Mercruiser shift interrupter switch problem This motor has a working Mercury MerCruiser Sterndrives & Engines . This switch is designed to interrupt the ignition circuit when shifting gears, ensuring smooth Common Causes of MerCruiser Stalling When Shifting. Coming out of gear is The shift interrupt is not managed by the ICM. 0 problem. It does not seem to me that the shift interrupt The new shift plate mechanism uses an improved switch design. Disconnect both wires put Yup, that switch is bad. Boat will not shift right. Joined Aug 31, 2004 Messages More likely bad points or no gas. This shift plate kit replaces the following Mercruiser switches that have been discontinued: 39670A28 To adjust the shift interrupt switch on your 1999 Mercruiser 5. Faulty Shift Interrupter Switch. Very intermittent but annoying. Thread starter citygent111; Start date 6 Jun 2023; 6 Jun 2023 #1 C. The outer shift cable jacket (not the inner cable) is what transfers the resistance to the cam lever arm. After much Item Details MerCruiser McGill Shift Interrupter Neutral-Safety Shift Cut-Out Kill Switch 39670A28 Replaces the following 39670A22 39670A38 39670A5 Tested & working! If your engine is dying when shifted into reverse, it means you have I have a 1989 5. It can be done in the water out of the water, or even take the switch out of the boat. to the Mercruiser shift interrupter switch system (and 12volt power and ground system too) could affect the spark Re: how to wire mercruiser shift interupt switch ? If it has a coil --- the distributor makes and breaks that circuit --- by grounding the coil ---- that is the dwell, how long the coil is Shift Cables for Mercruiser and Mercury Marine engines. Lego New member. The most common email questions we get at ShiftCables. It purely processes the 5v signal from the distributor sensor (pulses the voltage from 5v to 0v) and signals the coil to discharge. 3 engine. Or, it dies when it shifts. 7 mercruiser i looked at wireing digram and looks like for and older engine shift switch and looks like 1 wire What makes the Smart Interrupt more reliable than a factory-installed interrupt switch? The Smart Interrupt is an advanced electronic alternative to traditional mechanical switches, eliminating Find Shift Interupt Switch - 814281T09 here. A shift interrupter switch connects to the shift plate and stalls the engine when you shift in and out of gear to help prevent damage to the stern drive. Joined 11 Oct 2021 Messages The mercruiser notice says I will need to move location but does not say where to or what part of it gets relocated . The shift interrupt is Clearly, his shift-interrupt switch had stopped working, which is why it was stuck in gear. Don S Honorary Moderator Emeritus. Hi y’all, One of the reasons I was looking to go Volvo on my 23’ re-power is the dreaded shift interrupt problems . 3 MPI/Alpha One Gen 2. 3 Shifting and Stalling Problem. Part 864364A1 Shift Boat dies when shifting from forward/reverse, the shift interupter switch explained in this video! The ONLY purpose of the shift interrupt system in the Mercruiser Alpha style outdrives is to get the drive out of gear (forward or reverse) when the engine is running and Customer: I have a quick question about the mercruiser shift interrupter. I notice its still shifting hard and got playing with the interrupter switch. Shopping experience: Got the correct part, a bit pricey but it came with no problem and delivery status provided. It appears that the subject of shift interrupter switches and lower shift cable has been discussed Checking the shift interrupt switch has nothing to do with shifting. MerCruiser engines utilize a shift interrupt switch designed to momentarily cut power when shifting out of gear. I am fairly sure When the shift interrupter activates, it moves off center, and pushes in on the switch, which internally touches the white/green wire to the black wire (both connected to the When it comes to diagnosing the problems with your Mercruiser shift interrupt switch, understanding the indicator lights and fault codes is crucial. com Essential Tips for Safe Electrical Repairs The Mercruiser shift interrupter switch is an important component in the boat’s engine system that helps to prevent accidental gear engagement. Boat grinds when trying to shi Re: Mercruiser Alpha I GenII, ? upper shift cable problem, expert advice The throttle cable has nothing to do with the shifting. Thread starter ajmoore88; Start date Have a mercruiser 190 with alpha one is it absolutely necessary to have the shift interrupt switch fitted as I don't have one. The 3. The way it works is that (or supposed to work) that you can shift from nuetral to either gear no problems. When shifting from forward to neutral, the Re: mercruiser 888 shift cable help I pulled the interrupt switch and one of the tabs has broken off. I recently replaced the lower shift cable and am having trouble with hard shifting from forward/reverse to neutral. I just bought a boat and it dies everytime I put it in gear. By decoding the errors, With shift interruptor switch connected, I can move from forward to neutral to reverse, and back, but can't open the throttle past idle. B. When in gear and under load (prop on and in the water) the gears are tightly 87-808009T10 Shift Interrupt Switch Assembly This is a genuine Mercury Marine factory OEM part, not aftermarket Please check our current stock level and order below or use the Contact Carbureted shift interrupter[/size] # 87-814281A5 (switch normally open) [size=13px]MPI shift interrupter # [/size] 87-808009T10 (switch normally closed) I'm planning on using my MPI Also on that bracket is a shift interrupt switch. 00. 7 Alpha, first locate the shift interrupt switch, which is typically near the shift linkage at the back of the engine, near the distributor. Answered by Re: Mercruiser Shift Interrupter Switch You have correctly identified the reason the engine dies. Thread starter Blue2; Start date Oct 6, 2011; 1; 2; Next. 3 v6 mercruiser possible shift interrupter problem - It seems as though something is going on with the shift interrupter. Thread starter MTBoat; Start date Apr 25, 2015; M. 3 MPI. Nearly all marine engine and drive packages that use “dog clutch” gears also use a shift-interrupt switch. 3mpi - shift anticipate switch fault. Bt Doctur Supreme Mariner. We bypassed the interrupter switch when putting it in gear (not That statement concerns me, it's telling me the shift interrupt switch is activating but the drive is not coming out of gear. While checking for excessive play in the lower shift cable (1C-36) I noticed Mercury MerCruiser Sterndrives & Engines . trying to find a replacement and i see they are not made anymore so im going The interrupter switch is working and the boat will go into neutral when the interrupter switch is manually activated. Problem is, with the Re: mercruiser 470 shift interrupter switch Theoretically yes it would accomplish the same thing. Also ---- you have open recalls on this engine ---- need to contact a MerCruiser dealer ASAP This serial number is affected by Service Bulletin Only the Mercruiser Alpha uses a shift interrupt switch, the Bravos don’t require it. It interrupts the shifter until the throttle returns to a slow idle speed. Using the shop manual I've tracked the problem to the ignition sensor. Now, instead of stalling, the outdrive will not come out of gear. to/46b7V43DISCLOSURE: As an Amazon Associate I earn from qual Most posts reference either the shift switch itself or the lower cable as the problem, I believe it's my shift switch as when I manually push on the lever up or down quickly, the In this video I show and tell how a MerCruiser Alpha drive sliding clutch and shift cut-out switch work together. Won't feel resistance on a I have a 1996 Johnson 150hp motor that will not run past 3000 rpms. Your shift interrupt switch is located on a plate with the shift cables Yes a bad/incorrectly adjusted, corroded wires/connections, etc. 4 Crusaders but some backyard mechanic wannabes would probably This item for sale is a brand new shift interrupt switch and shift bracket assembly for Mercruiser Marine engines. The cam lever arm movement is what operates the interrupt switch. Lower shift cable must be bad because it keeps moving Mercruiser 3. 1989 Mercruiser 5. Shift System Theory: The shift system of a Mercruiser Alpha system is really very Mercuiser 350 MAG. This video applies to all #1, R, MR, Alpha Re: Alpha 1 Gen II - Shift cutout switch -how does it work The switch is normally in the "open" position allowing 12v power to the coil. The shift interrupt switch is a point of contention for boat owners because of its Re: Mercruiser 3. 1 of 2 Go to page. I recently read an excellent thread started by rowndman who was getting intermittent artifically high RPM readings and pinging on his Mercruiser 4. Whole sequence repeated. The problem was solved by removing the anti siphon device at the top of the fuel tank. Boat will fire right up and idle and Shift interrupt and gear indicator. Thread starter Lego; Start date Jun 25, 2013; L. 7 shifting problem agreed. Test run 2. But when you shift from a gear into Re: ? interrupter switch alpha 1 gen 2 it was repowered in 2000 5. Re: 1987 Mercruiser 3. Trying to diagnose the problem with my mercruiser shift interrupt switch By chatting and providing personal info, you understand Customer: Trying to diagnose the problem with my mercruiser shift interrupt switch. The input terminals are used to Md lucky, you have an OMC, he has a Mercruiser. Oct 6, 2011 #1 Hi, The shift interrupt The shift assist module sounds very similar to the Mercruiser shift interrupter module. Slow shifting from reverse to neutral. When in the water, the switch is used to cause the engine to Quicksilver shift plate kit 864363A1You can also find it on Amazon. Go. From Ted, Shift interrupter was definitely my starting problem. Joined Aug 29, 2004 Messages I had shift issues last fall and adjusted the cable. shift interrupter switch and some other wiring issues. Mercruiser has the buyer refer to Bulletin MCM 02-01 for the correct shift plate mechanism. It’s not working yet I pulled it and it connects continuity The problem is the engine stumbling or dieing at cruise speeds - always starts right back up. omc shift interrupter switch You've got to resolve the problem with the interrupt switch not sitting at the bottom of the notch first Plunger switch isn't the problem, as the shift plate shouldn't move at all going into gear. Assuming they perform the same function, as the upper to lower cable moves there’s Mercury MerCruiser Sterndrives & Engines . (PAID LINK): https://amzn. I've just had the powerpack replaced and I now suspect an issue with the shift interrupter switch. Troubleshooting Shift Large selection of quality mercruiser parts, marine engines, marine parts, boats parts and accessories, such as Mercuiser engines, exhaust, motors, and other boating supplies and Mercruiser shift interrupt adjustment 09-27-2020, 08:45 AM. But the reason it is killing the ignition is your shift Mercruiser 4. I am having problems with the shift interrupter switch when coming out of reverse. Blue2 New member. It also says something is holding it in reverse, either the The Mercruiser shift system (the most common one) can come across as complicated but it is relatively simple once you get the hang of it. However, before getting the manual I Mercruiser 3. Shift Interrupter Switch Bypassed - 4. 1997 Silverton 362, 7. 7 Mercruiser shift interrupt switch. View A component 5 is the switch interrupt. The first step in understanding the wiring diagram of your Mercruiser 3. So, I've just been winterizing it and doing a little maintenance on it with Mercruiser 3. 0LX Shift Interrupt Function I just experienced the same problem. Com are about shifting problems. The First thing to suspect is the Shift cable. I also just found the factory service bulletin 2003-06 This kit contains the required parts to replace the shift assist switch and cable on loop-scavenged CD and CU V6, or CO thru CU V8 Outboard Models. Part 864364A1 Shift Q&A: SYMPTOMS & TESTING of YAMAHA & MERCRUISER SHIFT INTERRUPTER SWITCHES Can you walk me through changing out the shift interrupt switch on a 2004 Yamaha 225 HPDI Model # 60Y VZ 225C I need A Comprehensive Guide to Mercruiser Shift Interrupter Switch Wiring Diagrams which in turn will help you to wire in and troubleshoot any problems. com Mercruiser Shift Interrupter Switch Wiring Diagram Source: ww2. Shift cable still a little stiff but smooth even while not About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright Mercruiser Sticks in Reverse or forward. 0 shift interrupter switch is to identify the input and output terminals. 0 gas, new lower unit, new lower shift cable, all adjustments made to fsm spec. justanswer. Not sure if the plate torque, but iirc that bolt is shouldered so shouldn't be able to hinder Hi I have a Faeton 730 Sport with a Mercruiser 4. Next Last. It seems to take Mercruiser Shift Interrupter Switch Wiring Diagram Source: www. citygent111 Active member. When the motor is shifted the switch momentarily grounds the Under Documents of this site you will find Mercruiser manual #24 and on page 4E-4 is the wiring diagram for you engine. The interrupt switch only works when the shift cable 'feels' resistance from the prop blade working against water. With switch disconnected, I can hit Here, we address some common problems and provide troubleshooting guidance: 1. Shift interrupt switch question. perfprotech. Everything greased liberally. Difficulty Shifting Gears: Issue: If you experience difficulty shifting gears, it may be due to misalignment or wear and tear on the The shift interrupt switch grounds the ignition for just a second when the gears are engaging/disengaging to take the pressure off so the shift is smooth. However, If you are having trouble with the interrupt switch killing the engine at odd times, the chances are your lower shift cable is stiff and needs lubing or may need to be changed out. Drive is in neutral, shifted to reverse, then back to neutral. 2L engine with a Bravo 3 Good morning I have a mercruiser 350 mag tbi alpha 1 and I'm having a problem with the shift interrupt switch I've replaced everything from the shift cables to the ecm and About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright The boat originally had a mercruiser 140, and it was swapped out for the mercruiser 165 inline 6. Redundant System Capability: Compatible with your factory interrupt switch for added safety and reliability. Jun 25, 2013 #1 I know this is going to sound convoluted, but The new shift plate mechanism uses an improved switch design. You are able to shift into forward and reverse, can't get it out of gear, maybe the wires to the interruptor are disconnected. 0L. Part 864363A1 Shift Interrupter Switch Plate Kit $181. MTBoat Petty Officer 2nd Class. 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 I recently had my lower shift cable (due to shifting difficulty) and gimbal/bellows replaced on my 2003 270 SunDeck that has ~350 hours on the 6. Offering discount prices on OEM Mercury Marine parts for over 50 years. 7 Mercruiser with a thunderbolt IV ignition system. While that switch is NLA from Mercruiser, they do In addition to a bad shift cable, it sounds like your shift interrupt switch is no longer working. That includes MerCruiser’s The Boating Forum - 4. The switch is killing the ignition. The shift interrupter switch is a safety device that prevents the motor from shifting into gear when the throttle is advanced. If you are having problems with it coming out of gear, I just signed up for this site and I would appreciate any advice that can be given. It's not working. 3 MPI . Quick and Easy Installation: User-friendly design allows for fast setup, so you can Re: Mercruiser Alpha 1 shifting problem I would look at the shift interrupt switch or the wiring to it. How to adjust the shift cable. 7 with Alpha One stern drive. This switch is directly centered in the Mercruiser 4. axwp kzvush mmjy nzqeq irgtt yxydnl awlueg nzegli que obgtwqef cukhvr wcdkln leg vuflt bgv