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Bought myself a project '99 LS2000

dabomb6608

New Member
Messages
6
Ratings
4
Points
1
Location
Marion, IL
Boat Make
Yamaha
Year
1999
Boat Model
LS
Boat Length
20
#1
Hello all,

Long post ahead but catching up about 2 weeks worth of messing around and getting a little background of me out of the way. Posted this on the old forum before I realized this was a "newer" version. Longtime member over at greenhulk under the name "raiderteen". Might post up there as well.

Been boating for about 15 years now, since I was about 11 years old. Got a '95 Waveraider 1100 summer of 2005 and still have it kicking around. That being said I have extensive experience with these 1100/1200 Yamaha motors. Had a '96 Glastron last summer as my own first boat. Bought it cheap with a cracked manifold and warped head. Got it running and ran it all summer long before selling it for a nice profit. I'm very mechanically inclined and not really afraid of jumping into any projects. I do mechanic work on jetskis/boats/vehicles on the side and buy/sell/trade a lot. Currently sitting on 7 different skis I bought over winter and have fixed up. Rebuilt several Yamaha power valve motors and also non-power valve ones over the past few years for customers or from skis I was flipping.

Well Feb 21st I found myself this '99 LS2000. Purchased for $2000 in "as is" condition. Owner stated one motor shut down and he thought had electrical issues. Other motor supposedly ran. Pretty dirty cosmetically but really just needing a deep cleaning. Few rips in sun deck and rear back rests. Otherwise in decent shape. I knew going into it to expect the worst as that's how everything goes when purchasing used from someone who doesn't know anything about them. But I knew what I was getting and knowing I have experience with these motors made me confident enough to purchase. without any hesitation. The market for these is still good it seems around here and I have plenty of meat on the bones to invest in it and still sell down the line when I upgrade. I promised my significant other we would be keeping this one for at least 2 or so years...unless I get a insane offer that is lol.

Anyways, got it home and started digging into it. First a compression check. Port motor I could spin by hand at the coupler. Starboard seemed froze. Both motors didn't click or attempt to turn over initially even with jumping the solenoid. Checked wiring and all was good. No corroded cables or any other typical issues. Pulled starters and jumped them with cables. Still nothing. Port starter was froze and starboard starter had something catching when I spun it by hand. Tore them apart and found a froze bearing in the port starter and destroyed magnets in the starboard. Had a spare starter from a Kawasaki that had a matching center section. Between the three I was able to get both working properly.

With the starters reinstalled it was back to a compression check. Port motor checked out fine. ~120 across all three. Starboard was a different story. Something had it bound up. At that point I decided to start tearing it down.

But before I did that I wanted to test fire the port motor. Poured some premix down the carbs and turned the gas valve on and it started right up. Great! Back to the problem motor....

Once the head was removed I found a mag piston with a hole burned through it. Scaring in mag and PTO cylinders. Was very substantial in Mag cylinder. PTO was just slightly scared below exhaust port. A quick note, these were converted to premix. I removed the Mag piston in an attempt to see if I could find any obstructions to the crank in the casing. Nothing there. I removed the front cover to inspect the flywheel and bendix. Nothing other then a lack of grease everywhere. Had rusty shavings that I believe were from a worn bendix that stuck or from missing washers on the bendix.

At this point I started trying to rotate the motor by hand. It would rotate slightly, so I tried seeing if I could hear where it was "hitting". Looking at the coupler it looked like the coupler was resisting. So I decided at that point to turn my attention to the pump. After some choice words and a bit of force the pump finally pulled out. And I found my second major issue. A corroded impeller housing causing the liner to swell and contact the impeller. Good news was the motor now turned over. The bad news was I noticed somehow the midshaft had broke and the only thing holding it in place before was the driveshaft splines...

I started tear down of the carbs. They weren't "terrible" but they weren't "great" either. No clogged jets or passages. Return restrictors were clear. Fuel pump check valves weren't creased. They just had a bit of nasty from old fuel sitting in them. Genuine Mikuni diaphragms that were still soft. I did notice that my High and Low screws were adjusted from factory spec. With the Mag carb having highs almost half a turn lean.... I was a bit concerned that I didn't find any substantial evidence of a fueling issue other then the high/low screws.

Another thing to note. Both engines appear to be SBT motors. For sure the starboard. Pistons are SBT brand.

I then unbolted the engine from the mounts. Noticed one rubber mount was separated and no longer usable. This potentially caused a misalignment which caused the mid shaft issue mentioned later. From there I was able to yank the rest of the motor out by hand last night ever so carefully. Being a tall and lanky build certainly helps in tight areas. I wrapped a tie down around the motor making sure to secure it from shifting any. Then lifted it up and onto the back swim platform. Then jumped out of the boat and carried it into the garage.

At this point I also removed the mid shaft assembly. Confirmed the shaft itself did indeed break at the coupler. Appeared to be an old break as it had rust on the breaks surfaces. With the splines on both ends of the break its highly possible it went unnoticed as it still would function with maybe a bit of chatter.

I started tear down of the crankcase. Once apart I cleaned out the cases and inspected the crank. I am a bit weary of a couple bearings. Its possible there are some aluminum pieces still hanging out in them and it needs a very thorough flushing/cleaning. I've had worse feeling bearings from a PV motor clean out great and be just fine. The aluminum is much softer then the steel bearings thankfully so hopefully they clean out fine.

A few side notes I found on the motor tear down. It appears this motor busted out the bottom of the crankcase when SBT got a hold of it. Its been welded and repaired. I have pictures of that as well.

At this point last week I was at a cross roads between rebuild/reman motor/used motor. I ended up finding a killer deal on a complete running motor with electronics/carbs/exhaust out of a exciter on eBay for about $600. It is located down in south Florida so needed to arrange shipping. I got a hold of the shipping company who delivered my Harley from south Florida a few years ago and sure enough they will be heading up this way with a load of bikes after Bike Week in Daytona. So looks like potentially the week of 18th-22nd I could have the motor in my hands. Cost was $200 for them to bring it up. That timeline works out perfect for me considering I leave this Saturday for a cruise and won't be home till the 17th. I plan to do a thorough cleaning of the engine compartment when I get back in town before dropping the new motor in.

With going this route I will have a spare motor to rebuild this spring, spare carb set, spare E-Box, as well as spare exhaust manifold/stinger.


Once I have the motor dropped in and everything tests out okay I have upgrades here and there planned.. Most likely will install the groupk fuel/air separator. Stereo system install. Add some LED lights throughout. Maybe do the steering upgrades available. Sticker delete/replacement as most are faded. Deep clean everything. Hyrdoturf mats or Seadek if my wallet can take the hit. Find a replacement step ladder as the main U hoop is missing. Dual batteries. Gauge upgrades. The list is long and will get done slowly through the summer. I've got a solid month or two before boating season kicks in full swing so have plenty of time to at least get her water ready. I have already spent the past two weeks soaking up additional info about these boats from here including a lot of the "must dos". I look forward to sharing my progress as I move forward on it.

Here are shots of the boat and motor tear down.
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Scottintexas

Jetboaters Captain
Staff member
Messages
3,155
Ratings
2,124 43
Points
243
Location
Corinth, TX (DFW)
Boat Make
Yamaha
Year
2007
Boat Model
AR
Boat Length
23
#2
in "as is" condition. Owner stated one motor shut down and he thought had electrical issues.

View attachment 89023
If we haven't heard that a hundred times before, definitely probably "just an electrical issue"

Glad to have you on board, where are boating at ?


.
 

dabomb6608

New Member
Messages
6
Ratings
4
Points
1
Location
Marion, IL
Boat Make
Yamaha
Year
1999
Boat Model
LS
Boat Length
20
#3
If that isn't the truth lol. I knew full well going into it to expect the worst. At the price I got it I knew I could drop two motors into it and still be ahead so wasn't too concerned.

I guess I should update my profile info on here. I am in Southern Illinois, boating on Lake of Egypt mainly with some trips to the Ohio River and possibly Rend Lake. I saw in June there is a river run going on over on the Kaskaskia River we talked about potentially checking out in June as well.

I grew up boating on the Ohio River down in Golconda, IL. Family had a 27' Bayliner and my jetski. Some of my favorite memories were made down there.
 

BigAbe75

Jet Boat Junkie
Messages
1,021
Ratings
695 18
Points
148
Location
Litchfield, IL
Boat Make
Yamaha
Year
2011
Boat Model
SX
Boat Length
21
#5

Speedling

Jetboaters Admiral
Messages
4,489
Ratings
3,645 33
Points
293
Location
Cedar Lake, IN
Boat Make
Yamaha
Year
2008
Boat Model
SS
Boat Length
21
#7
I did the same with my first boat,an exciter!
I have the piston on my desk as a trophy of sorts. Po had an oil line fall off. Upgrade lines is the key!
 
Messages
6
Ratings
4
Points
1
Location
Marion, IL
Boat Make
Yamaha
Year
1999
Boat Model
LS
Boat Length
20
#8
Welcome! Looking forward to following along.

Checkout our Shelbyville gathering at the end of July too. It’s a great time, as well.

https://jetboaters.net/threads/2019-lake-shelbyville-gathering-july-24-july-28-2019.20821/
That looks very interesting! That also is not far at all from where I bought the boat! I purchased from a guy over near De Land, IL. I will have to look into it and mention it to the lady. I've never boated Lake Shelbyville, but it looks like a nice lake.

In other news,

I am still awaiting my replacement motor. It was picked up by my transporter and is looking like he will be up this way next week. I have done a little bit of cleaning inside the engine compartment at a car wash but now need to get in and wipe everything down. My replacement impeller housing and intermediate shaft assembly are getting delivered today. I can work on getting those installed this weekend hopefully. Three of the four bolts snapped holding the pump on so will need to get those taken care of.

Once the engine is here I will button up everything in the engine compartment before dropping it in. Then it will be pretty close to test run time. I need to go through some of the wiring by the dash at some point. Previous owners removed the lanyard and I wouldn't be surprised if the other kill switches in the shifters and rear lid aren't deleted as well. I've got wiring diagrams so will just need to do a lot of tracing. I might eventually reinstall those systems to stock functionality.
 
Messages
6
Ratings
4
Points
1
Location
Marion, IL
Boat Make
Yamaha
Year
1999
Boat Model
LS
Boat Length
20
#9
I did the same with my first boat,an exciter!
I have the piston on my desk as a trophy of sorts. Po had an oil line fall off. Upgrade lines is the key!
Its funny you mention the trophy piston. I've got 3 "trophy" pistons from various motors I have rebuilt for customers. I will be adding this one to my display for sure.
 
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