When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. As you have a really 'mix'n'match' set up it's really difficult to advice without seeing it. To replace the gimbal housing the engine must come out, no option on that. So please make sure your email address is correct. While I was looking at the engines and gimbal housings, I did some measurements. Hopefully I have enough information here.
I made an interesting find last time I was home. Be sure to enter the category code when looking for part numbers. I have a 1982 Mercruiser 470 as the inboard. Transom plates: The serial number tag is located on the inner transom plate inside the boat; or, on the upper swivel pin. Thanks My first engine is missing the riveted tag at the back of the engine. This manual has been written in a format that is designed to meet the needs of Mercury Marine technicians worldwide. Engine serial number required for purchase.
Used with 350, 357, 377, 383, 5. Keep this manual handy and use it often. The other thing I would not cherish is pulling the motor. Hi, I have spent many hours searching the internet for info to identify my 4 cyl Mercruiser engines. I have a 1986 Renken 21 foot boat with the Alpha 1 Gen 1 gimbal transom assembly gimbal housing, ring, bell housing, etc. Your circumstances or experience may be different.
. We had this unit in our storage as a spare and we are clearing out our marine dealer surplus. Sterndrive Serial Number separate from engine : The serial number tag is located on the upper drive shaft housing starboard side or on the back of the housing. This block was Hecho en Mexico with a cast number 27700 with 87 stamped at the end of 27700. I have to replace my Alpha 1 gimbal housing due to corrosion. Well, I looked at the inner transom plate and it's definitely an Alpha 1 Gen 1.
The shorter yoke still needs to be used on the drive when using an early model in-line engine. You will never be dissapointed with the contents of this engine workshop manual. Unless you have an overhead crane which I don't it's not a fun affair. I'm beginning to think the best thing to do is find a good Alpha 1 Gen 1. If you need a MerCruiser part and are not sure as to the correct part number for your engine, simply with your engine serial number and we will use our expertise to locate the correct MerCruiser part for your application.
There are other issues which preclude you using one generation inner transom plate with the other gimbal housing, so no, you can't do that either. Somebody please point me to the right website. In looking through diagrams and serial numbers for different year ranges for Mercruiser gimbal assemblies, the match I see is that it's from the 470 year range from 1978-1982. I read a post about asking questions the correct way and I want to make sure I am providing the best information possible so that I can get more great answers from the experts! Tech will answer and give them the number off the pad by the fuel pump. Other than that, are the previous generation gimbal assemblies backwards compatable with the Alpha 1 Gen 1 that's currently on my boat? Someone has done some seriously dodgy work to make that happen.
Try to hook up some dodgy bar fastening rig from the older 470 rear engine mounts to the Alpha 1 Gen 1 transom plate. They even told me the original owner's name. In other words, will I be able to use it? If you want to put an Alpha One series engine with that Frankensteined transom assembly, you are going to need to replace the inner transom plate, and anything else that's been botched up to make that lot work. Send an email to and we will be happy to point you at the location of your particluar engine block code stamping. Serial number help Call mercury marine and select the option that says sterndrive questions on their automated answering system.
We had all previously thought that Merc changed enough in 1983 to make the engine mounts and gimbal housings incompatible. The success of Mercury Marine did not occur by chance. Boat Design Net does not necessarily endorse nor share the view of each individual post. And we were not entirely correct. That pledge remains as strong today as ever. In 1974 or 75 Merc changed the drill pattern for the gimbal housing moved a couple of the middle holes up about an inch , and opened the cut out up slightly in the middle. I do have an engine hoist, so if I would only need to lift and suspend the engine a foot or two up while within the boat it wouldn't be as bad.
My boat title lists the Mercruiser 170 serial number A409012, which matches up with the inline 4 Mercury 170. Even the most novice mechanic can also easily follow the step-by-step guides which are made simple by the illustrations and drawings. I know that the exhaust pipe would have to be changed out different o-ring and bolt hole pattern. Re: Engine, Drive and Transom Assembly Serial Numbers I have not confirmed any of these numbers yet. Facepalm to this dilemma I have. MerCruiser part numbers can be difficult to find, even on the internet. Use the Contact Us form at the bottom of the page for any questions.