SUBJECT: Adjustable needle valve kit.
40 h.p. RD(SL)-23 thru 24
40 h.p. RK(L)-24
75 h.p. V4S(L) & V4A(L)-13 thru 14
Since introducing fixed jets on the subject engines, we have received scattered reports of slightly reduced performance at high altitudes by comparison to older engines having adjustable high speed needle valves.
We now have available two conversion kits which will provide adjustable jets on the subject engines. Each kit is complete for the engine it is intended to convert - no other parts need be purchased.
| PART NO. | DESCRIPTION | LIST PRICE |
|---|---|---|
| 379188 | Adjustable high speed needle valve kit - 40 h.p. | $1.50 |
| 379189 | Adjustable high speed needle valve kit - 75 h.p. | 2.70 |
Although installation is very simple, instructions are nevertheless provided with the kit. As you can see in the illustration, the parts are very basic and no machining or alteration to the engine is necessary. In order to adjust the needle valve, the shroud has to be removed and a screw driver used. This minimizes customer "readjustment" which frequently proves to be a source of trouble.
Order these kits only from your parts distributor. List prices are subject to the standard accessory discount.
NOTE: Post on your RD (40 h.p.), RK & V-75 indexes.