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Author Topic:   2300 rpm Max????
pist2348 posted 05-31-2001 05:47 PM ET (US)   Profile for pist2348  
Has anyone out there had a similiar problem with a 70 hp Yamaha. The engine is only about 5 years old, but after about 2 minutes of 5,000 rpm it starts running bad and won't even hold a plane. Any thoughts???
Clark Roberts posted 05-31-2001 07:33 PM ET (US)     Profile for Clark Roberts  Send Email to Clark Roberts     
my thoughts are that you may have an alarm (valid or invalid) which is cutting your rpm! Have the alarm module checked...just a guess... Happy Whalin' .. Clark
pist2348 posted 06-13-2001 11:22 PM ET (US)     Profile for pist2348    
Thank you, I will start there.
Toad2001 posted 06-14-2001 02:12 AM ET (US)     Profile for Toad2001  Send Email to Toad2001     
I had a 50 hp Yam 3 cyl 2 stroke and it did something similar. The power loss was apparently the coil (coil packs?).
Soon after it totally crapped out with a seized engine. I hated that engine. It apparently had a problem with the oil injection system too...

JB posted 06-14-2001 10:09 AM ET (US)     Profile for JB  Send Email to JB     
Per Clark, it's either the alarm itself, an overheating problem, or a lubrication problem. The Yami is designed to drop down to 2000 rpm in the event of (some) problems to allow you to get back to port/shore.
pist2348 posted 09-09-2001 12:41 AM ET (US)     Profile for pist2348    
I figured out what was the problem. The fuel filter was in backwards.
Just thought you all might benefit from my stupid mistakes.
kingfish posted 09-09-2001 05:03 PM ET (US)     Profile for kingfish  Send Email to kingfish     
The only stupid mistakes are the ones we don't learn from - thanks for sharing your experience.

I'll tell you the story someday about the time I trailered over to Lake Michigan the day after I had been doing some polishing around the dash board that had necessitated disconnecting the kill switch to get it out of the way, and laying it on top of a piece of dashboard trim. Dropped the boat into the water at a busy ramp, parked the car and trailer, got into the boat with my wife who wasn't doing her favorite thing in the world by being there to begin with, and the boat wouldn't start. Wouldn't even cough. Tried everything I knew, and finally lost my nerve to the cold stares of the guys who wanted the space I was taking up at the dock and the dead silence coming from my wife. Got the car, pulled her out and as I was organizing things for the trip back home in the tie-down lane, I happened to *look* at the dashboard (apparently for the first time that day), and there, right in front of my eyes, shimmering in the sunshine with the angelic choir singing in the background like the crossed palm trees at the end of "It's Mad, Mad World", was my disconnected kill switch and the reason the old girl just would not start.

Well, I guess I went ahead and told the story, didn't I?



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