2002 90HP Overheating at low RPM

[panasonic]

Thanks Scott...I do not know what I am doing wrong wit the pictures...will figure that out later.

I wanted to tell the OP to look at items #1,2,3,4,14, 15 11 and 10. Make sure all are there.

[TownsendsFJR1300]

Why are my pics so small???????^&&*%$%^$#^&^

Mines Bigger!

[panasonic]

Why are my pics so small???????^&&*%$%^$#^&^

[panasonic]

[panasonic]

What do the two stroke guys think about the oil? Different issue?

Yes a guy a while ago had same problem...missing seal on water pipe. I wonder if that little damper seal is also missing, allowing exhaust to come around the water pump and getting mixed in with all the leaking water that is supposed to be going up the pipe to the engine???

[TownsendsFJR1300]

What do the two stroke guys think about the oil? Different issue?

Well, that small drip must be coming from the power head lower cowl...

Sounds like a small oil leak somewhere finally made it south...

[pstephens46]

What do the two stroke guys think about the oil? Different issue?

[TownsendsFJR1300]

I don't think water should be coming out of there while running. Wasn't there another OP recently with this observation? There may be a problem where the tube connects to the pump. The rubber grommet/seal. Now that I look again, seems to be more 2 stroke oil than what might be "normal" in the first pic.

Yep, wasn't long ago, exact same thing.

Turned out the seal was missing (I believe) at the top of the water tube (as I re-call, closer to the powerhead)..

[walleye1]

I have found in the past most yamaha's will over heat if the exaust ports arn't covered with water.

[pstephens46]

I don't think water should be coming out of there while running. Wasn't there another OP recently with this observation? There may be a problem where the tube connects to the pump. The rubber grommet/seal. Now that I look again, seems to be more 2 stroke oil than what might be "normal" in the first pic.

[nowakezone]

I did some more troubleshoot this morning. I ran the motor with the double muffs on and lowered the idle back down to under 1000 RPM. It did not set off the overheat alarm after about 8 minutes but it was definitely hotter to the touch on the head than when the RPM was higher.

I looked all around the engine and as far as I can see there was no water leaking under the cowling anywhere. BUT I noticed that water was coming out of a place on the lower unit that I am not sure it is supposed to. It's on the steering pivot pin part of the lower unit. This only occurred with the engine on the muffs. When I attached a garden hose to the flushing connection, no water came out of that point.IMG_20180123_110855688_HDR.jpg
IMG_20180123_111421410.jpg

I am pulling the lower unit later this week. Please let me know if water is not supposed to exit at that point!

By the way - the friend seems sharp - but we will see

[boscoe99]

do Navy ship engineers design stuff or just work to keep the go system running properly on Navy ships?

Mokaniks seem to have been elevated to "technicians". Pay is the same but they get to feel better.

Like your garbage man now being referred to as a "sanitation engineer".

[boscoe99]

What we here in the USA call mokaniks the Brits across the pond call engineers.

Now what we here in the states think of engineers are the folks that sit at their desks with slide rules and such designing parts. Or calculating stress levels and such. Paper pushers if you will.

I am not sure if it is really true or not but a British engineer (the design man) told me that over there all wannabe design engineers have to spend time working on stuff in shops. So they will have an appreciation of what a mokanik has to go through working on parts that the design man created. The design man will hopefully feel some pity for what the mokanik has to deal with and design a more user friendly way of putting an assembly together.

Back in the day when I was a mokanik I had to remove a boot strap air turbine from an aeroplane. It was a sumbitch. I thought if the design man had placed the access hole over one inch towards the turbine, or placed the turbine one inch towards the access hole, it would have been a snap. But no! I don't think the design man gave a rats arse about the po mokanik.

[99yam40]

do Navy ship engineers design stuff or just work to keep the go system running properly on Navy ships?

[rodbolt17]

how many of these mokanicks had school/training certs on the wall???

last thing you wish to do is consult an anganeer.
the reason the design stuff is cause they cant fix stuff.
the anganeer work has long been done and proven.
you do not need to redisign it it simply needs to be correctly diagnosed and repaired.