Two different years shown Any way to tell by the motor itself.

[Jay_Son_McDaniel]

Hey Everyone, New here and cant seem to figure this out i have a 1975 135 evanrude... or maby its a 1978 140 Evanrude. i recently pulled to head cap off due to no compression and my piston has chipped off. luckly it dont seem too badly hurt but my problem is i dont know which parts to be looking for. ill post some photos in just a few that i got but, The tag on the Carb intake cover says a 1975. but the model number located on the transoim mount says its a 1978 140. any other way that i can tell for sure.

 

[racerone]

The 1975 has a big bracket at the back / top of the motor with one powerpack and 4 coils mounted on it.-------The 78 model has 2 powerpacks and 2coils mounted on each cylinder head.

 

[Jay_Son_McDaniel]

I had to take a low resolution photo but I have the 78 140 then. And your pro btw.

 

[racerone]

????----It appears to me that it is ---" one big bracket with one powerpack and 4 coils on it"----That would be the 1975 model ignition system as explained in post # 2 above.

 

[Jay_Son_McDaniel]

Sorry misunderstood there. so that being said any way to find a model for this then the 1978 was pulled from the transom bracket via the model number. the 1975 135 was on the carb sticker with no model number given.

 

[emdsapmgr]

The ignition system is certainly from the 135. One way to tell if the block is a 140 is to pull the two exhaust manifolds off and see if there is a rib machined cutout at the bottom of the exhaust chest. This first pic is of a 135 block with the later 140 cutout machined into it. The 135's don't have the machined cutout-part of the reason for the extra 5 hp, in addition to the rubber intake filler blocks.

 

[Jay_Son_McDaniel]

I'll have to wait till next weekend before I pull anything else apart. Don't guess I need the model number piston is OEM 5006658 for the 135. Just trying to get this running on a tight budget. Confident I can do it just new to outboard work. I'll double check the block for that cutout before I order anything. Thanks again for your help.

 

[racerone]

Repair parts between the 2 models would be the same.-------------No spend any money till the parts are lined up and examined on the work bench.