6 HP 1990 evinrude

[marvxyz1]

I have a 6 HP evinrude 1990, and I'm getting some water from the tube running from the motor which is comming out cold when the motor is run.The water coming from the exhaust is warm. is this correct? The exhaust water is coming out as a spray, so do you think need a new waterpump? I've checked iboats and they don't seem to have a waterpump for this motor.

 

[Vic.S]

Re: 6 HP 1990 evinrude

You should get a good jet of water from the tell-tale in the rear corner of the lower cover.
If not check that it is not blocked, check that the hose is clear and that the fitting at the engine end is also clear (be careful that's only plastic and not very strong. (Blow air up it from an air line if you can)

It should get pleasantly warm.

You should get a little water from the cover over the exhaust back pressure relief port at the top of the back of the leg. A spray or a few droplets along with exhaust gas. It will be a lot warmer than the above telltale stream.... hot even. But you should not get a lot of steam from there.

The bulk of the cooling water leaves via the main exhaust outlet under water behind the propeller where you wont see it.

If you don't see steam and you can touch the cylinder head briefly all will be well.
If a splash of water on the cylinder head sizzles or if you are followed by a distinct cloud of steam from the relief port it is overheating and a water-pump impeller replacement is probably called for. Part number 0389576. You will probably also need the two gaskets 0325040

There is also a complete pump overhaul kit if required. 0396644

Sierra part no 18-3091 is the impeller but I don't see a number for a kit

See http://shop2.evinrude.com/Index.aspx?s1=b69c288528726827ebb9c0a376bae610&catalog_id=0&siteid=1 for a complete parts list and diagrams

 

[BigB9000]

Re: 6 HP 1990 evinrude

get the BRP kit

impeller kit:

436137

complete kit w/o housing
396644

 

[marvxyz1]

Re: 6 HP 1990 evinrude

Thanks fellows, I was having a problem with not finding a kit for my waterpump.and it's good to know that my motor is operating proply, except for the cold water coming from the top hose.. Thanks again marvxyz1

 

[Vic.S]

Re: 6 HP 1990 evinrude

It might be an idea to check the themostat although the telltale is before it so is basically almost cold water.
Don't bother though if the engine seems to reach a decent running temp. If you can touch the block and keep your finger on there then I reckon the thermostat may be stuck open.

 

[marvxyz1]

Re: 6 HP 1990 evinrude

If the thermo is stuck open will that affect engine performance in any large way?? I have trouble with the engine holding an idle at slower speed.

 

[Vic.S]

Re: 6 HP 1990 evinrude

it will, it must do but I bet you'd never notice it.

What do you mean by "holding an idle at slow speed" do you mean if you try to run at slow speed... sort fast ilde speed... it keeps slowing down and you have to keep readjusting the throttle?

 

[marvxyz1]

Re: 6 HP 1990 evinrude

At higher speed the motor will idle fine , but if I try to tone the idle down a little the motor wil stall.

 

[Vic.S]

Re: 6 HP 1990 evinrude

Idle mixture out of adjustment ?

Carb needs cleaning?

 

[marvxyz1]

Re: 6 HP 1990 evinrude

Will check those two items, also could timing be an issue causing the idle problem??