2004 Johnson 115 slow to come uo to pad, top rpm's 4300

[Marine68102]

I have a 2004 Johnson 115 60degree on a Nitro 700. At the end of last summer it broke a crank. We rebuilt, new rings, bearings, crank etc. Also put a new stator in her.

Now it takes a quite a while to come up on pad and when it gets there top rpm's is 4300 and runs about 35mph. Top rpm's prior to rebuild was 4800-5000 and top speed, trimmed up was 45hmph.

Carbs were clean with new kits put in. Throttle linkage is correct. Not sure where to look next.

 

[jimmbo]

Compression test? Spark to all cylinders? All carbs getting fuel? Timing set correctly?
I think that engine has a WOT range of 4500 - 5500, so even before the crank breaking, the prop was a bit too big.

 

[Faztbullet]

Its down a cylinder....could have a piston/s installed wrong

 

[Marine68102]

Took it out today, same issue. #2 cylinder has a spark plug that looks like new, while others show normal. Put a new spark plug in and after some run time plug looks like new and was dry. Checked spark and spark is ok. Pulled carb, bowl was full, no junk, main jet clean. Just don't know why that cylinder is not getting any fuel.

 

[boobie]

Agree with post # 3 !!