OE KIT - Latham 571 Tie Bar Kit Oe Kit - Latham 571 Tie Bar Kit
EVINRUDE G2 - TIE BAR KIT INSTALLATION
Install tie bar mounts onto G2 engines using stock Evinrude M-8 tie bar mount holes as follows below. Please note that the SS mount plates that come from Latham Marine will have the clevis bodies already installed. The clevis joints are held in place on the mounts with special flat allen head SS bolts, a spacer, and a half locknut. The clevis bodies will include the cross stud with two nuts, one still loose, to attach the tie bar assembly when required.
Install the Latham G2 tie bar mounts with a single clevis body onto the outside engines with the clevis offset towards the center of the boat. Install the mounts with two clevis joints on center engines only. All mounts are to be installed with the "Latham Marine" engraving visible on top to ensure proper clearance for the bend in the mount. The Latham G2 clevis joints also have an angle on the top side. This side is always to be on top with the flat side on the bottom. This orientation is followed during assembly at Latham Marine. If you remove the clevis from the mount you must make sure to properly re-install with the angled side up, and the flat side down. Again, this is to ensure proper clearance. Please see instructions #568, #569, & #570 for a detailed assembly drawing.
Apply Loctite 271 (red) to threads of supplied SS hex head M-8 heavy duty Latham mount bolts before installation through the base of the Latham G2 SS mounts and into the engines. The special SS tab washers should be installed under the M-8 bolt heads with the one pre-bent tab down and positioned into the small hole beside the main bolt hole in the mount to keep the washer from turning while the bolt is tightened.
Torque the two M-8 bolts per mount to 40.6 Ft.-Lbs. while lining up the tabs of the washers to the hex head flats. Bend up the two free tabs of each SS tab washer against a bolt flat to prevent the bolt from rotating loose.
The last step when installing the Latham G2 SS tie bar mounts is to install safety wire through the pre-drilled holt in the hex heads of the supplied Latham M-8 mount bolts. Please see Latham instruction #525 for a detailed description of the proper safety wire installation. The safety wire is also to prevent the mount bolts from rotating loose.
With the G2 tie bar mounts properly installed onto each engine you can now install the tie bars to the clevis joints. First, you will need to measure your exact engine(s) center to center dimension(s) and then set the supplied tie bars up to match this dimension. At this point all tie bar hardware should just be hand tight.
The Latham tie bar kits for Evinrude G2 engines will include pre-installed SS spacers that
allow tie bar kits with straight bars (three spacers per bar included) to be adjusted by
a maximum length of approx. 3.0". For tie bar kits with bent bars (1 spacer per bar
included), where the center engine is not level with the outside engines by more than 1.5”
in height, to be adjusted by a maximum length of approx. 1.50”.
Remove none, one, two, or three of the ¾” long SS spacers depending on which tie bar assembly you have until you get close to the centers you require. The removal or addition of a spacer will change the overall range of adjustability of the bar by 3/4". For example, if the bar is originally set at the maximum distance of 29" centers, then the removal of a spacer would allow the bar to have adjustability between 28.25" - 29". No matter what the combination of spacers (or lack thereof) the maximum amount of exposed thread can be no more than 3/4". If the bar is at its max range of extension (i.e. a tie bar kit that is mean for a range of 27.5" - 29" is at 29") then the bar should never be extended past this point to ensure proper thread engagement. If more extension is needed, then the next tie bar kit with a higher range should be used. This range of adjustability is only for the adjustable side of the tie bar. For straight bars, the side with the black crush bushing will never show exposed threads. Once you have your exact centers you will need to pre-load the black crush bushing of the tie bar before final adjustment. For straight bars tighten the bar 1/8 turn into the black crush bushing with the rod end while holding the bar in place by the machined wrench flat in the bar. For bent bars, do not proceed with this step until the milled/fixed end of the tie bar is installed.
When installing the tie bars always install the non-adjustable end first. The non-adjustable end of a straight bar is the crush bushing end, and for a bent bar it is the milled/fixed end. Always install these non-adjustable ends on triples and quads to a center mount. For a twin this does not matter. We do this to keep the final tie bar adjustment at the outer engines where it is easy to access.
To install the tie bar to the Latham G2 clevis joint remove the stud from the clevis ear, put the non-adjustable side of the tie bar between the clevis ears, align the holes, & install the stud. When installing the supplied half locknut onto the cross stud tighten the locknut until fully secured. Be sure to not over tighten the stud, as this may restrict the rotational movement of the clevis on the stud which is needed for proper functioning (i.e. no binding). There will be anti-seize on the threads of the stud to prevent galling if removed in the future.
Repeat the above described stud installation at the adjustable/opposite end of the tie bar. Keep the tie bar jam nuts loose (1 jam nut per straight bar; 2 jam nuts per bent bar) while making the final centers adjustment. To fine tune the length of the rod end needed to line up with the outside clevis ear stud holes rotate the rod end and not the bar. Once you have the bar adjusted to the centers you require you can tighten up the half locknut of the cross stud, as previously described above.
To finalize the tie bar installation tighten up the jam nut(s). For the straight bars you can hold the tie bar at the wrench flat and tighten the SS jam nut into the bar until it is fully secured. Make sure not to change the tension you have previously put onto the crush bushing at the opposite end of the straight bar. For bent bars, put a wrench on the wrench flats of the bar, and another wrench on the jam nut next to the crush bushing. Once engaged with the crush bushing rotate the jam nut 1/8" turn into the bar to pre-load the crush bushing. Tighten the second jam nut against the first one, locking them both in place, without allowing it to rotate which would change the pre-loaded tension on the black crush bushing. Everything will now be locked securely in place.
Verify all connections are tight and locked down (all nuts, studs, bolts, etc.) if installed correctly there should be no play anywhere in the linkage.
Please note that if you have any questions or run into any problems please call Latham Marine at 1-800-422-7267. We can go over any issue you may encounter during installation and make sure your tie bar system gets properly installed.