140hp johnson preformance??

[Devonaaron]

Looking to repower my 85hp is just not something I would like to play with anymore theirs a leak in the crank case or lower main seal its leaning out at idle in neutral 4th cyl. Have no interest in tearing apart I because I would like more power as it is. I would like to get a 140hp johnson/evinrude that 85hp takes me about 33 MPH I also have a choice on buying a 120hp looper johnson. I really just go fast on my Glastron v176 swinger a very nice boat. I really dont want a mercury I just want a johnyrude that will take me fastttt. Any ideas about my choice in engine.

 

[JB]

Re: 140hp johnson preformance??

ETEC, Devonaaron. Whatever your Glastron is rated for (no more). If you are gonna spend bux just to go faster why not do it right?

 

[emdsapmgr]

Re: 140hp johnson preformance??

The old Glastrons were great boats and responded well to hp increases. You need to decide just what engine you want. OMC made crossflow 140's for a few years, then derated them to 115 through 1997. The replacement 140's (similar to the 120 you mentioned) were larger engines, quite a bit heavier and were loop charged. There are big differences between the technolgies of crosslfow and looper. Another option: You will find the carbureated 60 degree 115 looper engines are compact, have lots of torque and have a great reliability record.

 

[boobie]

Re: 140hp johnson preformance??

I'll go along with JB. To go faster it costs $$$$.

 

[SparkieBoat]

Re: 140hp johnson preformance??

the 115 will be the same weight as your old 85...if you to a 120 you are at the same weight as a 150/175...if your boat is rated for it a 150/175 would really take that boat for a ride..be sure to check transom well for cracks/rot..and get a transom saver...

 

[Devonaaron]

Re: 140hp johnson preformance??

Bought the 120hp looper 1990 looking at props I would like to get a ballistics prop but so unsure of props i have no idea I have a V176 glastron not a really big boat just am looking to find a good prop ran a 85hp johnson with 17 pitch prop but totally different motor ran at about 34 MPH

 

[emdsapmgr]

Re: 140hp johnson preformance??

The prop off your 85 will temporarily work on the 120. Did the 120 come with a prop? Likely you will need to go to a higher pitch prop, like a 21 or a 19. The factory recommended rpm range is between 5000 and 6000 rpm. I'd prop it to run just under 6000 at full throttle. You will get better performance and fuel economy.