low power suzuki

[turbodaze]

Hoping one of you mechanics can help out here - I have '79 65 horse that won't put out under load. Starts fine, idles ok (maybe a slight miss), and under no-load condition revs up fine. But in the water the RPM's don't get up much at all - just bogs. Carbs look good, cleaned and reinstalled. Gas is fresh. Magnets and and coils under flywheel check good. Fishin's getting good and I'm stuck in the driveway.<br />Any ideas??

 

[JB]

Re: low power suzuki

Howdy, turbodaze. Fuel pump, tank pickup, primer bulb. Most likely fuel pump. Also possible: linkage that advances timing with throttle. <br /><br />Pump the primer bulb when it is bogging. If it picks right up it is definitely in the fuel system not getting enough fuel to the carbs.<br /><br />Long shot: Not running on all cylinders. This is easy to miss under no load or at idle. Pull plug wires one at a time. If there is no effect, that cylinder is dead.<br />Swap ignition parts until the problem swaps.<br /><br />Good luck.<br />JB

 

[cgrivois]

Re: low power suzuki

hey had a 93 dt25 with same exact symptoms. not sure if the two motors are comparable at all but my problem was a bad throttle position sensor. I tested it acording to mannual and it tested bad. replaced it and when I put it in the watter and gapped the throttle, almost through me out the back. good luck.<br /><br />craig<br />Columbia SC

 

[TxSkiff]

Re: low power suzuki

turbodaze,<br />I have an '87 DT 65 with the exact same problem. Revs with no problem in neutral but gas it in gear and it dies. I have not gotten into it yet but please let me know if you find the fix.<br />Thanks

 

[Joe Salty]

Re: low power suzuki

Hi, I have a 1985 DT65 w/the same problem! Runs great for neutral warmup, almost dies under load...steady pumping on the primer bulb helps... <br />Also, if I choke it, it comes back to life for a minute, then bogs again.<br /><br />Does the primer bulb helping mean the fuel pump is the problem? The previous owner disconnected the oil injection system. I read in some other posts that there was a low-oil-level sensor in the injection system that reduces the engine RPMs in dangerous conditions...does anyone know if this might be sending a false signal somewhere?<br /><br />Thanks!

 

[turbodaze]

Re: low power suzuki

Well, the low power saga on my 65DT has a happy but expensive ending. The final fix was a new CDI. The shop I used also highly reccomended that the coil be replaced as well because of the possibility that a bum coil could take out the CDI. Not sure if that's true or not, but I bought a new coil as well. Expect to spend over $300 for both items. Quite a ripoff, but these are hard to find. Obviously, you're going to want to make sure you replace the plugs, and verify coil operation before going after the CDI. <br /><br />Low fuel pressure problems are easier to identify - sqeeze the bulb, or run with the cowl off and spray fuel while it's booged down - if it revs up you know the problem is in the fuel system. (I've been told WD40 works well for this). <br /><br />Many thanks for all the feedback - we'll see you on the river!