Please Help....

Olde Merc

Seaman
Joined
Jul 30, 2002
Messages
65
I have an older Merc 200 20hp. I think it is a late 1970's model. The serial number is 7054275 and it is a Canadian built engine. Would anyone know what year this engine is?<br /><br />Also, is there any place where I could get the specs on this engine. Like it's displacement, weight, etc....<br /><br />My engine runs pretty good for the most part, but it has a few little quirks I would like to repair. I don't have any experience working with outboards, but I have tons of experience working with automotive engines and other small engines, so I am sure I can tackle it. Where can I get information on how to repair these older engines.<br /><br />Any info that you can give me would be great. Thanks.
 

rickdb1boat

Supreme Mariner
Joined
Jan 23, 2002
Messages
11,195
Re: Please Help....

Olde Merc, <br /><br />Looks like you have a 1978 Model. Best thing to do is get a Manual(Click Below).<br /><br /> Manual
 

Olde Merc

Seaman
Joined
Jul 30, 2002
Messages
65
Re: Please Help....

Thanks for the info on the manual. I will see if I can pick one up. I was wondering if some of you guys could help me with the issues the motor has.<br /><br />First, the engine starts fine when cold and starts fine after its been running and restarted not too long afterwards. However, if the motor has been running and I leave it sit for a little length of time, say more than half an hour, it gets hard to start. I can always get her going, but it takes a lot of pulls. When it's cold, it fires up usually within a couple of pulls. When its warm, and has been sitting for a short time, it always starts one pull. What could be the problem here?<br /><br />I had the motor perfectly centered and bolted to my boat. I find if the boat runs at WOT it tends to pull to one side. If I let go of the till it will swing to one side very quickly. I had the boat loaded down once and so it was much slower at WOT. It didn't pull to one side when the boat was heavily loaded. What would cause this?<br /><br />And one other thing I about the motor that strikes me as odd. When you crank it to WOT it seems climbs up to a RPM limit. After running at limit at WOT for a little while, it all of a sudden sounds like it picks up a few hundred RPM again. It doesn't seem to gain much (if any) speed when the RPM's increase. I find that it takes longer to get that little RPM boost when the boat is loaded. Is this normal? <br /><br />Any help would be appreciated. Also, if anyone has anymore info on a 1978 200 20 hp Merc please let me know. Does anyone know the last year they made these old style Merc outboards (in 20 hp form).
 

Olde Merc

Seaman
Joined
Jul 30, 2002
Messages
65
Re: Please Help....

Can anyone help me at all?? Any advice on the above questions is much appreciated. Thanks again!
 
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