110 evinrude water circulation

[onemorecast2]

New water pump installed. Works fine at idle and low rpms. NO WATER PUMPING at high speeds , check streamstill working. Any ideas ?

 

[HighTrim]

Re: 110 evinrude water circulation

Welcome to iboats.

Kinda confused by your statement, although that is not too difficult.

You stated "not pumping at high speeds", although "check streamstill working". Are you stating that the tell tale is still pumping water, yet it is overheating?

Are you getting an over heat alarm?

 

[onemorecast2]

Re: 110 evinrude water circulation

Chris tell-tale works at low speed. water or spray can be seen at rear of motor. at high speed no water or spray. motor warm and shut down. no heat alarm. that is the next thing i will check.

 

[ezeke]

Re: 110 evinrude water circulation

I thought all of the 110HP motors had a tell-tale which should discharge on the starboard side of the lower cowl. What is happening there?

The tell-tale outlet is only 1/8 id and easily clogged. You should be able to keep your fingers on the cylinder heads for a full three count whenever the engine is running.

A tell-tale can only indicate that the water pump is functional. It tells you zip about the flow through the cooling passages of the engine.

 

[emdsapmgr]

Re: 110 evinrude water circulation

If the thermostats are working, it should idle all day and not overheat. If the thermostat pressure relief valves do not open, it will probably overheat at planing speeds due to insufficient water flow through the block. At planing speeds, there should be large streams of water exiting the two exhaust relief ports on the upper midsection. Have you had the thermostat housing apart?

 

[onemorecast2]

Re: 110 evinrude water circulation

tell tail working fine at all times. moter has water and spray from relief ports at low speeds - none at high speeds. Always has on all motors i've had.

 

[onemorecast2]

Re: 110 evinrude water circulation

Motor will idle & run at low speed all day and stay cool. relief ports have water and spray at low speed None at higher . always has before . will check thermostot relief. thanks

 

[onemorecast2]

Re: 110 evinrude water circulation

tell tail working fine at all times. moter has water and spray from relief ports at low speeds - none at high speeds. Always has on all motors i've had.

 

[emdsapmgr]

Re: 110 evinrude water circulation

The telltale only shows water pressure to the block-not flow through the block. If the thermostat housing is not working properly it can block (prevent) water from leaving the block, and you will overheat. You need to get into the thermostat housing. Check the pressure relief valves and the thermostats. Also, the two pinholes in the valve body must be clear (open).

 

[Chinewalker]

Re: 110 evinrude water circulation

Okay, you say you just installed a new waterpump kit. I did the same on my 90hp Johnson (same lower unit & pump) two years ago and it nearly melted down first time out. Mine, too, would pump like normal at low speed and idle. BUT, as soon as I would plane off and the water pulled away from the transom, I would lose the telltale and no water out the reliefs. Took me a good week of head scratching before my local mech asked me how I had assembled the pump housing. Apparently, if you are a bit too generous with the sealing goo when installing the thin o-ring that goes between the top of the SST cup and the plastic pump housing you can plug off a tiny vent hole. I pulled it all apart and sure enough, I had globbed the sealant in there just enough that it had plugged up the little channel in the housing. This vent is required so that the pump holds its prime. I cleaned it up, reassembled it and haven't had any more issues with it since...

To further clarify - the vent channel is about a 1/4-inch long, running horizontally under the top of the plastic housing. It goes right through and is perpendicular to the channel that the thin o-ring seal seats in. It has to be open and even is mentioned in the OEM service manual. Being that I have done hundreds of waterpumps over the years, I never once thought to actually read the manual, but I learned that lesson the hard way...

- Scott

 

[onemorecast2]

Re: 110 evinrude water circulation

Thanks for the help. This all started when the trim tilt motor failed.I picked up a new one to put on, no way it could be installed with boat in the water. (can,t reach transom screws with motor on boat) That was a problem since barge - crane lifts the boat in & out , spring & fall (no trailer ).So the repair shop got the job and transport. The shop suggested they replace the water pump also ,it's been a few years since i changed it "OK do it lets get this thing running again". Engine tilis up & down fine -water circulation fighting me now. Yesterday at 4500 rpm engine shut down as if i pulled the safety key, motor was hot, waited an hour started drove home. Today tested again , heat alarm sounded shut down (water was still showing from tell tail but not the relief ports before alarm) waited awile ,started and took that slow idle ride home. Looks like back to the shop -remove gearcase - check pump - replace thermostats . THANK YOU