Topic: 1977 Johnson 2 hp 2R77C Carb – Page 2 – Antique Outboard Motor Club,Inc

This topic has 29 replies, 8 voices, and was last updated 9 years, 3 months ago by PugetSoundBoater.

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May 9, 2016 at 4:02 am #36274
PugetSoundBoater
Participant
Fleetwin- also after running at WOT ,and going down to idle slowly, it was fine. Also fine going from Idle to Wot quckly or slowly. I think I got it as set best as possible.
Still a bit hard to start though,when cold. When all warmed up it’s easy to start ,used a rope today,since I had the recoil off to use a Stewart Warner handheld tach. Thanks. Jim

"Some people want to know how a watch works, others just want to know what time it is"
Robbie Robertson
May 12, 2016 at 2:04 am #36448
fleetwin
Participant
US Member
Yes, I meant richen it out 1/8th turn. But, all engines are different, so go ahead and try the high speed needle at its peak RPM and see what happens.
Perhaps you choke linkage is messed up causing the choke to be/stay fully closed while cranking. I don’t know if the orientation makes a difference in the choke knob, but a worn/missing grommet will surely cause problems when starting cold.
May 12, 2016 at 1:18 pm #36460
reivertom
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US Member
Isn’t the compression on those motors supposed to be pretty high…..around 110? Maybe it is the compression keeping it from idling well.
May 12, 2016 at 1:35 pm #36462
fisherman6
Participant
US Member
I’m not sure what the compression is supposed to be on these motors but I have a 1978 2R78R and it is right close to 90 psi also. It runs and idles well but sometimes it takes more to start than I think it should. It is pretty finicky about the carb settings. Once it’s dialed, in snug up the packing to avoid accidentally moving it. That’s pretty easy to do on these motors.

OldJohnnyRude on YouTube
May 12, 2016 at 9:35 pm #36481
reivertom
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US Member
I have a ’84 model that I’ve never touched…..This thread has me dreading getting started on it… I hope It runs decent.
May 13, 2016 at 12:40 am #36490
fisherman6
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US Member
There isn’t much to these little 2hp singles. I wouldn’t be too apprehensive. I have a 75 Evinrude 2hp I need to get into a bit deeper. When I got it one of the reeds was bent. It still doesn’t want to pop. Not sure what’s wrong yet. I’ll figure it out eventually. They are neat little motors.

OldJohnnyRude on YouTube
May 13, 2016 at 2:33 am #36498
Mumbles
Participant
Here’s a ’72 two horse which never did seem to want to run right. It kept getting harder and harder to start and finally wouldn’t start at all. Under the head I found a blown head gasket with a matching burn thru groove in the top of the cylinder. A little bit of time in the lathe straightened out both the head and the cylinder. The local dealer brought the crank seals in but I had to order new bearings from China. A new piston and rings were found online so hopefully after a new paint job and decals it will run again.

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May 13, 2016 at 12:20 pm #36505
fisherman6
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US Member
Nice work Mumbles. You should make a video of it running in the boat once you get it finished. 😉

OldJohnnyRude on YouTube
May 13, 2016 at 3:54 pm #36513
PugetSoundBoater
Participant
Good work Mumbles. I havn’t seen the insides of one of these till viewing your photos.

"Some people want to know how a watch works, others just want to know what time it is"
Robbie Robertson
May 14, 2016 at 12:30 am #36528
Mumbles
Participant
I’ll post a vid later whenever I get it together. Not sure when.

Did I say ’72? I think this one’s actually a ’73 and another one I had was a ’72 motor. They all start to look the same after a while.

Here’s another reason I’m glad I tore it down. The water tube had been rubbing on the driveshaft and was almost worn thru. 😯

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