Is everyone able to fit all cables into the rigging tube?

[BTF112989]

I used my finger thermometer on the heads.  An old mechanic taught me that if the engine is within normal operating temps, you can touch the heads momentarily then after a second or two your fingers get too hot to keep touching them.  If the heads are overheated, then as soon as you touch them, you have to take your fingers off/you will burn your fingers.

Yeah, hopefully the engine is okay, since I cut it off within 2 seconds of the alarms going off.  Seabob, you just made me feel alot better!  Hearing a second opinion from a trusted source is very reassuring.  

I would say its a design failure on Yamaha's part for this newer shaped "body style" yamaha.

-Ben

[seabob4]

Ben,
Newer Yams are great motors (yeah, I know, the HPDI threads on THT, and the 4S corrosion threads as well), but they have their...quirks.  

First time I had an HPDI, and she did exactly as you described, I could hold my hand on either head...yeah, it got pretty warm, but not hot.  I was like, WTF?

[BTF112989]

Yeah, once you get past the no telltale on muffs as well as  figuring out how to manage all of the filters, they are great engines.  The 10 micron water/fuel separating filter is the best investment I have made on that engine.  I spent tons of money & had constant breakdowns due to EXPENSIVE filters failing(probably combined with a 20 year old gas tank with lots of debris in it) in the engine, but once I figured out how to manage the filters everything has been great!  They are just quirky.  I am about to try & replace the micro filters in the fuel pump in a few weeks.  I love the fact that its still a 2-stroke with some modern technologies mixed in to give me better fuel burn numbers.  I am not ready to give up that torque, faster acceleration, and 2-stroke smell of my childhood just yet.  

Part of me enjoyed firing her up out of the water today in my quiet neighborhood & hearing that loud 2-stroke exhaust.  I'm sure my neighbors just loved it as well!

My local yamaha mechanic(when I still went to him) said the HPDIs are great engines & can log tons of hours with the best of them!

-Ben

[seabob4]

Ben,
In certain respects, HPDIs kind of remind me of the old Ficht motors.  If they were going to die, it would be very early in their lives.  But once they made it past, oh, say, the 250 hour mark, they were good to go.  The filters aren't that bad, just have to know how to take chit apart to get to them...like the VST filter.  Swapping out the filter is the easy part.  But even the service manual doesn't say squat in respect to the fact of how to go about getting the tank off without losing all the bolts to get at the filter...

If you want, I can walk you through filter replacement on your motor.  That way, you only pay for the parts...

OOPS, just read back through your post.  Apparently, you have that part down...

[slvrlng]

Don't forget flounderpounder's excellent thread on changing his filters out on his 250HPDI.


http://classicaquasport.com/phpbb3/view ... f=5&t=7793

[Capt. Bob]

Well that shows ya I don't know much about newer Yamahas but......

What I was saying about water coming out through the vents can be seen in this video. Also notice the pisser and that it is running on muffs.

http://www.youtube.com/watch?v=lbDJhnh3 ... re=related

Overheat alarm is telling you something. If water isn't coming out the vents then the t-stats are closed or....
The impeller ain't impelling.

Of course, the guy's running without the prop on and I thought that was frowned upon....
Shows you my knowledge base is limited.

PS.... This is the model motor you have, yes/no???

[seabob4]

CB,
I've been running 250s and 300s, can't really speak for 150s..I get fine water flow out the vents by the cav plate, but nothing out the pisser and the O/H alarm goes off after a few minutes.

The Cape Horn I have at the house has twin 200 HPDIs.  We'll see how these do...

[gran398]

The design idea is that they all need to pump water, when hooked to the muff.

[BTF112989]

Thanks for that HPDI micro filter link!  I was trying to find it.  I guess I might as well go ahead and order 10 of them in case I decide to change out the injector filters as well down the road.  I will definitely change out the four filter in the HP pump though.

Capt. Bob,
That is my exact engine in the video.  I wish mine would shoot water out of its telltale like that one does on the muffs.  

Seabob,
I will be curious to see how those 200 HPDIs do on that Cape Horn.  I thought my HPDI used to pee on the muffs back in 2005(last time I ran it on muffs), but I can't remember back to 2005 too well.  Still hoping my impeller is in one piece!

[fitz73222]

If I may interject something here...

The best way to find out if an engine is overheating is to put your hand on the exhaust baffle plate first. That is the large plate between the cylinders on V engines. In most cases the powerhead waterflow comes through the waterjacket behind the exhaust plate first. This fills the block and cylinder heads and warms the water and raises the block temp in anticipation of the thermostats opening at the designed temp. The reason for this waterflow is because the exhaust heats up instantly when the engine lights off. So the cylinder heads will heat up more slowly and hold the temp until the thermostats begin to open and water begins to circulate through them. If the exhaust plate heats up to where you can't hold your hand on it, you have a water pump problem; since it is first in line to receive water from the pump. In some cases the cylinder heads get hot enough that it becomes uncomfortable to touch before the thermostats begin to open and then they will cool down. If your engine has a poppet valve in the waterflow which is designed to regulate water pressure and slow down the waterflow so it will grab more heat, it too can cause an overheat condition but usually at high speed. By no means should the overheat alarm sound off on the flush attachment based on my experience. If the engine pumps water when you try it at the ramp, but not on the flush, replace the waterpump. It has damaged or broken vanes on the impeller tips and can't pump unless fully submerged in water because it has lost it's efficiency. I don't go more than two years on an impeller/thermostats for a couple of reasons; 1) just to inspect the system components and replace since it is inexpensive and 2) is to lubricate the driveshaft to crankshaft spline and recoat my greacase mounting bolts with Perfect Seal (Mercury) thread sealant to prevent stuck bolts. Change the gearoil every 40 hours and grease the propshaft.
Hope this helps!

[Blue Agave]

Time for a new impeller.

[seabob4]

Time for a new impeller.

Certainly won't hurt, change the oil while your at it, basically follow Fitz's advice.

I'm waiting on new batt trays for the Cape Horn, when I get them located, installed, and the batts cabled, I'll fire up the Yammis and report back with my findings.  One caveat though, this boat was just purchased up in Georgia and brought back down here, don't think the owner has used it since he bought it.  That being said, I really have no idea as to when the impellers were last changed.  So, we shall see...

[BTF112989]

Update!

I pulled the 22-2 to the lake today, met two of my friends there who had champagne ready to go, and we put her in the water!  I honestly thought my impeller was completely toast before I put it in after my recent muff experience, however I was pleasantly surprised!  She fired right off very easily, and starting shooting water out of her telltale hole.  

We launched her, then I pulled over to the dock at the ramp.  I saw a 2 liter coke bottle floating in the water and just thought it was some piece of trash. WRONG.  It was a jug fishing jug with a line & hook connected to it, so when I put the boat in reverse...I heard a thump thump thump near my engine.  Shut it off & raised it up to check everything out.  Nothing was around my prop, but somehow a hook & a string knocked a chunk of metal about 2" long by 0.5" wide out of the very back part of my skeg closest to the propeller.  Not a good start, but we went on.  I idled down the lake for awhile, then opened her up a little bit.  My test load was one 295lb friend, 190lb me, another 170lb friend, and a full tank of gas.  The weather was 52 degrees with a 15-20mph wind making for some light to moderate chop.

My first reaction was how wide & stable the boat was with a very smooth ride for the conditions.  That bow takes small chop very well.  I did notice she slides a bit while rounding corners(I guess trim tabs could fix this), but it doesn't really bug me.  I have a 17 pitch aluminum prop on her, so she popped right up out of the water.  I'll have to get used to docking her.  With my console set pretty far back from where a normal 22-2 console sits, I felt like I was docking a barge or a container ship, since I had that much boat in front of me.  With the test load described above & a pretty beaten up 17 pitch aluminum prop, she hit 5400 rpm WOT & hit 42mph.  I thought that was a pretty good baseline for that amount of weight in the boat & for only having a 150 on it.  

Overall a very good day & I am thrilled with the results.  I only wish it was about 30 degrees warmer outside, so I could have hopped in the water/stayed there longer & made a day of it.  But, I will take what I can get.  I have been so anxious to get this thing out on the water.  

After looking at the stream though, I am going to go ahead and order a water pump kit & I will change it out sometime next week.  I want to get it peeing hard again.

I also think I will be in the market for a new stainless propeller in the near future to try & get some more performance out of her.  Anyone have any propeller suggestions to get that last 100 rpms out of her at WOT?

Thanks for all the help guys!  My battery cables should be here within the next day or two!

-Ben

[seabob4]

Ben, you had a great day on the water (have a feeling that part of the skeg was ready to go anyway!  A pop bottle?)!!  Come spring, that will be the time to really start messing with her, performance wise.  Until then, enjoy any day you can get out on the water between now and then!    

[BTF112989]

May have been a pop bottle.  I guess I will never know though.  

Oh, I will be having many many days out on the water until then.  I am that crazy person each winter breaking the ice around the shoreline at the boat ramp, so I can launch the boat.  Its usually just me & the birds out there in the winter.

I like working on boats in the winter time because all the boat dealers, prop shops, etc are begging for my business up here.

I am going out again Friday and Christmas Eve.  And December 26th as well.  I have to make the most of my time off. Haha.

-Ben