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3.0l jasper reman. no power

H

hhmarine

New member
I just installed a 3.0l jasper reman long block. It runs great untill you put it under load. I took it to the lake and it got up to 2200 rpm's with 4 people in the boat. I have checked the spark, retimed it according to factory specs. I have checked for fuel issues and everything looks good on the motor. compression is 110lbs on all 4 cylinders. The only thing that had me concerned is when it was fired up for the first 5 minutes it was making a loud clattering noise in the timing chain area, then after a few minutes it dissapeard and everything looked and sounded good, untill I took it to the lake. I am out of ideas and thought maybe somebody had a similar issue. (the motor is carbureted so its not a computer or sensor issue)
 
timing chain ? 110 compression on a brand new motor ?

You set up the valves how? Fuel pump is giving you what psi ?

The motor came with the plugs and wires installed or you had to hook up the old ones ? If you hooked them up you hook them up in the proper order ?
 
It was a longblock so the valves were already set, The motor was primed. It has been ran for about 2 hours so it is not broken in yet. The motor did not come with new plugs or plug wires, but i installed new plugs, and then later tried new plug wires. The plugs when i took them out looked the proper color (tannish, grey) I did not check fuel pressure however i did spray some carb and choke cleaner in the carb while running it at high speed, That extra fuel just made the motor chug and die. Yes i know the plugs wires are in correct order, 1,3,4,2 and the timing is set to 1 degree BTDC while the jumper wire was attached.
 
Redo the valves i do them with the motor running have plenty of rags.

What else was the motor doing, the gauges, anything unusual ?

I don;t want to suggest things, but was anything else amiss with the motor ?
 
I put a different distributor in it and that seemed to help it a little. I was getting 12 degrees BTD at idle adn 20 Degrees at 2500rpm. the book calls for 25 degrees at 2500. With the old distributor i had 8 Degrees at idle and 18 degrees at 2500rpm's but the distributor tested good with an ohm meter. Everything else gauge wise looks good. What determines the spark advance on these motors, because it seems to me it should be in spec with a brand new distributor, but its still off a few degrees.
 
What year/ignition is in ur boat.... Also 110 psi is the same as a worn out motor. Get a different/new compression guage. Retest and repost.

A fresh rebiuld in my opinion she be ~140 psi.

Agree with readjusting valve train....
 
Or is he asking about jasper not how the guy fared with the motor he bought the original poster.

The original poster never came back after a year to tell us what happened.

But ok if i had the choice of a rebuild or a new 3.0 i would go with new depending on certain things like year of the original motor.

See the 3.0 crank changed in 88, i believe you would have mondo problems getting the coupler on the flywheel of a pre 87' 3.0.
 
My Boat is a 2001I ended up gettimg the Jasper. A new engine was about 2500, buy i was able to get the jasper for$ 2100, the price wasnt the deciding factor, but the warranty. 18 months parts And labor. The new one was only 12 months parts only.
 
i mean this from the bottom of my heart i wish you nothing but good luck and enjoyment from your boat.

And is at anytime you need more assistance please post all of us here are ready to offer our best advice.
 
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