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Engine mount
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| crbenny |
Posted on 04/21/14 - 3:46 PM
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That depends on the prop you choose. I don't think (I don't know) there are too many performance props for that gearcase. Your current position is roughly where the rest of us start, regarding that hull, and then we go up from there.
Chris
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| JPB |
Posted on 04/23/14 - 9:34 AM
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Thanks guys...I am going to drill the yellow holes as I will have just enough room. This will give this bracket two mounting options.
I am going to order a Stiletto Triad propeller with a 10.5" diameter and a 12" pitch? are there any other suggestions for propeller choice? Remember this is a 40 HP tiller on a 17' hull.
Thanks.
Edited by JPB on 04/27/14 - 11:16 AM |
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| JPB |
Posted on 04/27/14 - 11:22 AM
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I drilled the yellow holes and mounted the engine in the highest position. The yellow holes will allow me to adjust down one hole with this particular mercury bracket. The yellow holes came in just above the bottom of the splash well and I cut the square washers to match. Updated picture on my personal page.
I will lake test the setup this week after installing the new propeller.
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| jw0287 |
Posted on 04/29/14 - 3:08 AM
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Looking forward to reading the results.
Nothing like a Whaler |
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| JPB |
Posted on 05/09/14 - 7:21 PM
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Last week I installed a new stainless stiletto triad prop with a 12" pitch and was able to finally test this engine setup. To recap, this engine is 1999 40 HP two stroke that I recently purchased and converted to tiller steer to be installed on my 17 foot boat. The engine appears to be in pretty good shape, starts easy and idles very well...However the compression is 106-106-97 and sometimes I "think" I can hear the engine ticking.
The engine is mounted all the way up and the cavitation plate is almost 2 inch above the bottom of the keel as pictured in my personal page. Overall I was very pleased with this setup...The boat was quick to plane and was a joy to handle. I noticed with the engine trimmed out that it would begin to suck air in very tight quick turns but otherwise remained planted during the entire test. the last picture on my personal page shows the cavitation plate at WOT.
The maximum RPM for this engine is 5500. I was able to get a WOT 5100 RPM without trimming the motor and saw 31 MPH on the GPS. The boat cruised well at 3950 RPM and 25 MPH.
I would like to thank everyone for the help!
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| JPB |
Posted on 05/09/14 - 7:47 PM
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http://youtu.be/s6U-5dOOmpc
http://youtu.be/fV1YZY4IFSA
Here are 2 short videos of the test. If you listen close you may hear the engine tick that has been driving me nuts...I hope I am just hearing things.
Edited by JPB on 05/09/14 - 8:46 PM |
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| blacksmithdog |
Posted on 05/10/14 - 4:44 AM
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Good looking rig and performance for a 40 on a 17 foot Whaler.
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| wlagarde |
Posted on 05/10/14 - 5:16 AM
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Yes - Very nice performance and boat. It's nice to have a light carbureted 2-stroke motor.
Edited by wlagarde on 05/10/14 - 5:46 AM
1976 Sport 15 w/ 2005 50hp Nissan 2 stroke |
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| Petrus |
Posted on 05/10/14 - 7:14 AM
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Could the noise be propeller rattle
I think I have a similare sound on my engine and it only appeared with the stainless prop.
http://s921.photobucket.com/user/Petr...5.mp4.html
Also read this thread,
http://www.whalercentral.com/forum/vi...rowstart=0
Edited by Petrus on 05/10/14 - 7:19 AM
1997 Montauk 17, Suzuki DF90A |
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| JPB |
Posted on 05/10/14 - 7:58 AM
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Thanks for the suggestion. Prop chatter could very well be what I am hearing. I just went out and pushed in on the prop and it will push in about a quarter of an inch and spring back out. If I do this fast enough it makes a heavy knocking sound.
When I installed the prop I torqued it to 50 pounds and it just started to crush the spacer and I stopped. I am not sure if this has anything to do with it or if the prop was designed to push in on the shaft like I described but this could very well be what I am hearing.
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| wlagarde |
Posted on 05/10/14 - 8:11 AM
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The spec torque for the prop nut on my nissan 50 is around 30 ft-lbs if I recall correctly. 50 sounds high but check with a service manual to see what the factory spec is for your engine.
1976 Sport 15 w/ 2005 50hp Nissan 2 stroke |
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| JPB |
Posted on 05/10/14 - 8:22 AM
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55 pounds for the mercury is what I found...I did not damage the spacer, just felt like if I tightened the nut any more than it would crush...I feel certain that I could not have applied 5 more pounds without damaging the spacer.
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| wlagarde |
Posted on 05/10/14 - 8:26 AM
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Then it sounds like you are good in terms of the torque and spacer.
1976 Sport 15 w/ 2005 50hp Nissan 2 stroke |
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| wing15601 |
Posted on 05/10/14 - 8:32 AM
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When I installed the new Stiletto on the Honda 50 on my 13 Whaler I noticed that the hub was not set deeply enough into the prop until I torqued the nut to specs. It may be worth the price of a washer to see if 5 more pounds of torque would eliminate the problem.
I winter in Ft. Myers and summer in St. Joseph, Michigan. It’s now about 12 years since I’ve joined this group. I gave my 1972 whaler to my daughter and sold the 17’. Bought an O’Day 28 sailboat and sailed on Lake Michigan. Yesterday I bought a 2005 130 Sport. |
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| wlagarde |
Posted on 05/10/14 - 8:39 AM
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Before you add torque and risk damage, pull off the prop and push and pull the prop shaft along its axis to see if the play is within the lower unit rather than being related to the prop.
1976 Sport 15 w/ 2005 50hp Nissan 2 stroke |
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| JPB |
Posted on 05/10/14 - 9:31 AM
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http://youtu.be/juOSU8MineE
I think the hub may not be seated properly. The link shows a video of me pushing in on the prop. Is this normal? Again, I do not feel that I can tighten the Prop nut without damaging the spacer.
Thanks.
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| wlagarde |
Posted on 05/10/14 - 9:41 AM
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Wing15601 is on the right track. Add a stainless washer between the prop and the existing spacer (install thrust washer, then prop, then additional stainless washer, then the aft spacer, and then the nut). Be sure the inner diameter of the washer is large enough to slide over the splined portion of the shaft.
I had this same problem with my solas stainless prop on my nussan outboard and this solved the problem.
Edited by wlagarde on 05/10/14 - 10:01 AM
1976 Sport 15 w/ 2005 50hp Nissan 2 stroke |
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| JPB |
Posted on 05/10/14 - 11:27 AM
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well...I took the prop off to inspect the hub and it appeared to be seated properly. When I loosened the nut I noticed that it did not take much pressure to back it off... but I expected after testing to re-torque the nut.
After inspecting the hub I installed everything and started to tighten the prop nut and the spacer collapsed. It was just barley more than hand tight and no where close to 50 pounds. I will contact precision propeller and hopefully have a solution soon.
I put a picture of the crushed spacer on my personal page.
Edited by JPB on 05/10/14 - 12:08 PM |
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| wlagarde |
Posted on 05/10/14 - 1:28 PM
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So it sounds like the spacer couldn't take the force of 50 ft-lbs of torque. Sounds like maybe it was defective? Good news is it looks like you found your problem.
1976 Sport 15 w/ 2005 50hp Nissan 2 stroke |
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| JPB |
Posted on 05/10/14 - 4:39 PM
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I agree...I was not able to apply the proper torque to the prop nut when I first installed the prop and I think this is the cause for the ticking sound. The prop spacer seems kinda Micky mouse too me...I feel like even when I get another one it will not stand up to 55 pounds of torque. I think I should try a larger tab washer between the spacer and nut. I will update when I get it fixed. Thanks again for the suggestions!
Joey
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