Id be getting a copy of the mercruiser service manual for that engine and drive. Check the pivot point on your shift bracket to be certain it moves freely. Perhaps my problem is fixed then because i did adjust the lever a few days. Here is an explanation of how it all works and how to set them up. Mercruiser shift plate kit with interruptor switch 864363a1. Jun 28, 2016 1975, mercruiser 888, ford 302 i am sending this a second time, because the first one went to a ford mechanic tan, the shift interrupt switch works when i move it by hand. When i decided to replace it i took it to a friend that has a boat repair shop in garfield, mn, so i didnt have to adjust the new one. Insert into loopclamp if equipped and secure with mounting screw with sufficient slack for shift lever movement.
Hi yall, one of the reasons i was looking to go volvo on my 23 repower is the dreaded shift. The mercruiser stern drives shift cable connects the driver controls to the shift control plate. The shift interrupt should not cut out the ignition if the cable is in good working order and adjusted correctly. This system provides a reliable and fully adjustable interrupt duration. This will assume that there are no ongoing problems, like stiff cables or excess slack in the shift system. I ended up going mercruiser anyway, and go figure, i cannot seem to get the engine to shift reliably without dying. Smart interrupt mercruiser omc universal electronic shift interrupt switch kit dont get stuck in gear. Yet i cannot figure out this simple shift interrupt switch. The drive shift cable will move a slide mechanism in the bellhousing which in turn will rotate the upper shift lever. I just found the installation manual from when my father bou.
On some of the wiring diagrams regular distributor and coil the negative terminal which serves as the tach signal is also routed to the shift interrupter, im assuming that when shifting forwardreverse the switch temporarily. The shift plate mechanism will then move the drive shift cable. For the following models that have the shift interrupt switch mounted to the top of the aluminum rocker cover, an alternate location will have to be selected for. Pull on the shift cable guide to remove any slack from the cable. Adjust the barrel by rotating it until youve removed the slack. Follow instructions carefully to ensure correct assembly. Most people call the shift interrupter switch the kill switch or shift switch. Lanyard stop switch the purpose of a lanyard stop switch is to turn off the engine when the operator moves outside the operators position as in.
Mercruiser shift interrupt switch if this is your first visit, be sure to check out the faq by clicking the link above. When the shift lever is turned, it rotates the upper, middle and lower shift shafts. Mercruiser shift interrupter switch wiring diagram. Adjust cable barrel so it slips freely into the barrel hold 5. A shift interrupter switch connects to the shift plate and stalls the. Mercruiser 39670a28 shift interrupt engine cutout kill. How to adjust the shift cable and neutral cutoff switch on a mercruiser 260. B temporarily join the engine harness wires together.
Shift plate kit, mercury mercruiser 864363a1 california. Used as a safety device to work as a safety device, the lanyard clip must be attached to the emergency ignition interrupt switch 5 and the lanyard itself must be secured to the boat operator. The purple from the harness goes to the purple on the coil and also jumps to the oil pressure switch and the shift interrupt switch. My shift interrupter switch answered by a verified marine mechanic. Temporarily join the engine harness wires together. The purpose of the interrupter switch is to momentarily disrupt engine ignition when shifting from gear into neutral when theres a load on the prop from water resistance so the gears in the drive can disengage. The quicksilver shifter and linkage on my 1987, alpha 1, 330hp, mercruiser was not pushing the clutch dog far enough to engage the reverse.
If your engine is dying when shifted into reverse, it means you have a bad overstretched shift cable. Mercruiser 199820 clymer stern drive boat engine repair manual. Its not working yet i pulled it and it connects continuity fine with multimeter test. Adjusting your shift cables marine engines and sterndrives. The new switch will not fit the old mounting plate. I remember that the cable makes the shift, and the cable housing makes the ignition interupt. The manual says to spin trunion up to four 4 additional turns in one direction but i do not have that info at hand.
Mar 10, 2011 mercury outboard wiring diagrams mastertech marin. Operation of this circuit is similar to the timing mode operation. How the shift interrupt system works boating forum. I have pulled car motors, repaired heads, diesel injector replacements, pulled my mercruiser engine and replaced coupler. Power tiltremove tilt adjustment stud from gimbal ring. A shift interrupter switch connects to the shift plate and stalls the engine when you shift in and out of. Mercruiser shifting help pleasegctid686683 bayliner owners. Reverse and neutral are good was thinking maybe cable adjustment does the g. Mercruiser shift interrupter neutral kill switch 49646a1. I put the throttle all the way forward and itmakes the kill switch activate and then goes. Marsden smart interrupt 27 photos marine supply store. Do not fail to reconnect these two vere engine damage.
Gm est distributor kit basic power industries, inc. Apr 23, 2008 typically if the shift cutout switch is not being engaged it will be very difficult to shift out of gear. Omc demands that this adjustment be made using two of their special tools see recommended tools for adjusting the cobra shift linkage 76k jpeg. An error occurred while retrieving sharing information. Digital throttle and shift digital throttle and shift dts operating instructions are provided in a separate manual. Sterndrive tools, special tools for mercruiser sterndrives. Item details mercruiser mcgill shift interrupter neutralsafety shift cutout kill switch 49646a1 49646a2 this type of switch was mounted directly to the transom plate and the ends plugged into a terminal.
Bravo iii shift interrupter switch bayliner owners club. Does the boat need to be in water for the shift interrupter switch to work. Mercruiser 3 0 parts diagram, mercury 4 3 alpha 1 engine in addition 3 0 mercruiser wiring harness additionally mercruiser shift interrupter switch diagram furthermore boat wiring harness kit as well yamaha blaster carb adjustment. So i adjusted the cable on the interrupter, that went to the lower unit, so that it had more. This clymer mercruiser 199820 stern drive repair manual provides detailed service information, stepbystep repair instruction and maintenance specifications for 199820 mercruiser alpha, bravo one, bravo two, and bravo three mercruiser stern drive engines. How to adjust a mercruiser shift cable gone outdoors. The switch should stay centered, n not move at all. Adjusting these things can be a pain, and you must follow the prescribed procedure to the letter. Do not fail to reconnect these two wires to the shift interrupt switch when timing procedures are complete. Hi yall, one of the reasons i was looking to go volvo on my 23 repower is the dreaded shift interrupt problems on mercruisers. An alternate location will have to be selected for mounting the replacement shift plate kit. Electronic shift assist esa electronic switch assembly for omc cobra sterndrive engines replaces. There is a simple spring loaded rocker bracket that the micro switch is mounted to. Insert the hydraulic shift unit and tilt switch leads through.
Shop wholesale marine for shift plate kit, mercury mercruiser 864363a1. The replacement switch cable will be routed different than the original switch cable. Have been studying the mercruiser manual and this is what i have come up with. Its a bit confounding that the manual diagram doesnt exactly match mine 89 up. I will consult the service manual and make neccessary repairs. Remove the clevis pin with a set of pliers and disconnect the brass adjustment barrel from the post. When the shift interrupt switch is activated circuit closed the b ic module terminal is energized and the ignition is interrupted. Apr 02, 2011 has anyone had experience hooking up an hei distributor with a shift interrupter switch. The smart interrupt uses a high tech usb sensor to determine the position of your shift cable. I aquired this pristine 1984 chaparral 172 with a mercruiser 140 when i purchased this lake. A number of models did not come supplied with interrupters at all. Mar 09, 2016 mercruiser shift interrupt switch if this is your first visit, be sure to check out the faq by clicking the link above. After years of use, the shift cable tends to stretch causing the need for adjustment and realignment.
If the interrupt doesnt work you have to turn off the ignition to slow forward momentum and you cant switch into reverse without restarting. Refer to cummins mercruiser diesels smartcraft and dts operators manual. I borrowed the merc manual to adjust my original cable. Mercruiser 199820 clymer stern drive boat engine repair.
The models listed following have the shift interrupt switch mounted either on the transom plate or on a shift plate assembly attached at the top of the inner transom plate, with the hydraulic reverse lock valve assembly. Mercruiser shift cable adjustment diagram wiring diagram. The shift cable is the gear cable that runs from the alpha leg through the gimble housing and terminates on a shift interrupt switch bracket, usually mounted somewhere on the engine rocker cover or exhaust riser. The models listed below have the shift interrupt switch mounted either on the transom plate or on a shift plate assembly attached at the top of the inner transom plate, with the hydraulic reverse lock valve assembly. Shift assist switch replacement kit crowley marine. Need help adjusting my shift interrupt switch the hull truth. If the clip is pulled free of the control, the engine will shut down. Jun 28, 2016 mercruiser 260 shift cable neutral cutoff switch adjustment 2 of 2. Has anyone had experience hooking up an hei distributor with a shift interrupter switch. Mercruiser mc1, r, mr, alpha one, gen ii shift system many people ask about the shift cable setup and the shift cutout switch. Mercury marines mercruiser stern drive system consists of the engine, outdrive and operator controls. Please retry this and see if this works first before adjusting any cables.
Not sure if this will help, but the lower shift cable where it attaches to the shift interrupt switch bracket. Mercruiser gm4 service manual pdf download manualslib. If you have the old style swithc do not try and adjust this by bending the arm, replace the complete shift bracket with the new style kit. Adjusting these things can be a pain, and you must follow the. Sounds to me like the shift interrupter switch is malfunctioning, disconnected, or out of adjustment. Bypass the shift interrupt switch by disconnecting wires at shift interrupt switch. Do not fail to reconnect these two wires to the shift interrupt switch when timing procedures are. Shift interrupt switch newbies chaparral boats owners club. Aug 31, 2020 how to adjust the shift on the mercruiser alpha one. How to adjust the shift on the mercruiser alpha one gone.
How to adjust a mercruiser shift cable gone outdoors your. The quicksilver shifter and linkage on my 1987, alpha 1, 330hp, mercruiser was not pushing the clutch dog far. I had shift issues last fall and adjusted the cable. Mercruiser shift interrupt adjustment 09272020, 08. I notice its still shifting hard and got playing with the interrupter switch. When this y plate moves and activates the shift interrupt switch, the ignition coil. The manual says to adjust the cable, etc, so i do this. Mercruiser sells complete shift plate assemblies to replace the old switch and plate. Manual tiltconnect the tilt up cable to the stem drive.
Remove the locknut holding the adjustment barrel in place. The short answer is no, the micro switch interrupter actually engages less when there is no water resistance. The purpose of the interrupt switch is to prevent damage to the drive from the throttle opening before forward or reverse gear is engaged. Io shift cutout switch adjustment, submitted by achris. The only purpose of the shift interrupt system in the mercruiser alpha style. Mercruiser shift interrupt adjustment glasply forum. Mercruiser shift interrupter neutral kill switch 49646a1 120hp 140hp 165hp early. Does the boat need to be in water for the shift interrupter switch to work properly. Jun 15, 2010 i have a mercruiser alpha 1 sterndrive.
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