad impeller, blockage, build-up etc....
As always, it could be a bad sensor as well. They are built fairly cheap and work on simple resistance... |
|
|
|
Product Categories |
| Engine Parts · By Brand |
| Engine Manuals · By Brand |
| Books |
| General Repair and Maint. |
| Care and Repair |
| · Adhesive and Sealants |
| · Bottom Cleaners |
| · Cleaners Wax and Polish |
| · Mops Brushes and Sponges |
| Covers and Tops |
| · Bimini Tops · Hardware |
| · Cover Accessories |
| · Motor Covers |
| · Universal Boat Covers |
| Electronics |
| · Gauges and Compasses |
| · Mounts and Accessories |
| Electrical |
| · Batteries & Chargers |
| · Battery Accessories |
| · Dockside Electrical |
| · Electrical Terminals |
| · Electrical Wire, Cable |
| · Fuses, Fuse Holders |
| · Switches |
| · Wire Ties, Clips, Tape |
| Fuel Systems |
| · Fuel Tanks |
| · Fittings, Fills, Vents |
| · Hose & Primer Bulbs |
| · Filters, Senders, Caps |
| Hardware |
| · Deck Cabin Hardware |
| · Molding and Rub Rails |
| · Rails and Fittings |
| · Snaps Shackles and Hooks |
| · Windshield Hardware |
| Lighting |
| · Cabin Lights · Light Bulbs |
| · Navigation Light Parts |
| · Navigation Lights |
| · Spotlights · Parts |
| Mooring and Dock |
| · Boat Fenders · Boat Hooks |
| · Buoys and Markers |
| · Deck Cleats · Dock Edging |
| · Dock Parts and De-Icers |
| · Fender Covers and Holders |
| · Keelshield / Toon-Tectors |
| · Ladders and Platforms |
| Prop / Trim /
Transom |
| · Jack Plates, Wedges |
| · Mounting Brackets |
| · Outboard Stands |
| · Trim Tabs, Stablizers |
| · Prop Nuts, Locks, Pins |
| · Propellers · Wrenches |
| Pumps |
| · Aerator Pumps |
| · Bilge Pumps |
| · Drain Plugs and Tubes |
| · Hose · Through Hull Fittings |
| Rope and Cordage |
| · Anchor Line · Dock Line |
| · Fender Line · Bulk Rope |
| · Shock Cord and Bungee |
| Safety Products |
| · Horns Bells and Whistles |
| · Mirrors |
| · Vents Blowers and Hose |
| Sanitation |
| · Fresh Water Pumps |
| · Marine Toilets |
| · Sanitation Chemicals |
| · Sanitation Pumps/Hose |
| · Water/Waste System Parts |
| Seating |
| · Deck Chairs and Tables |
| · Fishing Seats |
| · Lounge Seats |
| · Pontoon Furniture |
| · Seat Bases and Pedestals |
| Steering / Control |
| · Control
Boxes |
| · Control
Cables |
| · Hydraulic
Steering |
| · Mechanical
Steering |
| · Rigging · Steering
Wheels |
| Tools / Shop Supplies |
| · Lubricants & Additives |
| · Motor Flushers |
| · Tools & Test Equipment |
| Trailering |
| · Boat Guides/Motor Support |
| · Hitches Balls Couplers |
| · Rollers Brackets Springs |
| · Tires Wheels and Carriers |
| · Trailer Hubs & Bearings |
| · Trailer Jacks |
| · Trailer Wiring and Lighting |
| · Winches Straps Tie Downs |
| Manufacturer List |
|
