difference in the 200 and 225 in 1989 ?

[kevinj.]

the displacement is the same

what is the 25hp difference ?

Thanks

[ChampioNman]

Carbs and port timng.

[kevinj.]

thank you Sir !!!!


(that explains why the carb part numbers on mine match the 225 not the 200)

Have you ever seen a set of heads on one of these that are pollished aluminum and say custom built for (random guys name) ???

I am in the process of tearing my motor down for a rebuild (compression is 85# on all 6) and I am trying to determine what all has been done to this motor over the years


Thanks

[Melton Jason]

85 isnt that low for that engine

[ChampioNman]

Those may be Baker heads and may have been CC'd (milled and modified) to a spec other than stock. I would also suspect that the pistons are not stock and may be Wisco's. This is where you will need to be carefull with parts. You will need to soak the pistons in BRP engine tuner and put them on a bench grinder with a wire wheel to see the markings on the piston crowns to see exactly what you have.

[kevinj.]

well I have managed to get the motor torn down completely and just got it back from the machine shop - it is now .020 over and wiseco pistons are on order

Was stock bore and stock pistons
so I am still not sure what the deal is with the custom heads

also found one of the boysen reeds was broken so I am sure that was not helping matters

[ChampioNman]

Before you reassemble it wash it completely with warm soapy water I use Dawn dish soap in the water and also apply it to the sponge. Rinse it thoroughly with fresh water to flush the cylinders and cooling jackets. Dry it completely and apply two cycle oil to the cylinder walls with a cloth or paper towel soaked in the oil. It will help coat the walls and keep them from rusting too. Good luck with your project.

[noelm]

while I reckon a rebuild is kind of fun, I suspect you maybe doing this one for nothing, your compression was OK, maybe the broken reed was the problem? heads sometimes get replaced for a variety of reason, damaged, overheat at some time, corrosion, who knows, maybe the previous owner just wanted a bit more "go" and the heads were offered as a good bolt on option!

[DoferGofer]

<table width="90%" cellspacing=0 cellpadding=0 align=center><tr><td>Quote, originally posted by noelm &raquo;</td></tr><tr><td class="quote">while I reckon a rebuild is kind of fun, I suspect you maybe doing this one for nothing, your compression was OK, maybe the broken reed was the problem? heads sometimes get replaced for a variety of reason, damaged, overheat at some time, corrosion, who knows, maybe the previous owner just wanted a bit more "go" and the heads were offered as a good bolt on option!</td></tr></table>
kevinj. It would be nice to know what the compression is on this engine after the rebuild.

[kevinj.]

I will post the new compression numbers as son as we get it back together and broke in

I can tell you that 3 of them had stuck rings
and 2 where scorched pretty bad

and all 6 where dead on 85# (checked 3 times)

The reason for the rebuild was that this is a new to me boat that I am restoring and did not want to spend several weekends sanding and polishing and several thousand dollars in new interior to have the motor die
the manual says should be higher than 100# so since it was 85# we decided to go ahead and tear it down (and glad we did at this point)

[ChampioNman]

BE VERY Careful with the rod end caps! Make sure they are mated properly and the connecting rods are positioned properly in the cylinders with the lube hole for the needle bearings pointed to the flywheel and the dot for the end cap matched. Surface of the connecting rod and cap MUST be flush when tightening. Connecting rod and cap are frozen and broken when made, they MUST match. Failure to do so will cause catastrophic damage to the motor.

[kevinj.]

Thank you sir !!!!

any other tips you may have would be greatly appreciated !