2005 F150TXRD, clogged side water discharge hose

[josesirven]

I was looking at the parts breakdown online, and I noticed if I removed the two large bolts, poppet valve, thermostat, anode, and the rectifier it would give me a lot of access to clean out with water pressure and not have to remove the exhaust cover. What do you think? When I remove the the rectifier will this give me an opening that I can squirt pressurized water through?

Thank you,
Jose Sirven

[fairdeal]

remove the rectifier - ahh - brilliant.

I don't know about squirting water, but certainly you will get a good "inspection window" there

poppet valve, thermostat, anode, all things easily removed & replaced

(part of your normal maintenance anyway)

[RayBersch]

ran well no overheat warning sound with full RPM. Water is still barely drizzling out of the side discharge hose.

Would it be a problem if I remove the exhaust cover plate ........? What if I remove the elbow that the hose is attached to? ....... If I remove the exhaust cover do I have to remove the lower part of the cowling?

Whoa, I'm kinda wondering why you want to continue fooling with this thing. Ran well, no over heat, just does not spit much water. Look at the video Townsends provided and notice the stream - it is exactly what I experience with my F150 - by Merc standards, and my DF50 Suzuki for that matter, thats just a drizzle. Perhaps post a video of your water stream so others can comment on if its normal. You have no history of how much is normal and I would hesitate to go pulling things apart until you get more experience with the motor. The chart of the water flow is excellent so perhaps concentrating on the pilot hole back to the fuel cooler to see if you can clear a restriction. After running for a few hours and all else is OK, then start working on the details. Just my humble opinion.

Ray

[zenoahphobic]

Usually a small stream there is something wrong with your prostate. All those hair folicle eating things maybe.

No one has queried the black plastic stuff. Could that be bits off a previous impeller ?
If that is the case it is not uncommon that other bits of the impeller are stuck somewhere else. This where a wire needs to be used.

[boscoe99]

Whoa, I'm kinda wondering why you want to continue fooling with this thing. Ran well, no over heat, just does not spit much water. Look at the video Townsends provided and notice the stream - it is exactly what I experience with my F150 - by Merc standards, and my DF50 Suzuki for that matter, thats just a drizzle. Perhaps post a video of your water stream so others can comment on if its normal. You have no history of how much is normal and I would hesitate to go pulling things apart until you get more experience with the motor. The chart of the water flow is excellent so perhaps concentrating on the pilot hole back to the fuel cooler to see if you can clear a restriction. After running for a few hours and all else is OK, then start working on the details. Just my humble opinion.

Ray

Sounds to me like he is a guy in search of a problem when there is none.

The chart from the Yamaha service manual also fails to include the fuel/water heat exchanger which also diminishes the output pressure at the tell tale.

Yams drizzle. Mercs pee like race horses.

[RayBersch]

Sounds to me like he is a guy in search of a problem when there is none.

Every time I do too much searching I usually find a self-induced problem and as each year goes by I find the problem has existed for yet another year............just sayin.

[josesirven]

Finally got it done, it was driving me crazy. I know I would not have enjoyed the boat if I didn't know what was restricting the passage. It must have had an old water pump impeller that broke up in small pieces. I removed the rectifier and was able to feel items blocking the back of the 90 degree elbow coming out of the exhaust cover. I had to remove the exhaust cover and I am so glad I did, I found all kinds of stuff lodged inside. I had to use a drill bit to clear out the hole, it was so clogged and crammed with black plastic looking things. I also cleaned up all the salt buildup.

Next week I will change the balancer, VST filter and send the injectors for cleaning just to be on the safe side.

Any advice on the belt, it looks new should I change that also?

This boat sat for 11 years on davits (132 hours only) and I just don't want to take any chances on blowing this motor so I am doing everything that I can think of that could be an issue.

Thank you everyone for the advice,
Jose Sirven

[fairdeal]

Any advice on the belt, it looks new should I change that also?

This boat sat for 11 years on davits (132 hours only) and I just don't want to take any chances on blowing this motor so I am doing everything that I can think of that could be an issue.

Given that, and as the motor is an "interference" design, suggest you change the belt.

Also advise to get the Yamaha Service Manual

[josesirven]

Will do, thanks

[TownsendsFJR1300]

Glad you found it as that possibility was mentioned earlier..

PM sent too.

[zenoahphobic]

Glad you found that you actually had a problem (sceptics suggested you didn't), and that you identified it as blockage from broken impeller bits, and that it was not your prostate.

[boscoe99]

Glad you found that you actually had a problem (sceptics suggested you didn't), and that you identified it as blockage from broken impeller bits, and that it was not your prostate.

I am/was not a sceptic that suggested there was no problem. I am/was convinced the motor did not have a problem.

Is every motor every where that ever has a bit of swarf and swill located within to be dismantled to clear it out?

Obviously some motor owners believe it to be so.

[zenoahphobic]

I am/was not a sceptic that suggested there was no problem. I am/was convinced the motor did not have a problem.

Is every motor every where that ever has a bit of swarf and swill located within to be dismantled to clear it out?

Obviously some motor owners believe it to be so.

I would expect that all engines today would have all the "swarf and swill" meticulously removed as part of strict quality control. So i'd expect the answer is yes under warranty and consumer law.

However the interesting point I think you imply, is that every engine will gradually build up restrictions that are insignificant, and that if you do dismantle you will inevitably find something. The question I suppose is: at what point is it necessary to do such maintenance?

[RayBersch]

Well evidently josesirven has the skills to dismantle and assemble (or we hope he can assemble) - many do not - and while I would have eventually done the same thing, having been satisfied that it was not overheating I would have gained a bit more operational experience with the it before I tore into it - but that's just my approach. And he is doing the right things with the remainder of his plan so hats off to him and I wish him well with his new engine.

[TownsendsFJR1300]

+ 100^^^^^^