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I just acquired a boat with a 2002 Yamaha 150 Vmax that has been sitting for 2 yrs.

Posted on 8/7/17 at 4:26 pm
Posted by Jack Daniel
In the bottle
Member since Feb 2013
25406 posts
Posted on 8/7/17 at 4:26 pm
What do I need to do?

Previous owner took good care of the boat and kept Sta-bil in the fuel. It ran fine before he sat it up and I don't want to damage anything by trying to start it after sitting that long.
Posted by Clames
Member since Oct 2010
16536 posts
Posted on 8/7/17 at 4:44 pm to
I'd drain whatever old fuel left in it as completely as possible the refill fresh with a good dose of Marine StaBil. Check/replace every other serviceable lubricant too. Pull a spark plug and look into a cylinder if possible. Anyone who does their own maintenance or buys used vehicles should get a cheap smartphone inspection camera. For $10 bucks they are worth tossing a few in a vehicle or garage.
Posted by Tbooux
Member since Oct 2011
1680 posts
Posted on 8/7/17 at 4:44 pm to
Prob fine but I'd drain all fuel and refill with premium and can of sea foam if you want to be extra cautious. Definitely change out fuel water seperator as well. If it doesn't have one definitely install one prior to cranking up.
Posted by Jack Daniel
In the bottle
Member since Feb 2013
25406 posts
Posted on 8/7/17 at 4:46 pm to
What other serviceable lubricants do you mean?
Posted by Tbooux
Member since Oct 2011
1680 posts
Posted on 8/7/17 at 4:47 pm to
Lower unit oil?
This post was edited on 8/7/17 at 4:52 pm
Posted by Clames
Member since Oct 2010
16536 posts
Posted on 8/7/17 at 4:59 pm to
If it's a 4-stroke then it should have an engine oil sump, I assume the drive uses its own oil or grease, and probably some other points that need some sort of lube. I hope you downloaded the owners manual or have it available.
Posted by Geauxtiga
No man's land
Member since Jan 2008
34377 posts
Posted on 8/7/17 at 5:00 pm to
What about the impeller?
Posted by Jack Daniel
In the bottle
Member since Feb 2013
25406 posts
Posted on 8/7/17 at 5:04 pm to
It's a 2-stroke
Posted by Beessnax
Member since Nov 2015
9124 posts
Posted on 8/7/17 at 6:11 pm to
quote:

What about the impeller?


Definitely check the impeller
Posted by bamarep
Member since Nov 2013
51794 posts
Posted on 8/7/17 at 7:00 pm to
Replace the water pump and clean the carbs.

Make sure the lower unit oil is clean.
Posted by tipup
Member since Sep 2005
1649 posts
Posted on 8/7/17 at 7:41 pm to
Make sure you get a battery that is the recommended CCA's.

The high pressure fuel pumps on the HPDI's like a fresh battery.
Posted by HeadBusta4LSU
Baton Rouge
Member since Aug 2007
11312 posts
Posted on 8/7/17 at 8:11 pm to
Make sure you also change the VST filters. These are the main culprit that makes HPDI's go boom. If those are properly maintained you shouldn't have issues
Posted by Buster180
Member since Jun 2017
1455 posts
Posted on 8/7/17 at 9:16 pm to
quote:

Definitely check the impeller





Yep, and if you are going to go through the trouble of checking it you might as well replace it. They are cheap.
Posted by Sid in Lakeshore
Member since Oct 2008
41956 posts
Posted on 8/7/17 at 10:16 pm to
quote:

if you are going to go through the trouble of checking it you might as well replace it. They are cheap.


Yep.
Posted by Cypressknee
Member since Jul 2017
1194 posts
Posted on 8/8/17 at 6:58 am to
Is it carbed or fuel injected?
Posted by Jack Daniel
In the bottle
Member since Feb 2013
25406 posts
Posted on 8/8/17 at 7:06 am to
Carbs
Posted by Cypressknee
Member since Jul 2017
1194 posts
Posted on 8/8/17 at 8:23 am to
I'd do a tune up on it and you should be good. Drain the fuel as mentioned. Change the fuel lines, primer bulb, low pressure fuel pumps (2), clean/rebuild carbs, spark plugs and water pump kit. Just my .02

This post was edited on 8/8/17 at 8:25 am
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