140 hp Johnson

That was always a good strong running engine for me after I figured out how to work on loopers. The small bore engine is a little low on torque down low, but once it gets a few RPM's up it is a beast. If you get it propped right it is really good on fuel to. I found propping it to spin up to 5800 RPM's or so WOT is where it was happiest. If you load it much harder it drank alot more fuel, and much less and it guzzled at cruise. Get it in it's sweet spot and it would burn about 6 GPH at a 3800 RPM cruise. Get it off and it would suck down 9-10 at the same RPM's.
 
shurlock said:
second run top speed 33 miles per hour Florida Everglades:nice::nice:
140 hp Johnson second run after powerhead changed: https://youtu.be/8lZU2lBUo14
Click to expand...

Do you have a working tach on it? Sounds like your turning maybe 5K RPM's which is way to low. I would expect alot closer to 40 or low 40's out of that engine on that boat. I know that 140 would hang would just about any 150 on a simliar boat, and 150's will push a V-20 to 40-42 no problem. Also it looks like your getting alot of spray off the foot, so your engine may be mounted to low. Check to see what prop you have on it as you should be spinning a 15 pitch stainless, anything bigger and it will bog the engine down. And that 1.8L engine HATES being lugged, it likes RPM's. The limiter in it is set at 6100, and I used to prop it so that if I trimmed it just a tad high it would bump the limiter. That always gave me the best fuel milage, and the best power out of it.
 
will have to buy one

tachometer is currently not working will have to buy one I have one that you hold on the flywheel sounds a little dangerous though. there is a fairly large aluminum prop on there not sure the pitch will find out soon
 
A 15 pitch prop should put you where you need to be with that engine. Over propping or mounting the engine will lug the engine, and lead to a very short lifespan. 2 strokes HATE being over propped, and is a HUGE killer of powerheads. This is why EVINRUDE now sets up each and every boat sold with an ETEC as it was found improper setup was the cause of almost all of the early ETEC failures. Under propping and spinning it up to high isn't that bad, but over propping and over loading will kill one in a HURRY!
 
Ferms right it sounds like it lacking in RPM's I was running a 13 x 15 stainless on the same motor and getting 42 on mine at 5900 rpm.
 
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