91 looper 120

[jy118lfd]

Well, I fixed my rpm problem on my 83 crossflow 150 by replacing it with a 91 120 looper. <br /><br />What rpm should I shoot for with this engine? <br /><br />What kind of performance should I look for on a 1973 aquasport 19-6?<br /><br />Any problems that should be checked before taking it out?<br /><br />It now has a new rectifer and water pump<br /><br />How is the economy with the big bore looper?

 

[Walker]

Re: 91 looper 120

I'd try for 5800-6000 rpm.<br />If you had that 150 on the same boat I think you'll be darn close to the same performance with the 120 and not great fuel economy, but better than the 6 cylinder. I've been running one for 11 years and I wouldn't trade it for any motor. Love those cubic inches.

 

[jy118lfd]

Re: 91 looper 120

Thanks for the response

 

[Cricket Too]

Re: 91 looper 120

I have the exact same boat, same year, with a '76 115 cross flow on it. Boat jumps onto plane right away hits about 30 or so at WOT, have to re-check again with the GPS next season. You'll probably get better performance with the looper.

 

[Brew2]

Re: 91 looper 120

My '86 140 looper has a limiter on the powerpack that keeps RPM from going over 6100. By myself I can just hit 6,100....with a few people on board I'm usually at about 5,800-5,900 at WOT.<br /><br />Fuel economy stinks....but what the heck, I didn't buy it to conserve on fuel!!