XR4 Black max 150

[dustinbarbane@yahoo.com]

I recently boat a 1986 dynatrak it has a xr4 black max 150. I need to order some parts for it. There's no serial numbers on the top of the motor or on the transom bracket. I need help trying to figure out what year it is

 

[Dukedog]

at tha base of number two cylinder on tha "block" half there is a "build date" stamp.. it will be m/d/yr.. 1/8" numbers.. might be hard ta see as some weren't stamped that well and/or thick paint but its there......

 

[dustinbarbane@yahoo.com]

Ok I'll check it out in the morning! I need to get an impeller kit, thermostats, poppet valve set, and rectifier. Not sure if all of those parts the same for black max 150 xr4. I was reading somewhere that xr4 150's were only from 88-92

 

[Dukedog]

xr4 was built from '87 ta '91... tha '91 was built on whats known as a "fat block".... its a 2.5 style block that is actually a piston port 2.4.... u need ta know for sure on year cause of type reg/rec, stator used.... some '89's and all '90/91's have a water cooled combined 40 amp reg/rectifier, stator... earlier used 16 amp stuff... pump, t-stats, poppet all tha same.........

 

[dustinbarbane@yahoo.com]

Thank you so much for your help. I found a number at the base of number two near the advance arm. It says 010989. So I'm guessing that means 01/09/89. But now when I try to get parts online everyone asks for serial numbers. I know now all the cooling system parts interchange but want to get the rectifier.

 

[dustinbarbane@yahoo.com]

And want to get carb rebuild kits

 

[Dukedog]

your in luck... all wh series take same parts, ie: gaskets and such... all they usually need is good cleaning and NEW gaskets.. if ya want i can get ya part/kit numbers..... do you have a manual for it?
does it have tha water cooled reg/rec.?

 

[dustinbarbane@yahoo.com]

That would be awesome! From what I gathered from memory I think the impeller kit is a 18-3314. The thermostats are 18-3553. The poppet valve set I wasn't sure on. And I don't think it's water cool I don't see any lines going to it just wires. I don't have a manual. I might get one now knowing the year.

 

[Dukedog]

no water lines.. it will be mounted on divider plate underneath tha coil plate.. will have a term block mounted right above it...

 

[dustinbarbane@yahoo.com]

Want me to take a picture of it?

 

[Dukedog]

would be good..... is this you email addy? if so i'll send parts breakdown for both 16 amp and 40 amp xr4's
dustinbarbane@yahoo.com[FONT=&quot] [/FONT]

 

[dustinbarbane@yahoo.com]

Yes it's my email address. Thank you so much I'll take a picture right now

 

[dustinbarbane@yahoo.com]

Picture is not uploading on here. Are carb rebuild kits all the same for this year?

 

[Dukedog]

Mfg Part #: 1395-6452.... kits.. they use ta sell just gaskets @ 'bout 5 bucks a set which is usually all they need but have added needles and seats and jacked up tha price!

 

[dustinbarbane@yahoo.com]

I appreciate your help so much thank you this helps a lot! One other thing I want to do is remove the advance boxes. Ok the top of number 2 there's one that says advance module. There's another small box with 2 posts. I've read to remove them and set crank time at wot at 21 degrees. Have you done this before? Also if so do you need to jump any wires ?

 

[Dukedog]

tha small one with exposed terminals is regulator.. it stays... module with a white/black and red/white can go away.. tha white/black "may" have "joint" made in tha sleeve before it gets to tha term on tha switch boxes...same wire goes to both switch boxes... you will need to make a short jumper that will replace it between tha two switch boxes... 21* will be fine..

 

[dustinbarbane@yahoo.com]

The advance box has a red, white and black wire. I'll remove that box. Looking at it. The regulator has no wires hooked up to it! I was going to replace the rectifier due to the tach wasn't working and and the system wasn't charging but now looks like I might have other problems.

 

[Dukedog]

lotsa guys don't run a reg on tha 16 amp stuff so thats not a big deal... not chargin' could be rec or stator... i'll see if i can find a pdf on your motor and send it... might be tomorrow.

 

[dustinbarbane@yahoo.com]

Ok thank you! Does not having the regulator shorten the battery life ?

 

[Dukedog]

with tha 16 amp stuff as long as you use quality equipment and good batt maintance, it won't hurt a thing...