How do you bleed power trim/tilt??

[Mebster]

1999 Mercury XR6 150<br /><br />Motor skeg hit bottom and forced air into trim/tilt system. Loud squeals at times during raise and lower. While lowering there is a 5 second delay before transistion of tilt to trim. This does not happen when I raise the motor. <br /><br />This unit has 1 tilt ram and 2 trim rams. Only openings are fill hole, manual release valve, and a access point to some valve in the pump. Only the manual release is accessable with motor trimed down.<br /><br />I have tried different combinations of raising motor, opening valves, letting sit up/down, but can not seem to find way to get air out of the system.

 

[cinder1995]

Re: How do you bleed power trim/tilt??

You definately don't want to open the bleed valve with the motor trimmed up. That would pull air into the cylinders. You want to lower the motor all the way down and then bleed the air out. Also make sure that there is enough oil in the unit. Trim motor all the way down when putting oil in. Otherwise you'll overfill and blow cylinder packings.

 

[Mebster]

Re: How do you bleed power trim/tilt??

Thanks for the response. I've learned a couple things over the last few days. I guess I'd better share since it seems we have no resident experts in this matter. Buying the manual helps.<br /><br />1) There is no bleed valve. This unit is "self bleeding". You trim it all the way up and down 3-5 times and it should bleed itself.<br /><br />This did not work in my case <br /><br />2) Since I can lift the motor when it is trimmed down, (no reverse lock) I'm going to try the manual release valve and O-rings next. Plastic screw with 3 small O-rings and a retaining clip for $34.70. They should be shot for that! <br /><br />3) Next I will look at the trim piston rod assembly. This has the impact relief mechanics inside. Since this happened after I hit bottom I figured this would be next best candidate. Of course I need to buy a face spanner wrench to do this. Also, Mercury recommends that you replace all O-rings when you do this and the O-ring kit is $51.... for rubber O-rings! <br /><br />4) After that if this was a 2000 I would need to replace the pilot valve assembly, but because this is a 1999 (same for 1998) model I will need to replace the entire pump assembly priced from Mercury at $428. <br /><br />5) After that the whole trim cylinder assembly gets replaced and then the entire trim/tilt unit goes bye bye. Found rebuilt units for $585.<br /><br />Hope I don't have to go that far, but a mans gotta do what a mans gotta do.

 

[clanton]

Re: How do you bleed power trim/tilt??

The small seal on the pilot valve is probley bad, unless something broke inside. Impact valve is spring loaded and should return to correct position after impact. You should be able to remove the valve and replace the seal. The seal number is same as 125 Force, search Force tilt and trim for number.

 

[Mebster]

Re: How do you bleed power trim/tilt??

Clanton<br /><br />After my ranting about this being a 1999 trim unit with no access to the pilot valve, I realized I've already had the entire tilt/trim replaced under warranty. So this is at least a 2000, most likely a 2001 unit.<br /><br />That said, do you know if I need to remove the Tilt/Trim to have full access to the pilot valve assembly or can I get to everything from the access point under the pump?