|
Need help with OMC 50 hp 2 cyl to 60 HP conversion
To make a long story short, my 1985 Evinrude 50 (2cyl) with a jet foot
attached just isn't quite enough to plane out 2 people at my 5000 ft+
altitude. So, lacking the funds for a new motor, I am converting it to
the 60 hp version, or at least attempting to. I understand this will
shorten the life of the motor and reduce the reliability, but not being
able to plane out is no fun either.I have obtained 60 hp carbs and intake and was just about to install
them when I heard the exhaust may also need to be modified. I can
still obtain the exhaust parts if I need them but don't want to go
through the extra expense and hassle if I don't. Does anyone out there
know for sure if the exhaust differs between the 50 and 60 hp versions
of this motor and if so, what parts do I really need? Your help would
really be appreciated. Thanks,
Mike |
mlvosk
May 11
2006
|
| Thanks for the advice, I found a catalog on line at: http://epc.brp.com/ According to this, the exhaust parts are the same, looks like I lucked
out. Thanks again for taking the time to respond. |
mlvosk
May 11
|
| Is this the 35 Jet 2 cylinder looper? Rob |
trainfan1
May 11
|
| You will need to get the parts diagrams & lists to compare the
mid-section exhaust tuner part numbers. By '85, (since the 1976 55 hp) the 2 cylinder loopers(40-45-50-55-60)
shared the 45 CID displacement. I think the de-tuning was done at the
carb throat size. Do you need the jet? Going back to a gearcase will give you more push
and allow you to easily change props to get the rpm range where it
should be. Rob |
trainfan1
May 11
|
| Oh, you said '85. 35 Jet wasn't available yet from the factory. You will need to get the parts diagrams & lists to compare the
mid-section exhaust tuner part numbers. By '85, (since the 1976 55 hp) the 2 cylinder loopers(40-45-50-55-60)
shared the 45 CID displacement. I think the de-tuning was done at the
carb throat size. Do you need the jet? Going back to a gearcase will give you more push
and allow you to easily change props to get the rpm range where it
should be. Rob |
trainfan1
May 11
|
| Rob, it is the 2 cyl 50 hp looper with a jet foot attached (giving 35
at the jet or more like 28 at my altitude). MV |
mlvosk
May 11
|
| Wish I didn't need the jet, but I run the South Fork of the Snake
through the summer and running a prop would get pretty expensive,
though it might be a wash with gas being what it is now. Marine
dealers are a bit scarce up here and I don't know where to get a hold
of a parts list to compare the two. Any thoughts? Thanks,
MV |
mlvosk
May 11
|
| Rob, You mention the mid-section tuner as being possibly different. I
assume by that you mean the "tin" inside the midsection and not the
entire midsection? I can still get that piece and if it is just a
matter of replacing that with the carbs and intake to be sure then it
seems like a no-brainer. If I need to replace the entire mid section
maybe my fishing buddy and I need to loose weight or take less gear
until I can afford a real upgrade. MV |
mlvosk
May 11
|
|
|
Disclaimer: This is a computer-generated and formatted feed of current postings to a public
Internet forum. We do not control the information delivered, nor do we endorse or monitor its
content. Internet forums may carry offensive, harmful, inaccurate, and otherwise inappropriate material.
|
|
