BBQ BOY

A friend of mine sold me his 2004 Scout 177SF with 150 HPDI V-MAX. If memory serves, it has about 200 hours on the boat and motor. He never used it and he also has Hells Bay, So, he said to give hi $2k to get it out of his way, and I jumped on it since I know the boat.

Anyway, I pulled all 3 batteries and plan on replacing those since I do not think they will be any good since they never had a trickle charger on them and they were just sitting.
Secondly, and what I am most concerned with, is the old fuel. I am guessing if I simply siphon the fuel out and refill, then all should be good? How about the fuel that may be in the line or may still be in the carb? Should I go ahead and replace the fuel filter and spark plugs? Mind you, I am not exactly a mechanic, but I am guessing all of this can be done by the average guy?

6104696

Carb???

midcap

I am going to assume it's an 2004 engine like the boat is. Given that, Yamaha offered a Vmax in all three flavors that year, Carbed, Fuel Injected and High Pressure Direct injected.

I hope that the Op does not have the HPDI model.

Flyinal

Replace all fuel lines, clean the tank, put kits in the carbs, and look on YouTube for instructions on using seafoam on a motor that's been sitting. I can't remember the process, but it involved using deep creep to soak the cylinders and running higher concentrations of the motor treatment after that. It was a several step process, but I took a 1990 225 2 stroke with just over 500 hours that had been sitting almost 7 years and brought it back. Started, idled, and hit WOT like a champ. I was very pleased with the process!

6104696

I assumed HPDI, since he said....HPDI.

BBQ BOY

It is HPDI as I mentioned. In my research, the 150 and 200 hpdi motors were great motors. Not so much for the 250 and 300

midcap

lol ,long day for me

midcap

It could have been worse, you could have bought a small block ficht from the late 90s.

BBQ BOY

Oh I experienced those in the 90's. Lol.

dropthatpuck

That's a huge engine for that boat. I had a 150 on my 185SF and it was the upgrade. I think the max on those is 115hp. It'll certainly get out of its way once you get her running!

sealark

Id hook up a 6 gallon tank pull the plugs put a little mystery oil in each cylinder and hand rotate the engine several times. replace the fuel line from engine to the 6 gallon tank and plugs then try running it. Then take it from there.

TedBrick

And change the impeller. Before you start it up...
brick

reelintheyears

Also change the VTS (VST?) filter and tank. The filter is likely clogged after sitting for 4 years. Do a search on this forum and you-tube. Good Luck!

BBQ BOY

change the fuel tank thats buried in the floor?

BBQ BOY

150 is the max rating. It is a rocket, that is for sure. It will jump coke bottles from a stop and go.
Not sure how to do that since I do not even know where the impeller is located. Ket me check youtube.

jeff7y28

If you aren't sure about doing the work yourself everyone has recommended, for what you have in your boat, you could afford to take it to a Yamaha mechanic. By all means, drain the tank, change all fuel filters, fuel lines, VST filter, water pump, and lower unit gear lube. Also, grease all the fittings, especially the steering. Not sure if you have hydraulic or mechanical steering, but I would completely disassemble the steering at the back, clean, and grease. It is not a whole lot of fun to hit the water and have your steering freeze up.

BBQ BOY

i thinkI'm going to take it to a mechanic.

Blue agave

I would not crank the motor. Remove the spark plugs, pour in some marvel mystey oil and turn the flywheel by hand. Inspect the cylinders and pistons with a camera and if you can the crank and journals. As mentioned, take it to a mechanic if not comfortable and knowledgeable enough.

Sea Snake

Best idea yet.....you only have a couple grand in it...spend 4 or 500 and have all that stuff replaced by a pro, and he'll have it up and running like new....in one day.

good luck....

tunanut

You should learn how to change the VST filter yourself. It's not that hard, 3 bolts and 10 screws. Filter is on the bottom of the LP fuel pump. The mid pressure filter is above the VST housing and is a little tricky, but should be changed as well, yahama is very proud of these puppies. That's a good motor, but it needs clean fuel. Should be a real nice boat for the $$$ once you get it up and running. A 10 micron or less fuel/water filter should be installed in front of the motor is you don't have one. It will cut down on your inside the cowling filter changes.