how much water expelled from pump holes?

[rsw21282]

just ran my 85hp force and was wondering how much water is supposed to come out of the two holes in the back at idle kind of just spits out a heavy mist of water, when hooked up to the hose stream comes out exhaust and same when i put the hose up to the two holes, so my question is, is my impeller good? do i have enough water coming out? supposed to be a pair of streams or heavy spray type ok?

ryan

 

[Frank Acampora]

Re: how much water expelled from pump holes?

Because the water pump puts out less water at idle, and because the water exits through the exhaust and idle relief holes in the back, when on the hose and muffs, and at idle, usually a spray of water will exit these holes. On the water, much more cooling water is being delivered and USUALLY at cruising speeds a steady stream will exit these holes. However, at all speeds, the bulk of the water exits with the exhaust.

Scroll down and see my detailed explanation in the thread "Water bypass valve-where does the water go?"

 

[rsw21282]

Re: how much water expelled from pump holes?

hey frank thanks puts my mind at ease a bit, u wouldnt happen to know why when i start it it wont shut off now would ya? sound more like a ignition switch thing or power head thing?

 

[Frank Acampora]

Re: how much water expelled from pump holes?

Yep! I would know why it won't stop but I won't tell you! LOL

Actually, I was waiting on your other opost for you to give the year of the engine because I don't know the wire colors on later Mercury built Force engines.

However, If yours is an earlier Force say 1990 or earlier, or at least if it does not have mercury ignition then check this

The ignition systems on these engines (and on Mercury built ones too) Is completely separate from any other electical system and is self sustaining. As long as the flywheel is turning at cranking speed or faster, the ignition, which acts very much like a magneto, generates enough electical current to spark the plugs.

In order to stop the engine, you must do something. That something is to short the CD boxes to ground which (I believe) prevents the switching transistor from dumping the capacitor voltage into the coils. (at least, that is how I would do it if I were designing it.) No power to the coils, no spark, and the engine stops.

The stop circuit is the white and blue wire circuit. One white wire from each CD box connects to the white terminal near the starter motor on the engine. The white from the cable connects to this terminal also, so there should be three white wires connected there.

The cable connects to one "M" terminal on the ignition switch. The blue wire in the cable connects to the other "M" terminqal. The "M" terminals are normally open during running but are closed (connected) during stop.

The blue wire connects to the blue terminal on the engine terminal board. This is just above the black (ground) terminal. It should be jumped to the black terminal with a piece of bent sheet metal. Any break in the stop circuit will cause engine run on in the stop position.

Also, read the replies to your other post---apparently a loss of ground to the electronic mounting plate, while a different ground, will also cause this problem.

Merc. built Force engines are similar but wire colors are different and the wiring harness itself is different. Makes it a little more difficult to find the problem.

 

[rsw21282]

Re: how much water expelled from pump holes?

ok, ill check the wiring. I cleaned and remounted the grounds so they are good and while i have your ear i got another question, i took the boat out today ran it for the first time, id putts along fine and even with a bit of gas ok, however once i apply to much throttle(even slowly) it starts to sputter and die, my guess is the carbs need cleaned but im all ears for anything you want to throw my way.

 

[rsw21282]

Re: how much water expelled from pump holes?

and i cant find any plate on the eng. all it has is the numbers i posted stamped on the eng block, its all black and has the prestolite ign., 1pc lower unit other than that cant really tell ya any other info to widle down the yr possibilities

 

[MostlyHrmlss]

Re: how much water expelled from pump holes?

I have two 85hp's, a 1978 and a 1985. They both had plates mounted inside the lower cowling with model and serial numbers. The '78 behaved exactly as you described, happy at idle and low throttle, but coughing to death at wider throttle settings. I pulled off the exhaust plate and noticed a big chunk missing from the #1 piston, right under the rings. I assumed this to be the problem.