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| Hints on Pump Engine Alignment http://www.laidbackboatersboard.com/hints-on-pump-engine-alignment-t215.html |
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| Author: | 78_Tahiti [ May 14th, 2009, 10:47 pm ] |
| Post subject: | Hints on Pump Engine Alignment |
I have replaced the worn U-Joints in my drive coupling for my Panther. I want to make sure I get the alignment correct. Since Panther sets the bell housing on the end of the Pump and most of the adjustment comes from the front mounts. Is it most accurate measuring say balancer bolt to each stringer? Or perhaps using a small version of a framing square on the H-Bar through the small inspection hole in the bell housing. The front cover I have, also has provisions for mounting to the stringers. I was thinking that once I get it set without any vibration, I would use tho 2 mounting points as well. Or is that just kind of redundant? I will post a couple of pics of how its setup this far, so you guys can see what Im seeing, Thanks SMac |
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| Author: | Big Nasty [ May 14th, 2009, 11:53 pm ] |
| Post subject: | Re: Hints on Pump Engine Alignment |
I chaged mine to a 4 point Harmin setup and it feels a heck of a lot better this way I can grease the joints easier I set mine up with a degree gauge it was magnetic and I stuck it on the crank snout and compared it with the pump box to get the correct angle 
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| Author: | 78_Tahiti [ May 15th, 2009, 3:03 am ] |
| Post subject: | Re: Hints on Pump Engine Alignment |
OK, well no pics yet. but i measured from the mounting pad on both stringers to the edge of the brackets bolted to the motor. Im within about a 1/16". Back at the rear I sprayed just a little WD-40 on the rubber ring on the pump snout and let the weight of the rear of the motor settle itself over the pump. I added a piece of 3/16" aluminum plate between the block and the mounting pads of the front mounts. (to get my pan off the floor) and near as I can tell the front of the motor is pointed upwards about 2 degrees. but from front to rear it looks much straighter. from what I can tell without firing it up is the motor looks more correct then it was. I will take a couple of fics tommorow when the sun is out. (in case im way off base and dont realize it) other then that I will be going to CFW Monday (5/18/2009) for a little recreation and test. If any one else is up for it. I should be out on the water by Noon! The first ramp of course. just look for a Tahiti that resembles a Butterfinger Candy Bar. SMac 
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| Author: | 78_Tahiti [ May 15th, 2009, 3:09 am ] |
| Post subject: | Re: Hints on Pump Engine Alignment |
Nasty, how many degrees of difference is the mounting plane in your boat. I have been informed that between 2 and 4 degrees offers best U-Joint like as well as smoothness? SMac |
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| Author: | Cas [ May 15th, 2009, 7:27 am ] |
| Post subject: | Re: Hints on Pump Engine Alignment |
Steve, Don't put a lot of trust in the stringers being straight and centered or should I say, an equal distance away from center. On my old Tahiti, I made a pointer of sorts out of some copper pipe and 1-1/4" pvc I had floating around. I used the pvc to slip over the shaft splines and used a couple of fittings to attach the copper pipe so it extended up past the bulkhead in the front of the engine box to find the center line of the pump shaft. As it turned out, that center line was off by almost a full inch. I also did the plate thing to raise the engine a bit, worked real well to get the 2º. |
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| Author: | Big Nasty [ May 15th, 2009, 8:13 am ] |
| Post subject: | Re: Hints on Pump Engine Alignment |
78_Tahiti_Mini_Day wrote: Nasty, how many degrees of difference is the mounting plane in your boat. I have been informed that between 2 and 4 degrees offers best U-Joint like as well as smoothness? SMac My boat origanally came with an anchor I mean a BBC  When I first installed the BBF I had the wrong pan and it wouldn't allow enough clearance between the Hull/Keel to pan and I had the motor cocked up in the front like 20 dregrees you talk about a mean vidration once I changed the pan to a actual jet boat pan I had the enough ckearance at the bottom. I'm at 3 degrees now. |
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| Author: | 78_Tahiti [ May 15th, 2009, 5:00 pm ] |
| Post subject: | Re: Hints on Pump Engine Alignment |
I think I got it. I both measured and eyeballed the motor. this pick shows the port side mount.  this is the angle of the engine versus pump. Real close to 3 degrees.  Now if it runs smooth, I will fasten the front feet from my timing cover to the stringers too. The H-Bar is more even looking in any position then it was before. time to start it. Thanks for all the input! SMac |
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| Author: | 78_Tahiti [ May 15th, 2009, 8:40 pm ] |
| Post subject: | Re: Hints on Pump Engine Alignment |
Ok Still have a little vibration. It looks like your Right CAS. Even though I am centered in the stringers, the H-Bar tells the story. I believe the nose of the engine is to far starboard from looks of these 2 pics. SMac   Tell me what ya think. |
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| Author: | Performance Jet [ May 15th, 2009, 9:01 pm ] |
| Post subject: | Re: Hints on Pump Engine Alignment |
I use a bubble protractor to set up the center lines. On a Berkeley the pump shaft center line is parallel with the suction case flange. On the engine , the crank center is parallel with the oil pan rail. I use the protractor on these two points and read the difference. As far as the Panther goes, its a little more tricky. With the panther jet there are a few spots on the case and bowl that are parallel with the shaft center. The bearing cap is one of those spots. Are you using a new mount ring on the bearing cap? It looks tired. Usually they are the full width of the mount ring groove and I see too much metal showing in one of your pics. A tired mount ring or a home made one will cause a vibration. Good luck. Jim 
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| Author: | 78_Tahiti [ May 15th, 2009, 10:31 pm ] |
| Post subject: | Re: Hints on Pump Engine Alignment |
JBP thats just the space between the groove edge and the rest of the casting. The rubber is filling the groove and is only about a year old. But I do have another question for you. When installing the H-Bar back in, I swapped the locating blocks for the front mounts back to their original position. I had reversed them when I installed this motor last November. Because it looked as if the bell housing should nearly (completely) cover the the rubber isolator strip. heres a little drawing of now (I think was original) vs How I had it. Im not sure of what side the blocks go on.  heres how I had it. just barely see the edge of the rubber from the back.  The Panther manuel does not specify on what side of the peg the inserts should be on. SMac |
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| Author: | 78_Tahiti [ May 15th, 2009, 10:39 pm ] |
| Post subject: | Re: Hints on Pump Engine Alignment |
Jim, I think what you are seeing is, I took a yellow paint pen and made a line right behind the rubber groove. that way I could make sure I was just covering the rubber, Because I had swapped the locating inserts. (wasnt sure if the pump was gonna be to deep in the bell housing) Bu I swapped them back. it is clamping on about 75 percent of the strip now(not covering it like I had it) |
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| Author: | Cas [ May 15th, 2009, 10:53 pm ] |
| Post subject: | Re: Hints on Pump Engine Alignment |
Steve, Have you checked the pump install? The reason I ask is because I've seen 4 or 5 boats with Panthers where the pump is up to 3º out side to side. Back in the day, Panther would send out the pump and inserts as a matched set. When they gotr to the builders, they'd open the boxes and put the pumps in one section and the inserts in another. When it was time to set the inserts, they would just grab one off the pile and the grab a pump, no more matched set. As far as which way the blocks go, I had the blocks facing the rear as depicted in your second diagram on both my Tahiti/Panther combos. With them installed that way, there was approx 1/8" of the rubber showing on both. Also, on most of the pumps I redid and installed on other boats, that 1/8" was pretty much the norm even with different style motor mounts. The other thing, is the harmonic balancer bolt tight? I found that one out by experience 
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| Author: | 78_Tahiti [ May 16th, 2009, 9:56 am ] |
| Post subject: | Re: Hints on Pump Engine Alignment |
CAS, The balancer bolt is tight. I agree with you on the mounts. It would only seem logical that the bell housing clamp should surround the entire rubber ring as oppossed to 3.4s of it. I checked the pump bolts again too. I think im going to try and lossen the mounts and move the nose of the motor over a little. If that changes the vibration then I will be on the right track. if not. maybe I need to jerk the pump out and reset it. Thanks for the info. SMac |
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| Author: | Cas [ May 16th, 2009, 10:19 am ] |
| Post subject: | Re: Hints on Pump Engine Alignment |
At this point after chasing the vibration with little success, it might be a good idea to disconnect the pump from the engine and then run it. If it vibrates without the pump attached, you know it has to do with the engine or it's mounts. If it vibrates with the pump attached, you will know what to go over with a fine tooth comb. |
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| Author: | 78_Tahiti [ June 2nd, 2010, 4:03 am ] |
| Post subject: | Re: Hints on Pump Engine Alignment |
Well I'm hoping this is where my vibration has been coming from!  This is the bottom of the mounting clamp on the nose of the pump. By the wear mark from the rubber strip on the clamp. I would have say the nose of the motor was to high, and pointing to the right quite a bit.  What you guys think? 
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