88 Rude 150 Low RPM's

[jaqfan]

e150stlcga
r1819548
88 Rude 150 XP
Just got the boat, Max RPM's are 4300. Raker 24 prop.
Sluggish comming out of the hole and max rpm's trimmed up is 4300, Idles @ 900 in and out of gear... At times wants to stall at idle. The bulb is soft when running wot but pumping the ball did not help things. VRO disconnected, I cleaned the Plugs, linkage and carbs (not rebuild) fresh gas. The carbs appear to be opening fully on the muffs and will run up to 6k on the hose. Voltage meter shows 12.5-13.0 when running wot.
Thanks for the help

[ChampioNman]

Pop in a new set of Champ QL77JC4's gapped at .030 and see if it helps. Is the clear plastic sleeve on the throttle roller? Compression OK?

[jaqfan]

I'll check the sleeve in the morning.. What does the sleeve do?.. Comp check will be done in the morn.

[bkfish]

6000 grand on the hose?
I thought thats about when
internal parts became external!

[DoferGofer]

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jaqfan &raquo;</TD></TR><TR><TD CLASS="quote">e150stlcga
r1819548
88 Rude 150 XP
Just got the boat, Max RPM's are 4300. Raker 24 prop.
Sluggish comming out of the hole and max rpm's trimmed up is 4300, Idles @ 900 in and out of gear... At times wants to stall at idle. The bulb is soft when running wot but pumping the ball did not help things. VRO disconnected, I cleaned the Plugs, linkage and carbs (not rebuild) fresh gas. The carbs appear to be opening fully on the muffs and will run up to 6k on the hose. Voltage meter shows 12.5-13.0 when running wot.
Thanks for the help </TD></TR></TABLE>
What size boat do you have? The Raker 24 may be too much prop. The bulb will not stay hard but should not go flat. If you continue to rev it up to 6k on the muff, you are going to blow your engine, not over 1500 on the muff.
What does the Voltage meter show at idle?

[Lockjaw]

It helps it get full throttle.

You need to check timing too. And I would decarb it.

[jaqfan]

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DoferGofer &raquo;</TD></TR><TR><TD CLASS="quote">
What size boat do you have? The Raker 24 may be too much prop. The bulb will not stay hard but should not go flat. If you continue to rev it up to 6k on the muff, you are going to blow your engine, not over 1500 on the muff.
What does the Voltage meter show at idle?



</TD></TR></TABLE>
It is a 18' ft Stratos pro 181, The same prop I ran on my Ranger with Rude 150 XP and ran @ 5600 wot and 61.2 Gps by myself. So I should be able to turn that Raker 24 with no problem. Voltage @ idle is 12 volts. Bulb is not going flat just soft

[Earl320V]

motor to low on transom. ? Measure it,motor may have to go up on transom.

[DoferGofer]

I still think the raker 24 is too much prop for you XP150, The largest prop my 1985 XP150 would turn was 21+ SST on a 1985 17'.8" Manatee run-a-bout @ 54-5600 rpms, 60 mph.
My XP is now on a 2003 19' Key West center console spinning a 19 SST @ 53-5400 rpms, 46-48 mph.
Your voltage at idle seem low to me. If you are only getting 12 volts at idle with no accessory on then I don’t think your stator is keeping up.
As for the bulb, most primer bulbs will lose some firmness when the engine is running. This is normal. The bulb should not run dry of fuel or collapse in suction, but it will tend to lose some of the hard firmness it had when initially primed.
Another consideration is Earl’s suggestion about the engine height.



Regards,

[Bassmeister]

Melvin, the bass boats will usually turn the 24 Raker or 23 Gade.

[DoferGofer]

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bassmeister &raquo;</TD></TR><TR><TD CLASS="quote">Melvin, the bass boats will usually turn the 24 Raker or 23 Gade.</TD></TR></TABLE>
Michael,

I will take your word for bass boats and the 24 Raker. However, if he is only getting 12 volts on his volt gauge at idle, either his battery is dead or his charging system is not up to par.



Regards,