I am a marine technician recent grad of mmi. Looking for any suggestions to make the task of aligning a 350 chevy V-drive easier.I was told the best spec. was .002", and is this a two thousanths difference at all measurement points? Or is it a tolarance between say three points? when the engine was pulled I never changed any of the mount adjustments. The boat is in the water, and the engine was pulled to do some transmition work i guess time,patience and alot of adjusting will do it but i cant understand why it is out of alignment when I never changed any motor mount positions.
2007-08-25 12:48:23 · 7 answers · asked by recoyle3 2 in Cars & Transportation ➔ Boats & Boating
I go to Iboats dot com and enter the forum any time I have a question, they always help me out
2007-08-26 01:02:08 · answer #1 · answered by MR. T. 6 · 0⤊ 0⤋
Take the coupling apart insert 3 thou= feeler slide it around the coupling if it feels the same drag then it fine.if loose on 1 side or corner adj mounts to fit.then rotate the shaft 180 deg an trans an check again.If it's the same than your OK if not than adj again> If you can't align than shaft could have a bend in it >or a high spot on the coupling > there can not be any rust on the couplings face or adj will not be possible> I have spent as much as 3 hours to get it perfect. From 1 cyc 10 hp to 750hp 892 detroits. Have 3208 cats in my boat.Also if the cutlass bearing is warren or loose or it's been sitting for a long time with the trans out the weight of the shaft not supported will egg shape the cutlass bearing . Get it close an run for a while them align the shaft.An the boat needs to be in the water to get it correct>>Not on a trailer. Or dry dock?????
2007-08-25 13:10:00 · answer #2 · answered by 45 auto 7 · 0⤊ 0⤋
Every time an engine or reduction gear is removed and reinstalled it must be re-aligned.
0.002" is good, less is better.
No matter how carefully you remove and install the engine/gear you will not get it back in the exact same spot.
The two half male/female couplings should be as close as you can get them, or reduction gear rear seals, stuffing box packing, stern bearing (cutless bearing) will not last very long, also you will have a vibration that you cannot get rid of. When the couplings are bolted together and they are not in-line then the shaft will have to flex putting stress on all components.
35 years of commercial fishing and outfitting commercial vessels of all size and horsepower.
2007-08-25 18:21:50 · answer #3 · answered by Frank N 5 · 0⤊ 0⤋
Glad you are not aligning my drives. If you just got out of school , how come you don`t remember? It doesn`t matter if you pulled the motor or not. You are installing it for the customer. Line it up according to specs. If you are not sure, Ask. Remember. There are no stupid questions, Only stupid answers. Good luck in your career.
2007-08-25 13:00:36 · answer #4 · answered by Anonymous · 0⤊ 2⤋
No more than 002 is good with reading at three spots
2007-08-25 22:59:05 · answer #5 · answered by paultech6 4 · 0⤊ 0⤋
I will suggest you get a job. "Experience comes from starting".
Above sounds like a good thing.
Now I ask, on and sailboat; "How you install an engine under the cockpit and is splayed off to port to clear the heel of the mizzen mast and also to be in a most efficient situation"? You figure that out and you be good to go. ;-)
2007-08-25 13:33:02 · answer #6 · answered by Snaglefritz 7 · 0⤊ 2⤋
are you saying there is definitely an alignment issue? it really should be a simple move to replace the engine and align it. it's time to grab that tech manual and read it.
2016-05-17 22:57:35 · answer #7 · answered by jaimie 3 · 0⤊ 0⤋