tilt / trim

[terry 5.2m]

Good afternoon fellow water lovers.

I noticed that my tilt / trim has bleed by. If set to half way it will inevitably drift to the full down position.

Is this a huge concern right now? Meaning if I run the boat with the tilt / trim in the fully titled down position and at WOT am I running the risk of lack of colling to the engine.

Typically I was told just leave it at half way whether idling or WOT.

disadvantages / advantages please.

I had not been in a hurry to fix this as I am still working on my idling issues.

It is more of a pain in the butt when I am loading and unloading the boat.

TIA

Scott

 

[Don S]

Re: tilt / trim

What are you tilting and trimming? It's ok to be specific.

 

[Home Cookin']

Re: tilt / trim

as far as cooling goes, the intake needs to be underwater, so dropping down is going in the right direction. But for an outboard to be too high as far as cooling is concerned, it has to be way up there--seldom an issue.

As far as bleed down, that's more of a convenience issue. In forward the engine pressure is working towards lowering the motor.
If you have trim AND tilt, the trim (short range at the bottom of the motor) is typically strionger and holds against the pressure.

Whoever told you to run your engine half-way down was wrong. How does your boat perform? (unless he meant half-way in the trim range). It's up to you to tune up the trim as you drive based on conditions and load.

 

[foodfisher]

Re: tilt / trim

No advantage. Disadvantages-1) Launching and retrieving PITA. 2) No running sweet spot. 3) Fuel consumption.

 

[Mi duckdown]

Re: tilt / trim

I fit bleeds down you have to figure that out. not right.

 

[terry 5.2m]

Re: tilt / trim

as far as cooling goes, the intake needs to be underwater, so dropping down is going in the right direction. But for an outboard to be too high as far as cooling is concerned, it has to be way up there--seldom an issue.

As far as bleed down, that's more of a convenience issue. In forward the engine pressure is working towards lowering the motor.
If you have trim AND tilt, the trim (short range at the bottom of the motor) is typically strionger and holds against the pressure.

Whoever told you to run your engine half-way down was wrong. How does your boat perform? (unless he meant half-way in the trim range). It's up to you to tune up the trim as you drive based on conditions and load.

My apologies for being vague.

Yes half way in the trim range and I am speaking of my outboard 77 Johnson 115Hp, with power tilt and trim. It most certainly is a PITA when loading and unloading. Luckily I have tilt trim controls aft starboard and bow

As far as performance I would not know as it has bled down since I have owned it....a whopping 4 weeks.

Does an outboard consume more fuel with trim pos all the way down?

I need to check the schematic in my seloc manual but if some one has a clue as to why both the tilt and trim bleed out that would be great. I am guessing it has to be in the motor as everything stems from it.

 

[Home Cookin']

Re: tilt / trim

well I'd start by adding fluid and looking for leaks, Might just be low. use power steering fluid.

I think that's an aftermarket PTT but not sure.

The purpose of the trim is to set the angle of the hull at the best position for load and conditions. If you don't have trim, you shift your load around, and also find which hole the trim bar should be in for best average use.

the purpose of the tilt is for raising the motor for mooring or ramp, and shallow water use.

You speak of "trim range'--does it move in 2 stages: slow at a short distance at the bottom range (trim) and faster at the top and longer distance (tilt)?

 

[southkogs]

Re: tilt / trim

...I think that's an aftermarket PTT but not sure.

I was actually wondering if it was a trim and tilt or just power tilt? My old '72 Evinrude had power tilt (looked kinda' like that unit) but it wasn't power trim. I could tilt up and idle as a shallow water option, but couldn't really run any significant power while tilted. The end result of doing so would have gotten me the exact result you're experiencing.

 

[terry 5.2m]

Re: tilt / trim

well I'd start by adding fluid and looking for leaks, Might just be low. use power steering fluid.

I think that's an aftermarket PTT but not sure.

The purpose of the trim is to set the angle of the hull at the best position for load and conditions. If you don't have trim, you shift your load around, and also find which hole the trim bar should be in for best average use.

the purpose of the tilt is for raising the motor for mooring or ramp, and shallow water use.

You speak of "trim range'--does it move in 2 stages: slow at a short distance at the bottom range (trim) and faster at the top and longer distance (tilt)?

It is a two stage: fast operation for tilt and slows down once it hits the trim range. It also has holes in the mount to adjust the motor position manually. I will try and take better pics tonight but one of the pics I posted shows the holes to which the motor is positioned in the lowest hole. The whole mounting set up seemed odd to me but what do I know. The motor has a spacer between it and the transom and the motor casted U-mount is not actually down touching the transom. The spacer has the motor at an angle, maybe 10deg...refer to pics please.

I do know she runs like a scalded dog at WOT and gets up on plane fast...maybe with in 5 sec or less.

 

[foodfisher]

Re: tilt / trim

Other than the PITA, sounds like your content with it. To fix it and have real control of your experience you're going to have to rebuild the "pump". The motor is working. The separation is evident, the elec. wires go into the motor, the hydraulic tubes go into the pump