Pabel1993 Posted June 9, 2020 Report Share Posted June 9, 2020 2014 Yamaha 250 sho, if I put the boat in reverse and give it any kindve throttle the motor will come out of the water ? Any ideas what could cause this I changed the seals on the trim piston and before this it wasn’t doing this.. does it just need to be bled or ??? Quote Link to comment Share on other sites More sharing options...
jh141 Posted June 9, 2020 Report Share Posted June 9, 2020 With the boat on the trailer does it smoothly trim and tilt all the way up and down? Quote Link to comment Share on other sites More sharing options...
smilemaker Posted June 9, 2020 Report Share Posted June 9, 2020 my first guess is a bad tilit piston. the main one that raises the motor. there is also a bypass vent on the side that releases the hydraulics so you can lift it by hand. see if it is backed out a little. Quote Link to comment Share on other sites More sharing options...
MuddyBottomBluz Posted June 9, 2020 Report Share Posted June 9, 2020 Does the boat ride good? It sounds like the stop pin may be set to high and when in reverse the motor pulls up, its pointed up, rather than push you when going forward. Move the pin down one hole and try it with the trim all the down and keep playing with until you see an improvement. JM2C. Quote Link to comment Share on other sites More sharing options...
Pabel1993 Posted June 9, 2020 Author Report Share Posted June 9, 2020 26 minutes ago, MuddyBottomBluz said: Does the boat ride good? It sounds like the stop pin may be set to high and when in reverse the motor pulls up, its pointed up, rather than push you when going forward. Move the pin down one hole and try it with the trim all the down and keep playing with until you see an improvement. JM2C. Where is the stop pin ? Quote Link to comment Share on other sites More sharing options...
Pabel1993 Posted June 9, 2020 Author Report Share Posted June 9, 2020 33 minutes ago, jh141 said: With the boat on the trailer does it smoothly trim and tilt all the way up and down? Yea it trims up and down fine Quote Link to comment Share on other sites More sharing options...
Pabel1993 Posted June 9, 2020 Author Report Share Posted June 9, 2020 32 minutes ago, smilemaker said: my first guess is a bad tilit piston. the main one that raises the motor. there is also a bypass vent on the side that releases the hydraulics so you can lift it by hand. see if it is backed out a little. I’ll check the vent Quote Link to comment Share on other sites More sharing options...
jh141 Posted June 9, 2020 Report Share Posted June 9, 2020 1 minute ago, Pabel1993 said: Yea it trims up and down fine If it rises and retracts smooth and quiet then it is losing pressure at the Top of the Tilt cylinder (internally) allowing the tilt ram to pull out when the pressure of being put in reverse is applied. Likely there is a problem with the seal stack at the base of the Tilt Ram. Could be a problem with one of the four Absorber valves also at the base of the Tilt Ram. If you replaced the top seal you would have had to remove those parts. Think of it like as if the nut at the bottom of the tilt ram was not there. SmileMaker has a good point. Make sure the manual release on the port side of the unit in closed snugly, thou if it was not closed the motor would not trim at all. Quote Link to comment Share on other sites More sharing options...
Pabel1993 Posted June 9, 2020 Author Report Share Posted June 9, 2020 3 minutes ago, jh141 said: If it rises and retracts smooth and quiet then it is losing pressure at the Top of the Tilt cylinder (internally) allowing the tilt ram to pull out when the pressure of being put in reverse is applied. Likely there is a problem with the seal stack at the base of the Tilt Ram. Could be a problem with one of the four Absorber valves also at the base of the Tilt Ram. If you replaced the top seal you would have had to remove those parts. Think of it like as if the nut at the bottom of the tilt ram was not there. SmileMaker has a good point. Make sure the manual release on the port side of the unit in closed snugly, thou if it was not closed the motor would not trim at all. Yea so I lost the balls on the absorber valve at the bottom and replaced them with ball bearings from ace , which weren’t exactly the same size slightly bigger and I’m wondering if that’s the reason for this.. I also didn’t know the torque on that bottom but so I’m wondering about that now Quote Link to comment Share on other sites More sharing options...
Pabel1993 Posted June 9, 2020 Author Report Share Posted June 9, 2020 2 minutes ago, Pabel1993 said: Yea so I lost the balls on the absorber valve at the bottom and replaced them with ball bearings from ace , which weren’t exactly the same size slightly bigger and I’m wondering if that’s the reason for this.. I also didn’t know the torque on that bottom but so I’m wondering about that now ..and could you point me in a direction of the deal stack at the base of the tilt ram ? Quote Link to comment Share on other sites More sharing options...
jh141 Posted June 9, 2020 Report Share Posted June 9, 2020 The Tilt Piston Nut torque is 70 foot Lbs. The size of the balls is critical it looks like. Not sure what else you you ask. " deal stack " Quote Link to comment Share on other sites More sharing options...
MuddyBottomBluz Posted June 9, 2020 Report Share Posted June 9, 2020 There is a pin at the bottom of the transom mount that stops the the engine from trimming too far under and yours may be set to high. Quote Link to comment Share on other sites More sharing options...
Pabel1993 Posted June 9, 2020 Author Report Share Posted June 9, 2020 10 minutes ago, jh141 said: The Tilt Piston Nut torque is 70 foot Lbs. The size of the balls is critical it looks like. Not sure what else you you ask. " deal stack " Well I imagine there’s my problem cause I’m no where near torqued to 70 and the balls are definitely bigger.. I meant seal stack *** autocorrect Quote Link to comment Share on other sites More sharing options...
Pabel1993 Posted June 9, 2020 Author Report Share Posted June 9, 2020 9 minutes ago, MuddyBottomBluz said: There is a pin at the bottom of the transom mount that stops the the engine from trimming too far under and yours may be set to high. Oh gotcha I’ll check into it at the very least my motor trims to high Quote Link to comment Share on other sites More sharing options...
Pabel1993 Posted June 9, 2020 Author Report Share Posted June 9, 2020 Next question anyone have a part number for that absorber with the balls and spring in it Quote Link to comment Share on other sites More sharing options...
jh141 Posted June 9, 2020 Report Share Posted June 9, 2020 2 minutes ago, Pabel1993 said: Well I imagine there’s my problem cause I’m no where near torqued to 70 and the balls are definitely bigger.. I meant seal stack *** autocorrect So, I get my seal kits from https://five-star-marine.myshopify.com They are re builders in Port Richey, Fl. You could give them a call. Never had to call them but See if they could supply you with the correct size check balls. They have great seal kits. The balls do not come in the kit. I can not find a part number for them and I am not confident they come with the piston. Also, what are the condition of your pins holding the unit to the motor. Five Star makes Stainless steel replacement pins that are great. I use their pins and the factory bushing on the pins Quote Link to comment Share on other sites More sharing options...
Pabel1993 Posted June 9, 2020 Author Report Share Posted June 9, 2020 5 minutes ago, jh141 said: So, I get my seal kits from https://five-star-marine.myshopify.com They are re builders in Port Richey, Fl. You could give them a call. Never had to call them but See if they could supply you with the correct size check balls. They have great seal kits. The balls do not come in the kit. I can not find a part number for them and I am not confident they come with the piston. Also, what are the condition of your pins holding the unit to the motor. Five Star makes Stainless steel replacement pins that are great. I use their pins and the factory bushing on the pins Thanks for the help there local for me so that’ll be easy Quote Link to comment Share on other sites More sharing options...
jh141 Posted June 9, 2020 Report Share Posted June 9, 2020 That's Great. Hope they can help, Let me know Quote Link to comment Share on other sites More sharing options...
SouthernWake Posted June 9, 2020 Report Share Posted June 9, 2020 This is actually a great built in feature that allows you to slide over sandbars on lower tides. Quote Link to comment Share on other sites More sharing options...
jh141 Posted June 9, 2020 Report Share Posted June 9, 2020 That's Awesome Thinking !!!! Quote Link to comment Share on other sites More sharing options...
smilemaker Posted June 9, 2020 Report Share Posted June 9, 2020 over the years i have learned the hard way that when dealing with hydraulic everything must be clean, gaskets and o rings in perfect condition and do not substitute parts. pressure and small leaks will cause things to fail. sorry i can't direct you to parts for the ball bearings but Simyamaha.com has always been able to help me. Quote Link to comment Share on other sites More sharing options...
Pabel1993 Posted June 9, 2020 Author Report Share Posted June 9, 2020 Yea I hate hydraulics it’s way to tedious for me I knew deep down when the guy told me to use any size ball in replace for those check valves it wasn’t going to work right Quote Link to comment Share on other sites More sharing options...
Pabel1993 Posted June 9, 2020 Author Report Share Posted June 9, 2020 Anything else I need to know before I redo this lol Quote Link to comment Share on other sites More sharing options...
jh141 Posted June 10, 2020 Report Share Posted June 10, 2020 The Balls must have been just wrong enough to not fit tight in the taper. Oh well....... Quote Link to comment Share on other sites More sharing options...
Pabel1993 Posted June 10, 2020 Author Report Share Posted June 10, 2020 Or I left that nut to lose ? I imagine with 70lbs of torque it limits the amount of movement those check valves have .. regardless I’ll fix both of them Quote Link to comment Share on other sites More sharing options...
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