What is model of my Mercury 4Cyl 90HP?

[PHUNG]

I have a Mercury 4 cylinder, 90HP oil injected two stroke engine. The serial tag is lost. Other Info is on lower unit near the propeller: "Model 180 , DOEL-FIN". I need to identify the model and serial number of this motor so that I can place an order to buy some spare parts such as crank shaft and rings.<br /><br />I contacted many boat mechanics. They suggested to take the motor or the shaft to them. Well! to carry the motor such a long distance or take off the crank shaft could be a nightmare if I would not find a replacement part! I hope this forums can help.

 

[achris]

Re: What is model of my Mercury 4Cyl 90HP?

The engine serial number is also stamped on an aluminium 'plug' on the right? side of the powerhead. It looks like a core plug. You're looking for a '0' then a letter and 6 numbers. We also have another problem. Merc produced a 6 cylinder 90 and a 3 cylinder 90, but never a 4 cylinder 90. If it's a V4 then it's a Johnrude or a Yamahaha.<br /><br />Chris..............<br /><br />P.S. Best thing you can do with 'Model 180, DOEL-FIN' is to throw it in the bin! Those things are dangerous and cause damage to engines.<br />Where in Oz?

 

[Spidybot]

Re: What is model of my Mercury 4Cyl 90HP?

Hi<br /><br />It's pretty hard to ID the thing based on this info.<br /><br />The Doel-Fin is an add-on and tells nothing about the motor.<br /><br />Post some pics and you'll get the info from here in no time.<br /><br />Also check manual on this link.<br />For the kinda job you're heading into a manual will pay back several times and is a must anyway.<br /><br />The decal coloring tells the year, like this:<br /> http://www.iboats.com/cgi-bin/ubb/ultimatebb.cgi?ubb=get_topic;f=29;t=012268

 

[PHUNG]

Re: What is model of my Mercury 4Cyl 90HP?

Thank you for your Suggestion Chris. I found the Alu Plug like a 10c on the side with serial 0D221445 as you explained. The motor has the cover of the 90HP. It is miss-leading, infact it is 115HP 4Cyl.<br /><br />I had this motor for a while but never know it is 115HP!!! until now. I will take off the 'Model 180, DOEL-FIN' after fix the motor.<br />In the Oz I am at Cairnlea, Bloody freezing this week! Thanks again<br />Phung Mai

 

[achris]

Re: What is model of my Mercury 4Cyl 90HP?

The year is 1993. <br />It's just got that way here. Horrible, miserable b**** rain!<br /><br />Chris..........

 

[DHPMARINE]

Re: What is model of my Mercury 4Cyl 90HP?

PHUNG,<br /><br />Using your serial # I came up with #473-9193a3 for the crank.U.S. list price is $1907.10.I would guess this puts the ball back on your turf,so to speak.<br />DHP

 

[DHPMARINE]

Re: What is model of my Mercury 4Cyl 90HP?

PHUNG,<br /><br />Using your serial # I came up with #473-9193a3 for the crank.U.S. list price is $1907.10.I would guess this puts the ball back on your turf,so to speak.<br />DHP

 

[DHPMARINE]

Re: What is model of my Mercury 4Cyl 90HP?

PHUNG,<br /><br />Using your serial # I came up with #473-9193a3 for the crank.U.S. list price is $1907.10.I would guess this puts the ball back on your turf,so to speak.<br />DHP

 

[DHPMARINE]

Re: What is model of my Mercury 4Cyl 90HP?

Hi all! ! I have absolutely no idea way the multiple posts<br />DHP

 

[achris]

Re: What is model of my Mercury 4Cyl 90HP?

DHP,<br /><br />Are you double clicking the "Add Reply" button?<br /><br />Chris.........

 

[PHUNG]

Re: What is model of my Mercury 4Cyl 90HP?

Yes. I have contacted a number of people, the cheapest was $1,500. It's not like cars is it but I only hope if lucky I can find a second hand one. <br />Phung

 

[WillyBWright]

Re: What is model of my Mercury 4Cyl 90HP?

I gotta ask this. Is that motor on a boat rated for a maximum 90Hp motor? (Some people will play with the stickers to cheat the max Hp rating.) What happened to your crankshaft? If you run the motor much more than the recommended 5250 RPMs, it'll snap. If you thought that was a 90 which I believe has a max 5500 RPMs then I believe we found out why it failed. If you're spending that much money, it might be wiser to go with a rebuilt powerhead. I don't know about Australia, but in the US it's illegal to overpower a boat (in most states). Selling a boat with a misrepresented motor could be grounds for a lawsuit. I'd consider going after the seller to help with the cost of setting things right.

 

[PHUNG]

Re: What is model of my Mercury 4Cyl 90HP?

Observe its spanking design, 4 Cyl, serial 0D221445, also. Chris comments on this forum: It is made 1993. Mercury don't make 4Cyl 90HP motor, so. I think the serial number is original but the motor cover, which confused every one else. Possible this motor has had a strange history before come to me but it is still an “energetic young boy". I can’t investigate his past but really want to safe him. I only hope time and communication will help me to find a secondhand crank shaft. My boat I bought separately. Only an old one but heavy, I need this “young boy” to push it.<br />P.S I've received an email. There is a 2nd hand crank shaft in QLD avail. hope it will fit ...<br />Phung Mai. Cairnlea Victoria

 

[DHPMARINE]

Re: What is model of my Mercury 4Cyl 90HP?

PHUNG.......<br /><br />I did some checking,'cause I can<br /><br />Your 90 is a 115HP<br /><br />DHP<br /><br />yes 1993 is correct