1990 force 50. Starts right up. Sounds good, Wont but 10mph

[stevez9one6]

1990 bayliner 1990 force 50. Boat sat for a few years. My first boat . It needed some work but I thought it would be fun. Got it running. did full carb kit with main inlet. Re did fuel lines , clear so I can see its getting fuel. Getting spark both cyl. Good enough to fire first click and it kicks right away in gear. Just won't go over 11ish. I recently noticed sludge comming from the drain hole near the lower unit bolt. I dropped the lower unit this weekend and saw it was getting gear oil into the water pump area and thanks to a post, replaced a bad seal. Would that cause it to be slow? I refilled it. Ran it for a while. Dropped it again to make sure I didn't see any more. I saw a old post for a similar issue, but here it goes. Thank you to The Force power

 

[jerryjerry05]

If the motors revving up?? and not going
anywhere???
The props probably has a spun hub.

 

[stevez9one6]

Brand new prop. It kicks right up, but seems im only getting half the power it should be or less. Ive read this motor should kick around 30mph givin weight and prop ect.. I noticed I can pull the line back a bit more from the engine and make it rev and push more. Could this be set to low to stop me? I don't want to over push. On water it sounds like I'm pushing near max, but only moving 11mph(gps). I have no tact, and can't see rpms, I'm going by ear on the carb adjustment as is but it sounds solid. Any thoughts ? Thanks guys

 

[stevez9one6]

[No message]

 

[stevez9one6]

[No message]

 

[MrMarty51]

Push the throttle wide open and be sure that the throttle plate on the carb is in a flat position, full wide open.

 

[stevez9one6]

This is full throttle does that look right?

 

[The Force power]

This is full throttle does that look right?

First off...thank you for the compliment
In full throttle mode, look in the throat of the carb. and see if the throttle-plate is in or very close to horizontal ?

Inspect the fuel-tank's vent.
Check the Compression on both Cylinders

Keep us posted

 

[mysteryboy28]

Look inside the carb. You'll see 2 plates. The first one is your choke. That stays open unless you engage the choke. The second one, further inside, is the throttle plate. It's almost fully closed when you're at idle, and should be flat/open when your're in wide open throttle on the boat's throttle.

When you rev it up out of the water (with muffs or in a bucket of water, NEVER dry!), does it rev up nice and snappy, or does the RPM go up rather gradually?

I have this same motor, and had to go through a LOT of troubleshooting to get it running right.

 

[stevez9one6]

Thank you mysteryboy28 and everyones input! Much respect.. Sorry I havnt been on in a litte, but on the carb, the plate in the back is working right i checked on it today. Flat at wide open. Messed with carb on water. noticed the choke sits at a slant even when wide open . I opened up on the water today and put that thing flat with my finger and oh what a difference. I think i hit about 22, at least double what it was.. but I had the boat fully loaded with pops and the kids. I tried adjusting the stick and screw that pull when choke engages but it kept going back to slant. Gonna work on it soon

 

[The Force power]

To verify if the adjustment is set right for the choke butterfly:

Push the rod (connected to the plunger) down into the solenoid & see if the butterfly is closed (not tightly closed) adjust if necessary.

Make sure the plunger going into the solenoid is clean & lightly lubricated (do not use grease)
Energize choke-solenoid to if close & de-energize if fully open!!
Make sure the small return-spring is in place