Is there a way to speed up the tilt/trim operation?

[la350]

I'm putting a '79 150 V6 on one of my commercial fishing skiffs in Alaska. We usually hit the beach at near full throttle to get the skiffs up on the beach and not swamped by the surf. My other skiff has a 55hp Evinrude commercial duty with manual tilt and I just pulled it up as we hit the beach. With this new motor, is there anyway to speed up the tilt cycle? It seems painfully slow...... I don't want it rototilling up the beach!

Thanks,

Lance

 

[AMD Rules]

Re: Is there a way to speed up the tilt/trim operation?

You might want to consider using an alternate (thinner) hydraulic oil in the trim system, especially in your colder climate. The speed may be hindered by the oil viscosity to some extent.

Just be careful to use something compatible with the elastomers in your system. Make sure to flush the existing system completely out, and don't mix.

 

[Texasmark]

Re: Is there a way to speed up the tilt/trim operation?

Other than low viscosity, more hp and faster rpm's would be required.

I like AMD's answer. I am thinking about what defines the lower limit on fluid viscosity and I don't know what that would be. I know that on mating surfaces, like engine bearings, surface tension of the oil means more than viscosity perse. I think the viscosity of the older oils had to be pretty good because the surface tension wasn't all that good......today's synthetic oils blow that concept away.
Viscosity is defined as "the resistance to movement" by my Webster's Collegiate Dictionary so if you want fluid to move fast (with a given driviing force) get it as thin as you can.

Synthetic oil has a flat viscosity index and remains thin at low temps like you can have in Alaska but doesn't breakdown at high temps.

http://www.selectlubricants.com/pds/sl14.asp Is a data sheet (from Select Lubricants Company) for a 15 wt. synthetic oil used in vacuum pumps. (polyalphaolefin which is the base stock used for synthetic automotive lubricants).

This oil doesn't contain all the additives that automotive engine oil would and may be just what you want. The anti foaming characteristic would help to keep your pump pumping fluid and not "air bubbles" which compress and effect your hyd pressure; hence your ability to lift the engine.

The site has a contact address and you might give them an email and tell them of your requirements and they may have just what you want.

I used to use the stuff (PAO) in electronic equipment for a dielectric/coolant. Worked great for the temp extremes encountered in airborne situations.

HTH

Mark

 

[Texasmark]

Re: Is there a way to speed up the tilt/trim operation?

Other than low viscosity, more hp and faster rpm's would be required.

I like AMD's answer. I am thinking about what defines the lower limit on fluid viscosity and I don't know what that would be. I know that on mating surfaces, like engine bearings, surface tension of the oil means more than viscosity perse. I think the viscosity of the older oils had to be pretty good because the surface tension wasn't all that good......today's synthetic oils blow that concept away.
Viscosity is defined as "the resistance to movement" by my Webster's Collegiate Dictionary so if you want fluid to move fast (with a given driviing force) get it as thin as you can.

Synthetic oil has a flat viscosity index and remains thin at low temps like you can have in Alaska but doesn't breakdown at high temps.

http://www.selectlubricants.com/pds/sl14.asp Is a data sheet (from Select Lubricants Company) for a 15 wt. synthetic oil used in vacuum pumps. (polyalphaolefin which is the base stock used for synthetic automotive lubricants).

This oil doesn't contain all the additives that automotive engine oil would and may be just what you want. The anti foaming characteristic would help to keep your pump pumping fluid and not "air bubbles" which compress and effect your hyd pressure; hence your ability to lift the engine.

The site has a contact address and you might give them an email and tell them of your requirements and they may have just what you want.

I used to use the stuff (PAO) in electronic equipment for a dielectric/coolant. Worked great for the temp extremes encountered in airborne situations.

HTH

Mark