2.5 200 hp merc issue

[Rmohd]

Need a little help, I have a 2.5, 200 hp merc. 94 year ? c is the start of the seial # if that helps. Had it about a year compression was at 120-130 all 6 cyl, oil injection was removed and I mix the oil and gas, was told it had one cylinder sleaved before I got it. (Guy sucked the intake full of water) been a good motor, last trip out I was running about 5k when the motor started to slow and loose rpm and it died, thought it may have some water or a pluged fuel filter, so I pulled hood and checked, all looked good so I hit starter and she wouldnt turn over ?? like it was locked up.. or starter was stalling . waited a min and tried again and she started and ran pretty well the rest of the day, a little rough like she wat loading up or somrthing. mostly 4k to 5k crusing.. upon loading the boat onto the trailer the motor wouldnt push the boat up, she kept laying down and dieing.. its a 21 foot starliner by checkmate. checked compression today and have #1 is @75-80 (#1@75-80) #2 is @130 (#2@130) #3 is @125 (#3@125) #4 is @130 (#4@130) #5 is @110-115 (#5@110-115) #6 is @130 (#6is@130), she still runs and sounds good. so the question, worth having re built, or replace with a freshened power head? or start over and find a nother motor and sell this one as is? I live in mid west by the quad cities and no motor shops, Just dealers.. any constructive help or opinions would be great. as this is my 1st outboard, I like it but hoped for a better expieriance with it..

thanks in advance for any and all help..:confused: :mad:

[dynobo]

Sounds like maybe you got it hot and it started to seize a piston. It's definitely worth rebuilding and if you muster up the desire to do it yourself it will probably be your cheapest way also. You may just need to fix that one cylinder and hone replace rings in the others and BAM!!! new motor. First though you really need to find out why it began seizing the way it did. You do the work and maybe 500.00 job. Used p'head= 2k someone else rebuilds your p'head= 3-4k.

[props4u2]

Sounds like maybe you got it hot and it started to seize a piston. It's definitely worth rebuilding and if you muster up the desire to do it yourself it will probably be your cheapest way also. You may just need to fix that one cylinder and hone replace rings in the others and BAM!!! new motor. First though you really need to find out why it began seizing the way it did. You do the work and maybe 500.00 job. Used p'head= 2k someone else rebuilds your p'head= 3-4k.

Wish I could clear $2,500.00-$3,500.00 rebuilding these things. I take it you haven't bought any parts in the last 15 yrs. or so. If you replace all the parts to do a true rebuild you will be looking @ $3,000.00 in parts and machine work. Doesn't leave a whole lot for labor huh.:)


Lee

[gotboostedvr6]

needs a hone and rings maybe a bore fix it yourself

[wrechin2]

Last time I checked Not all engines need ALL internal componets replaced. Pistons are reusable! Ever heard of a bore gauge or seen the spec page where it says bore if has more than .006 taper or wear in cylinder? The one I built over the weekend had #3 scuffed and was honed and was .004 (3.129)with .001 taper. Still in spec's. There is nothing wrong with boring 1 and reusing the other 5. If all 6 are damaged then yes, I would agree $500 to bore 1 cylinder, 1 new pison and rings for the other 5, and a gasket set (and seals) would be enough if he did the work his self. If I put 3K in parts in all the engines I build I would never build any. I build a average of 4-8 engines a year (stock) and very rarely do all get bored.

Any Yes, he has bought parts in the last 15 Years. There are alot of us dealers on here that are not venders. Such as yourself. I come here for to get info on HP and to offer advise.

RHMOD,
So tear it down and mark everything. Take plenty of pics cause you are not familar with this so, you know where everything goes. Put the rods/ pistons back on the same journal and you will not have to replaced the bearings (if ok). Very common practice and most manuals will tell you to do it this way and explain when you bore 1 cylinder it is not nessesary to bore them all due to a .015 over piston has to weigh the same as standard bore. Just tear it down and see what is needed and go from there.

[allyfreak2]

$3000 in parts:eek: , that is a little steep. just had a 225 promax done for $2600 complete with machine work (all 6 bored .015 over) new pistons, rings, rod bolts, bearings, gaskets, etc. parts were between $1200-1400, labor and machine work was the rest. the parts cost was also with the 30% markup from the mechanic's cost. so i really could have gotten the parts for under $1000 dollars. darn, wish i had a tax i.d.

[Rmohd]

Opened up heads cylinder 1 has a chip on exhaust side of piston and it muct have went down and go into cyliner 5 as it has marks on the top of piston and the head but nothing broke.. cylinder 1 is already sleaved.. do not know of a shop in my area I can use. dealears hear want to put a factoy power head, 4K and some change.. wish i lived coser to some of you or knew someone that could help mw ith this as it would be great to know how to do, tare down and re assemblie are no issue for me its the machine work replacing the rings and rods and pistons and re assemblie of this that I am not wanting to hose up.. you know the important stuff..

[dynobo]

Props4u2, I wasn't suggesting that he could go through and put everything new and do it for 500.00. I gathered from his post that he probably only needed new rings, gaskets, and a piston or maybe two. I'm just trying to help a guy out. I realize that there are some super wealthy peolpe on this board that money is no object for and they can basically have what they want. I am not one of those. I usually only fix what is broke. For a fishin' motor such as he has I wouldn't hesitate to reuse anything that wasn't broke or worn out. My estimate if he does it himself is 1) labor for boring a cylinder 35.00 2) cost of replacement piston 135.00 3) gasket set 115.00 4) 5 sets of rings 28.00 ea. Now maybe he will need other parts I don't know but, these are RETAIL prices I quoted and oftentimes you can buy them even a little cheaper. That 's 425.00 before tax plus maybe GEL SEAL but conceivably it is possible he will be under 500.00 if all his other parts are sufficient.

RMOHD, If you have any mechanical ability you can do the job. Just take good pics. before you start, mark everything so you know where it goes back, have a good set of tools especially a 5/16 12pt socket and a good torque wrench. Any questions you have just don't be in a hurry and post it on this board and somebody will answer it for you. As for the block, if you can't get it done up there PM me and you can ship it to me and I can have it done for you and shipped back probably the next week. The guy who does my blocks has done dozens for me and does a fantastic job. Good luck.

[Rmohd]

Thanks:) , I may give this a try as I dont have money to burn:mad: just a poor pleasure boater trying to give my son some weekend fun:D

[hsbob]

get the merc manual about $50. and go for it. doesnt sound too bad.

[wrechin2]

Email me your address and I will Email you a merc manual on PDF.

[email protected]

Print what you need, get fingerprints on it, and then throw it away.

[props4u2]

Props4u2, I wasn't suggesting that he could go through and put everything new and do it for 500.00. I gathered from his post that he probably only needed new rings, gaskets, and a piston or maybe two. I'm just trying to help a guy out. I realize that there are some super wealthy peolpe on this board that money is no object for and they can basically have what they want. I am not one of those. I usually only fix what is broke. For a fishin' motor such as he has I wouldn't hesitate to reuse anything that wasn't broke or worn out. My estimate if he does it himself is 1) labor for boring a cylinder 35.00 2) cost of replacement piston 135.00 3) gasket set 115.00 4) 5 sets of rings 28.00 ea. Now maybe he will need other parts I don't know but, these are RETAIL prices I quoted and oftentimes you can buy them even a little cheaper. That 's 425.00 before tax plus maybe GEL SEAL but conceivably it is possible he will be under 500.00 if all his other parts are sufficient.

RMOHD, If you have any mechanical ability you can do the job. Just take good pics. before you start, mark everything so you know where it goes back, have a good set of tools especially a 5/16 12pt socket and a good torque wrench. Any questions you have just don't be in a hurry and post it on this board and somebody will answer it for you. As for the block, if you can't get it done up there PM me and you can ship it to me and I can have it done for you and shipped back probably the next week. The guy who does my blocks has done dozens for me and does a fantastic job. Good luck.

Sorry,
I was talking about a true rebuild that would have a warranty, not one that may or may not last. After having a few used pistons spit their locator pins out and having to eat all the parts and labor within a few months of building customer motors, I will not rebuild one without new Mercury pistons. The reason for Mercury is that all mercury parts are guarnteed for 1 year and they will replace other parts damaged by the part that failed, I am told they will pay labor also, we haven't had to see if they would or not thank goodness. I used the undamaged pistons for years also until this happened twice in one year.


Lee


Lee

[wrechin2]

I warranty ALL (except modified) engines for 1 year with the exception of steel reed breakage. I get more business when average people can afford to repair thier engines. Too often most places here try to throw a reman at it 3-4K plus labor and they come to us. Most any supplier will have some warranty and will have a some sort of reinbursement for labor. You may need to find some better suppliers if you can't get a warranty.