SBT Jetski Engines, Parts & Accessories

Results 1 to 5 of 5
  1. #1

    Default Yamaha 800 Starting Help Needed.

    Submitted via email from mrzippy2k@hotmail.com


    Wow, did I ever blow it. 2002 XLT800 wasn't winterized as well as I thought. Tried to start it on Friday and only heard ticking noise coming from Starter Relay. Juiced up the battery and still the same. Removed and tested Relay and it checked out. Decided it must be a bad starter. Removed the two bolts holding in the starter and removed (while engine is still on hull). Finally got around to checking the impeller shaft and it was froze. A little oil in the cylinders and all is fine. Motor turns freely now.

    So here's the problem(s). I slid the Starter back in and bolted it up but it won't crank at all, not even the ticking sound.

    I can put a positive charge to the Brown Wire coming off the relay and I hear the relay closing.

    I can put power to the Starter side of the Relay and the Starter turns over but it's not turning over the motor (I can hear it whizzing, just like it does when it's out of the boat) but it doesn't seem to be meshing with the flywheel (thus turning over the motor). I've removed and re-installed the Starter several times thinking I may not be getting the alignment right as it slides in, but that doesn't seem right. I've slid my fingers in to kinda feel my way around - and all I feel is an externally toothed gear on the in-board side of the hole. The gear feels to be about the size of a half-dollar and spins very easy. (This is where I'm very confused. Since the Starter interfaces with this freely spinning gear, it only seems obvious that the Starter would freely spin when installed, so there must be something else which interfaces between the Starter, the gear and the flywheel.)

    I have a copy of the Yamaha Repair Manual and it called for engine removal to replace the Starter, but it doesn't mention anything other than remove engine, remove the bolts, remove the leads (which I did except remove the engine) Other than making it easier to get to the bolts, is there any other reason one would need to remove the engine? Do I need to access any internal part of the engine to correctly re-install the Starter? How does the Starter interface with the Starter Clutch?

    So I guess I'm fighting two major problems. First, the Starter spins but does not turnover the motor (which turns over freely - so no binding there) - any help??

    Second, once I get the Starter to turnover the motor (by applying juice to the Starter side of the relay) I will need help on troubleshooting the circuit from the Start button to the Relay answering the question why pressing the start button does not crank the Starter, which in turn cranks the flywheel. Note, I've already checked the fuse...it's fine)

    So, sorry for the long post, but I wanted to provide a clear picture of what is happening, that way we can focus on answers instead of several back and forth posts clarifying the problem.

    So, if you've ever installed a Starter on a Yamaha, and understand what is needed to get it to interface the flywheel, please offer advice. If you've ever troubleshot the electrical system and understand what is taking place between the start button and the Starter, please advise.

    Thanks,

    Please feel free to respond here, PM me or reply to mrzippy2k@hotmail.com

    OK, just downloaded another manual which has better graphics. I see where and how the starter interfaces with the starter clutch. The gears I was feeling (where the starter goes) is the Idle Gear from the Starter Clutch. So, maybe my problem is with the Starter Clutch not doing its job and spinning the Pinion Gear. I assume the weights in the clutch are a mechanical way of taking the energy from the spinning Starter motor, which is transferred to the Idle Gear and some how transferring the energy to the Pinion Gear. (is this making any sense?) So, what's the chances of the Starter Clutch going bad just like that?

    So, here's the events: It wouldn't turnover - alarm and dash does not come on. Weak clicking sound coming from Starter Relay when start button is pushed. Battery recharged. Strong clicking sound from relay when start button pushed - no alarm, no lights. Tried to "jump" the battery from car. Still ticking sound. Ticking sound ends (I figure I burned up the Relay). Apply direct power from the battery to the Starter side of the Relay - nothing. Made me think it was a dead Starter. Remove Starter (checks good). Remove Relay. Add power to Brown wire and it clicks - on/off. Checked for movement of Impeller shaft and froze. Lubed cylinders and freed up pistons (no binding at all). Reinstalled Starter, Reinstalled Relay. Nothing when start button is pushed. Apply power to starter side of Relay and the Starter turns freely, but does not turn the Pinion Gear (it whizzes just like there is no load on it)

    I'd like to fix one problem at a time and would like to get it where the Starter cranks the motor. Any help would be greatly appreciated.

    Z Y

  2. #2
    Joined
    May 2008
    From
    Cleveland,TN
    Posts
    6

    Default Re: Yamaha 800 Starting Help Needed.

    I would say that the whizzing starter is due to a stuck bendix clutch. Maybe shoot a little penetrant in the hole where you can feel the gear where the startet goes.
    The bendix is a one way clutch which engages the flywheel gear when the starter spins it. It could well be sticking.
    Try using a light and an inspection mirror to check for corrosion and or to see if you can spray oil in the bendix past the gear you can feel with your finger. Maybe even use a small punch to try and push the bendix towards the flywheel.
    Alternativly, you can take the flywheel cover off and inspect the bendix. It may not be removable without removing the flywheel, but you should be able to manipulate it to get it operating or determin if it needs to be replaced.

  3. #3
    Joined
    May 2008
    From
    Clearwater, FL
    Posts
    12

    Default Re: Yamaha 800 Starting Help Needed.

    I'd take the flywheel cover off. thought my bendix was sticking. it was engageing the flywheel gear and spinning that instead of the flywheel. I'm still looking for a used flywheel.

  4. #4
    Joined
    Mar 2003
    From
    SBT
    Posts
    21,545

    Default Re: Yamaha 800 Starting Help Needed.

    Go to the parts for sale on Pwctoday.com post what you need.
    SBT Tech Support is here to help with your problems.
    We try to answer each question quickly and accurately.
    Please do not use Private Messaging for Tech Support, use the forums.

  5. #5
    Joined
    Mar 2013
    From
    Boca Raton, FL
    Posts
    1

    Default Re: Yamaha 800 Starting Help Needed.

    What type of oil did you use on the cylinders?

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Yamaha 800 PV Oil Ratio
    By Timd in forum Yamaha
    Replies: 1
    Last Post: 07-27-2007, 08:59 PM
  2. Method to bleed oil- Yamaha GP 800
    By Dpilot in forum Yamaha
    Replies: 4
    Last Post: 05-20-2006, 01:52 PM
  3. FS: 2001 Yamaha XL 800
    By prboarder in forum PWC's For Sale
    Replies: 0
    Last Post: 08-03-2005, 12:19 AM
  4. '97 XP 800, Problem starting
    By molinaf in forum Sea-Doo
    Replies: 7
    Last Post: 02-19-2005, 06:15 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •