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08-08-2019, 09:50 PM #465000 RPM
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New stator came in today. It came with a little plastic pouch of grease, but no installation directions. So where does this grease get applied?
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08-24-2019, 07:27 AM #475000 RPM
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So here it is:
1994 2.0L 150 Mercury
An abused rescue motor
Much more work than I wanted or expected
Mostly stock with a few upgrades:
- Converted from 25” to 20”
- One piston replaced
- Power trim upgrade from 3-wire to 2-wire
- CCMS reeds and stuffers
- Lower unit from 1988 XR4 (with new water pump)
- Lots of WD-40
- Removed Oil Injection System
- Removed RPM limiter
- Rebuild carbs
- Rebuild fuel pump
- Bob’s solid motor mounts
- Other new parts (e.g. starter, switch boxes, stator, new thermostats, etc.)
Tried to fire it up for the first time last night… started great… sounded great… boy was I excited!!!
Two problems though…
- There was a small amount of leaking around both thermostat housings. I had cleaned them both well before installing the new thermostats, and installed new gaskets. Anyone know if rtv or something else needs to be applied here?
- There was no water coming out of the tell-tale (pee hole). On these engines is this supposed to happen only after normal temp is reached? That’s how my XR4 is. I can tell you the engine did not run hot, although it was just for a short time.
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08-24-2019, 01:30 PM #48
Tell tale prob norm , especially at idle on hose , blip throttle time or 2 and c if tries pee then, stats and poppet gotta open, hiws water pressure? prob norm if all other coolin parts r new , dnt c y little rtv would hurt nething on stat housing, wanna say mine didnt have gasket but o ring built in maybe , been awhile
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Glastron1987 thanked for this postGlastron1987 liked this post
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08-26-2019, 07:23 PM #495000 RPM
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Didn't have water pressure gauge hooked up but there seemed to be water coming out. I tried blipping the throttle but it still was running cool. Will fix the leaks and run it again to see what happens. Maybe I'll mount it to the boat first.
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08-30-2019, 06:35 AM #505000 RPM
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What is a good WOT timing for this engine, with no limiter, not running? I was thinking 23 degrees btdc.
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09-08-2019, 08:22 PM #515000 RPM
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So today was my first real test run (breaking it in on double oil)...
The engine started great
It idled great, maybe a little high, but I'll leave if for now
No stalling at all
It had a really nice sound... low and smooth at all ranges. Actually pretty quiet.
It bogged slightly but not too bad at takeoff... Not sure if this is because of the exhaust relief slots, the horizontal reeds, the 22p prop, or too lean on the carb adjustments, but once it planed it was a rocket.
I didn't push it too hard because of the break-in, but it did 55mph on gps without breaking a sweat; there was lots left, so I am expecting it will into run into the 60's.
Overall an oustanding test run. Boy am I happy. Thanks for all the help and support from all of you on S&F.
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09-22-2019, 08:35 PM #525000 RPM
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Today was the third time out. Everything is running great except it bogs on hole-shot (couldn't pull me up on one ski even). Once it gets past that it runs great; even accelerated great. Top speed on the speedo was around 65-70mph at 5200rpm. This is with three full-sized people in it. At only 5200rpm it seems evident that I need a lower pitched prop. Currently I'm running a Lazer 22" (3-blade) prop, but remember my LU is from an XR4 so the ratio is 1.78:1. I'll be trying a 20" High Five next that I have and see what happens.... but I am wondering if some of the issue could be that the low speed carb adjustment needs to be richened up. If carb adjustment is needed, how can I tell for sure which of the 6 carbs needs the adjustment and how much to make?
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09-23-2019, 07:26 AM #53
Next time out give this a try
After its warm and u no its gonna bog sum , try run it trimmed down n gear at bout 1500 ,2000rpm for 10 or 15 sec and c if smooths out in that rpm range then stab it and see if it dont help ,,, u need another prop neway, the laser stock sucked everytime I tried one , just my experiences with em
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