The water pump impeller is the cause of most water. God only knows how long the little guy ran back there. What to Do When Water Isnt Circulating Through the Outboard Motor 1) Check the Water Pump Impeller. Impeller? Just fine (although it had run in a lake 12 hours earlier). I replaced the fuse, changed the oil and it is still working fine 15 years later. But as luck has it, the little 4-stroke Yamaha 9.9 has a fuse that eventually blows on overheat. Running with the motor trimmed up in the shallows. It had been running while I was trailering!I thought for sure it was siezed.a $2500 mistake. Boat Motor Muffs Outboard Motor Muffs and Inboard I/O Ear Flusher Motor Flush Warmer Parts Hose Adapter Boat Muffs Outboard Engine Flush Marine Use Kit Boat Accessories Winterizing Flushing & Warming. If you run aground, immediately shut off the motor, get out and drag your boat back into deeper water. Then I noticed the canvas and tape around the cowl had caused the electric start button to engage when the motor turned sharply on the transom. Found nothing except that I forgot to kill the main Perko switch. I about burned my hand on the lower was extremely HOT! Stunned and confused I began looking for an electrical short or something. I noticed the 9.9 had turned completely to the right so I grabbed it to straighten it back out.

Although you shouldn’t run your engine without water, that doesn’t mean you can’t.

Without water to cool off and lubricate, the impeller will heat up super fast and possibly damage. You wont pick up stuff like this off the. Most outboard and inboard engines use impellers (rubber pumps) to run water to the boat’s cooling system. Keep the pump somewhat wet for some lubrication and the water flowing through the motor and you should be just fine. Stopped the truck for fuel and checked everything over. Starting a boat without water is not recommended. That one brings back a memory, and a true story.I was trailering over some rough dirt road with an electric start Yamaha 9.9 troller all wrapped up in canvas and duct tape behind my 20' aluminum. Re: **** I accidentally fired up my engine without water!!!! ****

Running inboard motor out of water