??? for don or any one

[bolo789]

hi don what drive is this<br /><br />#0A822020 is it for v8 or ect<br /><br />also what prop # are these?? one 48-13700a4519p<br /> <br /><br /> two # 10315m1415 15<br /><br /> three #033078 1425r12<br /><br /><br />thanks much

 

[Don S]

Re: ??? for don or any one

The drive is a 1987 Mercruiser MC1 <br />You will have to check the drive itself for gear ratio.<br />The 48- prop is a Mirage 15.25 X 19P<br />Have no idea on the other numbers

 

[bolo789]

Re: ??? for don or any one

thanks don for the quick respond, <br /><br />what does mci stand for??<br /><br />also how to find out the gear ratio ??<br /> <br />thanks

 

[Catchem]

Re: ??? for don or any one

Don ,not to be rude ...I read your responses all the time and I am amazed at how you find some of this stuff.Are you a marine mechanic and have your own shop?Hope your around when I need answers for something.Keep up the good work.

 

[Don S]

Re: ??? for don or any one

The MC1 (One) is just Mercruisers designation for that drive, like Alpha I or Alpha I Gen II or MR etc. The gear ratio can be found by counting the teeth on the gears.<br /><br />Catchem<br />Yes, I am a marine mechanic. I have a program on the computer that allows lookup of serial numbers for Merc products.

 

[bolo789]

Re: ??? for don or any one

last ??? lol,. if it is a 5.1 gear ratio will it work on my 1989 merc 5.7L 260 SERIAL# 0C617082 engine?? <br /><br /><br />does rotation of engine makes a diffrent with whatever outdrive one use??/ that all , and thanks for the help don, yu re di man.<br /><br />bolo

 

[Don S]

Re: ??? for don or any one

I'm not sure what is going on with that drive. While it says it's an 87 MC1 drive, Merc didn't use the 1 drives in 87, they used Alpha's, I can only guess that this was a drive manufactured later to fit the older MC1 transom shields. Personally I have never tried to stick an old model drive on a newer transom sheild, so I couldn't say.

 

[bolo789]

Re: ??? for don or any one

oh oh oh well, the word mercury alpha one is written on it in the usial mrec writing. <br /><br />just dont know what to do, <br /><br />kinda stuck right now. <br /><br />thanks again don

 

[rodbolt]

Re: ??? for don or any one

can you post a pic of the drive ?

 

[bolo789]

Re: ??? for don or any one

dont have a scanner rodbolt, all i can say is that it look just like any other alpha one drive the top is flat the cavitation plate is not round it is square, it has the word alpha one on the uper housing . ok so pull of the top cap and count the gear teeth right?? how do i seal back the to , gasket or silocone????will do that in the morning<br /><br />thanks

 

[Don S]

Re: ??? for don or any one

Sounds like it's an Alpha drive, have no idea why Merc calls it an MC1.<br /><br />

how do i seal back the to , gasket or silocone????

If you use silicone, you should be beat about the head and shoulders with a big stick. <br />Mercruiser sells new orings for that purpose. <br /><br />PS: had you looked at a service manual, you would have seen this picture.<br /><br />

 

[rodbolt]

Re: ??? for don or any one

get a rope

 

[bolo789]

Re: ??? for don or any one

ok guys i scratch out what seems to be a ratio # 1.47R I ALSO take the top of and count the gears. the gears closer to the top has 22 teeth the one below it has 21 teeth. <br /><br />so MY ??? is will this fit my MERC 5.7L ???

 

[bolo789]

Re: ??? for don or any one

LOL hey don i saw the ring when i took the top of so no beat over the head an shoulder lol lol thanks

 

[Don S]

Re: ??? for don or any one

Ok, I now know what you have there. It's a replacement drive (BY Mercruiser) for the MC1 drive. It has the newer 1:47R gear ratio like the Newer Alpha I Gen II drives, only in the older drive. It will fit, and the gear ratio is close enough to the 1:50 you normally had.<br />I put the stick away, and guess rodbolt put his rope away also You can take your tubes of silicone and find a carpenter friend and let him have them. There are some specific spots on engines (Not drives and transom shields) that specific types of RTV are recommended. But those are special types for a specific purpose.<br />Both Silicone and Teflon Tape are things way overused and expected by the inexperienced to be the "Duct Tape" or "Swiss Army knife" of sealers, when in fact they both cause more problems than they cure.

 

[bolo789]

Re: ??? for don or any one

so i am good, it will fit the 5.7l right?? <br /><br />thanks again don, and the 1boats gangs for having so much paitient with a nubie boat owner. thanks much

 

[jimmythekid]

Re: ??? for don or any one

slicone is good for... nothing that i can think of

 

[jimmythekid]

Re: ??? for don or any one

p.s. we all were newbies at one time or another