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#1
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My 1985 Mercury 75
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#3
posted to rec.boats
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My 1985 Mercury 75
On 5/23/2016 11:33 AM, Ryan P. wrote:
On 5/23/2016 10:06 AM, Justan Olphart wrote: On 5/23/2016 10:46 AM, wrote: On Mon, 23 May 2016 08:33:24 -0500, "Ryan P." wrote: On 5/17/2016 1:48 PM, Ryan P. wrote: There was great debate over whether to lower the engine a peg, since now it sits a little higher when vertical, but with the additional setback (about 7") and additional down tilt, we figured the water would be quiet enough to give me good performance. I can always lower it a notch if I don't like the way it performs this weekend. And the answer is... I don't like the way it performs. Oh, it gets on plain super fast, but now I have a HARD pull to the right. I know I should be able to tilt the motor back up to about vertical, but now at cruising speed, vertical brings the prop up too high and I get excessive revving. Am I right in thinking that the hard pull is because the motor is tilted in too far? Will lowering the motor a inch (or two) actually alleviate the problem by letting me tilt out farther? Thanks! Have you tried adjusting the trim tab? That might help but I suspect he's getting bow steer. He needs to lower the motor and make sure he has some bow lift and the bow wake starts about 1/3 of a boat length from the bow. Once he has that he can tweak for the performance he wants. So that being said, if I had neutral steering before I added the 7" setback from the power tilt unit, Do I need to drop the motor down 1" to make it equal with its height prior to the modification, or do I need to drop it farther? There's no formula. It's all trial and error. |
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#4
posted to rec.boats
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My 1985 Mercury 75
On Mon, 23 May 2016 11:59:45 -0400, Justan Olphart
wrote: On 5/23/2016 11:33 AM, Ryan P. wrote: On 5/23/2016 10:06 AM, Justan Olphart wrote: On 5/23/2016 10:46 AM, wrote: On Mon, 23 May 2016 08:33:24 -0500, "Ryan P." wrote: On 5/17/2016 1:48 PM, Ryan P. wrote: There was great debate over whether to lower the engine a peg, since now it sits a little higher when vertical, but with the additional setback (about 7") and additional down tilt, we figured the water would be quiet enough to give me good performance. I can always lower it a notch if I don't like the way it performs this weekend. And the answer is... I don't like the way it performs. Oh, it gets on plain super fast, but now I have a HARD pull to the right. I know I should be able to tilt the motor back up to about vertical, but now at cruising speed, vertical brings the prop up too high and I get excessive revving. Am I right in thinking that the hard pull is because the motor is tilted in too far? Will lowering the motor a inch (or two) actually alleviate the problem by letting me tilt out farther? Thanks! Have you tried adjusting the trim tab? That might help but I suspect he's getting bow steer. He needs to lower the motor and make sure he has some bow lift and the bow wake starts about 1/3 of a boat length from the bow. Once he has that he can tweak for the performance he wants. So that being said, if I had neutral steering before I added the 7" setback from the power tilt unit, Do I need to drop the motor down 1" to make it equal with its height prior to the modification, or do I need to drop it farther? There's no formula. It's all trial and error. I usually use a sharpie pen and mark which way it was pulling at each adjustment I try. After a few tries you can get a pretty good guess which one is the best compromise. I usually want it nulled out at around 4000 RM add the best trim. |
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#5
posted to rec.boats
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My 1985 Mercury 75
On 5/23/2016 3:27 PM, wrote:
On Mon, 23 May 2016 11:59:45 -0400, Justan Olphart wrote: On 5/23/2016 11:33 AM, Ryan P. wrote: On 5/23/2016 10:06 AM, Justan Olphart wrote: On 5/23/2016 10:46 AM, wrote: On Mon, 23 May 2016 08:33:24 -0500, "Ryan P." wrote: On 5/17/2016 1:48 PM, Ryan P. wrote: There was great debate over whether to lower the engine a peg, since now it sits a little higher when vertical, but with the additional setback (about 7") and additional down tilt, we figured the water would be quiet enough to give me good performance. I can always lower it a notch if I don't like the way it performs this weekend. And the answer is... I don't like the way it performs. Oh, it gets on plain super fast, but now I have a HARD pull to the right. I know I should be able to tilt the motor back up to about vertical, but now at cruising speed, vertical brings the prop up too high and I get excessive revving. Am I right in thinking that the hard pull is because the motor is tilted in too far? Will lowering the motor a inch (or two) actually alleviate the problem by letting me tilt out farther? Thanks! Have you tried adjusting the trim tab? That might help but I suspect he's getting bow steer. He needs to lower the motor and make sure he has some bow lift and the bow wake starts about 1/3 of a boat length from the bow. Once he has that he can tweak for the performance he wants. So that being said, if I had neutral steering before I added the 7" setback from the power tilt unit, Do I need to drop the motor down 1" to make it equal with its height prior to the modification, or do I need to drop it farther? There's no formula. It's all trial and error. I usually use a sharpie pen and mark which way it was pulling at each adjustment I try. After a few tries you can get a pretty good guess which one is the best compromise. I usually want it nulled out at around 4000 RM add the best trim. Excellent idea. Thanks! |
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#6
posted to rec.boats
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My 1985 Mercury 75
On 5/23/2016 10:59 AM, Justan Olphart wrote:
On 5/23/2016 11:33 AM, Ryan P. wrote: On 5/23/2016 10:06 AM, Justan Olphart wrote: On 5/23/2016 10:46 AM, wrote: On Mon, 23 May 2016 08:33:24 -0500, "Ryan P." wrote: On 5/17/2016 1:48 PM, Ryan P. wrote: There was great debate over whether to lower the engine a peg, since now it sits a little higher when vertical, but with the additional setback (about 7") and additional down tilt, we figured the water would be quiet enough to give me good performance. I can always lower it a notch if I don't like the way it performs this weekend. And the answer is... I don't like the way it performs. Oh, it gets on plain super fast, but now I have a HARD pull to the right. I know I should be able to tilt the motor back up to about vertical, but now at cruising speed, vertical brings the prop up too high and I get excessive revving. Am I right in thinking that the hard pull is because the motor is tilted in too far? Will lowering the motor a inch (or two) actually alleviate the problem by letting me tilt out farther? Thanks! Have you tried adjusting the trim tab? That might help but I suspect he's getting bow steer. He needs to lower the motor and make sure he has some bow lift and the bow wake starts about 1/3 of a boat length from the bow. Once he has that he can tweak for the performance he wants. So that being said, if I had neutral steering before I added the 7" setback from the power tilt unit, Do I need to drop the motor down 1" to make it equal with its height prior to the modification, or do I need to drop it farther? There's no formula. It's all trial and error. Alright... Sounds like I should lower the motor so that when vertical, it is at its original depth from before I installed the power tilt. If I still have some pull, I'll play with the trim tab. If it pulls to the right, I need to adjust the tab counterclockwise, correct? |
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#7
posted to rec.boats
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My 1985 Mercury 75
On Mon, 23 May 2016 15:40:06 -0500, "Ryan P." wrote:
On 5/23/2016 10:59 AM, Justan Olphart wrote: On 5/23/2016 11:33 AM, Ryan P. wrote: On 5/23/2016 10:06 AM, Justan Olphart wrote: On 5/23/2016 10:46 AM, wrote: On Mon, 23 May 2016 08:33:24 -0500, "Ryan P." wrote: On 5/17/2016 1:48 PM, Ryan P. wrote: There was great debate over whether to lower the engine a peg, since now it sits a little higher when vertical, but with the additional setback (about 7") and additional down tilt, we figured the water would be quiet enough to give me good performance. I can always lower it a notch if I don't like the way it performs this weekend. And the answer is... I don't like the way it performs. Oh, it gets on plain super fast, but now I have a HARD pull to the right. I know I should be able to tilt the motor back up to about vertical, but now at cruising speed, vertical brings the prop up too high and I get excessive revving. Am I right in thinking that the hard pull is because the motor is tilted in too far? Will lowering the motor a inch (or two) actually alleviate the problem by letting me tilt out farther? Thanks! Have you tried adjusting the trim tab? That might help but I suspect he's getting bow steer. He needs to lower the motor and make sure he has some bow lift and the bow wake starts about 1/3 of a boat length from the bow. Once he has that he can tweak for the performance he wants. So that being said, if I had neutral steering before I added the 7" setback from the power tilt unit, Do I need to drop the motor down 1" to make it equal with its height prior to the modification, or do I need to drop it farther? There's no formula. It's all trial and error. Alright... Sounds like I should lower the motor so that when vertical, it is at its original depth from before I installed the power tilt. If I still have some pull, I'll play with the trim tab. If it pulls to the right, I need to adjust the tab counterclockwise, correct? I believe you are correct. -- Ban Krausescheiße-spouting narcissists...not guns! |
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#8
posted to rec.boats
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My 1985 Mercury 75
Ryan P. wrote:
On 5/23/2016 10:06 AM, Justan Olphart wrote: On 5/23/2016 10:46 AM, wrote: On Mon, 23 May 2016 08:33:24 -0500, "Ryan P." wrote: On 5/17/2016 1:48 PM, Ryan P. wrote: There was great debate over whether to lower the engine a peg, since now it sits a little higher when vertical, but with the additional setback (about 7") and additional down tilt, we figured the water would be quiet enough to give me good performance. I can always lower it a notch if I don't like the way it performs this weekend. And the answer is... I don't like the way it performs. Oh, it gets on plain super fast, but now I have a HARD pull to the right. I know I should be able to tilt the motor back up to about vertical, but now at cruising speed, vertical brings the prop up too high and I get excessive revving. Am I right in thinking that the hard pull is because the motor is tilted in too far? Will lowering the motor a inch (or two) actually alleviate the problem by letting me tilt out farther? Thanks! Have you tried adjusting the trim tab? That might help but I suspect he's getting bow steer. He needs to lower the motor and make sure he has some bow lift and the bow wake starts about 1/3 of a boat length from the bow. Once he has that he can tweak for the performance he wants. So that being said, if I had neutral steering before I added the 7" setback from the power tilt unit, Do I need to drop the motor down 1" to make it equal with its height prior to the modification, or do I need to drop it farther? You may need one of these: http://www.bobsmachine.com/True-Trac...Plates_c36.htm |
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