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Just bought a boat that hasn't been cranked in 4 years

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Just bought a boat that hasn't been cranked in 4 years

Old 05-25-2017, 07:59 AM
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Originally Posted by BBQ BOY View Post
i thinkI'm going to take it to a mechanic.
That's the best way to start out. The last thing you want to do is create a bigger expense for yourself because you've never worked on one of these engines before. Play it safe and have a mechanic check out the items mentioned above. You'll come out ahead in the long run.
Old 05-25-2017, 10:07 AM
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Originally Posted by BBQ BOY View Post
Oh I experienced those in the 90's. Lol.
and now an HPDI, you are a glutton for punishment...j/k i Hope the engine works out great for you.
Old 05-25-2017, 10:08 AM
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Originally Posted by BBQ BOY View Post
i thinkI'm going to take it to a mechanic.
probably not a bad idea.
Old 05-25-2017, 11:16 AM
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Originally Posted by BBQ BOY View Post
i thinkI'm going to take it to a mechanic.
As you don't know where the impeller is, this is a great idea.
Great motors but they need attention.
Old 05-25-2017, 11:22 AM
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Originally Posted by Cobia 217 View Post
That's the best way to start out. The last thing you want to do is create a bigger expense for yourself because you've never worked on one of these engines before. Play it safe and have a mechanic check out the items mentioned above. You'll come out ahead in the long run.
Yeah you already got a hell of a deal spend the extra cash to have it looked at
Old 05-25-2017, 12:14 PM
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Some terrible advise on here as usual.
Old 05-25-2017, 12:39 PM
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Originally Posted by WPBTH View Post
Some terrible advise on here as usual.
and just as useful as your post if you don't clarify
Old 05-25-2017, 12:54 PM
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This type of thread comes up every week or so... why not search?? http://www.thehulltruth.com/search.php
Old 05-25-2017, 01:38 PM
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Hooked up a new starting battery and it looks like the fuel tank is empty or close to it. Last bar is blinking.
Old 05-25-2017, 01:40 PM
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Originally Posted by mystery View Post
This type of thread comes up every week or so... why not search?? http://www.thehulltruth.com/search.php
Search for what, exactly? I'm not sure of what specific word to enter to know what to do.
Old 05-25-2017, 02:13 PM
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I can tell you exactly what you are up against.
I bought a boat with 2 HPDI 150s that sat for four years.
I love these motors and they are VERY efficient and powerful.
That said- I spent $8000 over two years getting the fuel system straightened out.
New low pressure pumps and mid pressure pumps. Rebuilt High pressure pumps.
6 new injectors, 6 cleaned and flow tested. New VST filters, injector filters (Mystery filters)
It was a nightmare and took forever, but it has been worth it. Do yourself a favor and DO NOT try to start that thing. Take it to a Yamaha MASTER mechanic. Not just any mechanic. (Experience speaking here)

These motors are amazing when taken care of. They want CLEAN gas. Like, a 10 micron water separator followed by a 2 micron. NEVER any ethanol, and NEVER let them sit. Ever again.
Old 05-25-2017, 04:42 PM
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Originally Posted by aquaholicnc View Post
I can tell you exactly what you are up against.
I bought a boat with 2 HPDI 150s that sat for four years.
I love these motors and they are VERY efficient and powerful.
That said- I spent $8000 over two years getting the fuel system straightened out.
New low pressure pumps and mid pressure pumps. Rebuilt High pressure pumps.
6 new injectors, 6 cleaned and flow tested. New VST filters, injector filters (Mystery filters)
It was a nightmare and took forever, but it has been worth it. Do yourself a favor and DO NOT try to start that thing. Take it to a Yamaha MASTER mechanic. Not just any mechanic. (Experience speaking here)

These motors are amazing when taken care of. They want CLEAN gas. Like, a 10 micron water separator followed by a 2 micron. NEVER any ethanol, and NEVER let them sit. Ever again.
Thank you for the input.
Old 05-25-2017, 05:09 PM
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I can't comment on the hpdi but I just sold a 99 177 sf with a 115 2 stroke with 4500 hrs and that boat ran high 40's, that hull dry weighs about 1000 lbs. A 150 set up right should be a rocket. Great hull, good luck.
Old 05-25-2017, 05:16 PM
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Originally Posted by sealark View Post
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.
If your going to do anything yourself start here. Dont go replacing a bunch of things until you get it running then go backwards from there. If your not that handy you will need to bring it to a mechanic see if you can watch him and learn a few things.
Old 05-25-2017, 05:34 PM
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Originally Posted by never2rough View Post
I can't comment on the hpdi but I just sold a 99 177 sf with a 115 2 stroke with 4500 hrs and that boat ran high 40's, that hull dry weighs about 1000 lbs. A 150 set up right should be a rocket. Great hull, good luck.
when I fished this boat with my buddy a few years ago, we hit 58
Old 05-25-2017, 10:32 PM
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Originally Posted by aquaholicnc View Post
I can tell you exactly what you are up against.
I bought a boat with 2 HPDI 150s that sat for four years.
I love these motors and they are VERY efficient and powerful.
That said- I spent $8000 over two years getting the fuel system straightened out.
New low pressure pumps and mid pressure pumps. Rebuilt High pressure pumps.
6 new injectors, 6 cleaned and flow tested. New VST filters, injector filters (Mystery filters)
It was a nightmare and took forever, but it has been worth it. Do yourself a favor and DO NOT try to start that thing. Take it to a Yamaha MASTER mechanic. Not just any mechanic. (Experience speaking here)

These motors are amazing when taken care of. They want CLEAN gas. Like, a 10 micron water separator followed by a 2 micron. NEVER any ethanol, and NEVER let them sit. Ever again.
8,000 holy shit man...You could have bought a used 4 stroke Yammie for that or like 4 fichts.
Old 05-25-2017, 10:51 PM
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Originally Posted by midcap View Post
8,000 holy shit man...You could have bought a used 4 stroke Yammie for that or like 4 fichts.
That's twin 150s, with less than 300 hours on them. $4000 each in parts, labor and rebuild service.
I priced out 150 Yamahas at $26000 rigged.
Old 05-25-2017, 11:02 PM
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Originally Posted by aquaholicnc View Post
That's twin 150s, with less than 300 hours on them. $4000 each in parts, labor and rebuild service.
I priced out 150 Yamahas at $26000 rigged.
So you had them already?
Old 05-26-2017, 07:09 AM
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Originally Posted by midcap View Post
So you had them already?
I, like the original poster, came across a heck of a deal on a boat that had been sitting. I love a little project. The boat and motors in question are in my profile pics.
New vinyl, new upholstery, new electronics, new pumps etc and basically new engines (less than 300 hours) on a 17 year old boat.
Old 05-26-2017, 07:24 AM
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Originally Posted by captpepin View Post
If your going to do anything yourself start here. Don't go replacing a bunch of things until you get it running then go backwards from there. If your not that handy you will need to bring it to a mechanic see if you can watch him and learn a few things.
Do not do this. Do not crank the motor, it may start, but your problems will just be beginning. That old gas in the VST tank will get into your HP pump and mystery filters and then you'll be spending $4K to get it cleaned. Get that old fuel out of the motor and tank, change all the filters, then crank it with clean gas/seafoam combo. I've done this with several older HPDI's. Change the impeller and gearcase oil as well. Whatever you do, DO NOT CRANK IT while old gas is in the system. If you have to take it to a mechanic, ask to watch so you can learn how easy it really is to maintain your hpdi. They are powerful efficient motors, but clean fuel is a must, it can not be overstated with these motors.

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