New Toy

[bullie]

Coils are originals and cracked. Both still sparking though. So, I need a head gasket, impeller, and coils. Condensers? I had a manual for this motor online but a computer crash killed it. So I am searching for part numbers for the above.

[bullie]

Good news. Head cleaned up and gasket is replaced. Getting 82 and 85 on my gauge now. Next on the list is spark…

[2fast4me]

Sweet!

2Fast4Me

[chris-p]

PM me with your email address. Ill send you a new manual.

[Mumbles]

Here’s the owners manual to help you out.

---

Attachments:

1956 Johnson7.5HP AD10 AD Owners.pdf

[outbdnut2]

quote Bullie:

Coils are originals and cracked. Both still sparking though. So, I need a head gasket, impeller, and coils. Condensers? I had a manual for this motor online but a computer crash killed it. So I am searching for part numbers for the above.

Coils: 582995, or 584477, or Sierra 18-5181

Condensors: 580321, or Sierra 18-5199

points: 580148, or Sierra 18-5156

2 sets of Points & condensor kit: 18-5006

Impeller: 277181, or 434424, or Sierra 18-3991

Impeller plate: 305303, or Sierra 18-3102

Dave

[fleetwin]

Well, maybe the head surface is not flat, check it with a straight edge. The compression might just be low from sitting, maybe you can remove the intake bypass covers to see if the rings are rusted/stuck. In any event, it is a beautiful engine, and worth repairing. And, those stands usually bring big bucks, oftentimes more than the engines themselves…And, I’m sure that Oliver stand is very rare.
Your engine will need all the basic stuff, water pump, ignition, fuel, lower seal stuff, but that is no big deal…
Cool, just read your post and the compression came up, you are on the road to success now…

[bullie]

Thanks for the help guys. This is a great group of folks. It is really cool how people go out of their way to help.

Mumbles and Chris_P, I really appreciate the manuals. I was sent a set when I joined the club but a computer crash got everything.

Dan in TN has been doing his best to help me out too. Helping the new, slow, guy. LOL

[bullie]

quote fleetwin:

Well, maybe the head surface is not flat, check it with a straight edge. The compression might just be low from sitting, maybe you can remove the intake bypass covers to see if the rings are rusted/stuck. In any event, it is a beautiful engine, and worth repairing. And, those stands usually bring big bucks, oftentimes more than the engines themselves…And, I’m sure that Oliver stand is very rare.
Your engine will need all the basic stuff, water pump, ignition, fuel, lower seal stuff, but that is no big deal…
Cool, just read your post and the compression came up, you are on the road to success now…

I am excited about getting this one going. After replacing the head gasket and restoring compression I removed the power head and lower unit. I don’t think they had been off before. I think I pulled the original impeller out of the pump. It still looks good but has taken a bad set, of course. It may have been lots of years since this one was last run.

Kind of curious, does anyone have an idea approximately how long those original coils lasted before they began to crack and go bad? Just wondering how long this motor may have been stored. I imagine it varied a good deal.

[jerry-ahrens]

I don’t think the original coils had a very long life span due to the poor insulation. Finding a vintage OMC motor with cracked coils is a wonderful thing…. that usually means a low hour motor that hasn’t been ruined by running it 50/1. There getting harder to come by too.

[Author]

Posts